S. Sivarajasingam 1/
The contribution of buffalo to the Asian agrarian economy is considerable by way of milk, meat and draught power production and as a source of security that requires minimum inputs. The domesticated buffaloes in Asia, representing 98 percent of the world buffalo population, are broadly grouped as the river and swamp types. The former which constitute approximately 69 percent are found predominantly in the Indian subcontinent. In India they supply 59.3 percent of the total milk produced.
The multipurpose swamp buffalo (30 percent) predominates in other parts of Asia especially China, Indonesia, Philippines, Thailand and Vietnam providing draught power and meat in rice growing areas and milk in other regions. The Mediterranean type predominant in west Asia, represent about 1 percent. The buffalo distribution in Asia is given in Table 1 by country. It is sufficient to mention here that the wild buffalo such as Anoa of Celebes, Tamarao of Mindoro and the Ami or Indian wild buffalo do exist and could provide potential genetic resources for further investigation.
Table 1 BUFFALO POPULATION IN ASIA BY COUNTRY, 1984
Country |
Population (x 1000) |
|
West |
Asia |
|
Iran |
230 |
|
Iraq |
140 |
|
Syria |
3 |
|
Turkey |
758 |
|
South |
Asia |
|
Bangladesh |
1 750 |
|
Bhutan |
28 |
|
India |
64 000 |
|
Nepal |
4 400 |
|
Pakistan |
12 777 |
|
Sri Lanka |
951 |
|
East |
Asia |
|
China |
19 196 |
|
South |
least Asia |
|
Brunei |
15 |
|
Burma |
2 100 |
|
Indonesia |
2 391 |
|
Kampuchea DM |
600 |
|
Laos |
915 |
|
Malaysia |
255 |
|
Philippines |
2 900 |
|
Singapore |
2 |
|
Thailand |
6 150 |
|
Vietnam |
2 664 |
|
Total |
122 225 |
Source: FAO
The trends in the growth of human and buffalo populations in Asia are given in Figure 1. There is a steady increase in the human population while that of the buffalo is not sustained at a similar pace. Buffaloes produce 45 percent and 31 percent of all milk and meat produced in 1984 by large ruminants in Asia, respectively (FAO statistics).
Figure 1. Trends in buffalo and human populations in Asia (Adapted from Mahadevan, 1983, Proc. Preconf. Syrap. of the 5th World Conf. on Anim. Prod., Tsukuba, Japan and FAO, Production Yearbook 1970-1983).
Buffaloes have been domesticated over several centuries. However, they have been subjected to genetic manipulation such as selection and crossbreeding only during recent decades. By virtue of the fact that it is Often conSidered a neglected species, much of its genetic variation may not have been lost except through natural selection in the domestic environment. However, two areas of concern need to be mentioned. Firstly, a complete documentation and evaluation of the variability and characterization of the various breeds and strains are lacking. Secondly, the animals, the swamp type in particular, are being displaced from their traditional ecosystems due to changing farming practices, agricultural intensification and inadequate allocation of multiplication facilities. These problems are worsened by their low reproductive rates.
This paper is mainly concerned with the potential of the buffalo germplasm which is the basis for improvement, effective methods of conservation and utilization and constraints of buffalo rearing in Asia. This will be discussed under the following headings:
2. Buffalo Performance Characteristics
2.1 Milk yield and length of lactation
2.2 Weight characteristics
2.3 Size characteristics
2.4 Carcass characteristics
2.5 Breeding efficiency
2.6 Draught characteristics
3. Genetic Improvement of Buffaloes
3.1 Selection for size
3.2 Breeding and selection for milk
3.3 Breeding and selection for beef
3.4 Breeding and selection for draught
3.5 Multipurpose breeding strategies
4. Crossbreeding River and Swamp Buffaloes
5. Conservation, Improvement and Utilization
5.1 Genetic conservation - why?
5.2 Genetic conservation - how?
5.3 Improvement within conservation
6. Conclusion
The potentials for improving the river and swamp buffaloes depend on the existing genetic variability within and between breeds, standards of health, feeding and management and infrastructure for recording of production data. A considerable amount of evaluation or documentation studies or both have been reported on buffaloes under varying environments. A brief review of the various production traits is given below only to show overall characteristics of the buffalo breeds.
2.1 Milk Yield and Length of Lactation
Milk is an important source of animal protein (including essential amino acids), vitamins and minerals. Efforts to improve buffaloes and cattle have been undertaken in many developing countries where the rural poor are largely dependent on livestock. A summary of yields of buffalo breeds is presented in Table 2.
The river buffalo, extensively used in the Indian subcontinent for milk production, has a production average between 1181 kg to 1934 kg with lactation lengths ranging between 283 and 313 days. The most widespread breed is of the Murrah type which has also been exported to several southeast and east Asian countries for crossbreeding with swamp buffalo. The latter breed, rarely used for milk production, produces less than 800 kg per lactation of about 250 to 330 days. Work on persistency and milk let-down in milch buffaloes is limited. It is a usual practise to allow calf suckling for about 30 to 40 seconds before milking to initiate milk let-down. Whether this is really necessary needs further investigation. Table 3 shows overall averages for buffalo milk constituents. Fat percent ranged between 7 to 10 with a mean of 7.5 amongst dairy breeds. Values for swamp buffalo were within a similar range but only a few samples were available. These values for buffalo are more than double that of cattle for which the mean is 3.7 percent. Protein percent is also higher than for cattle where mean is 3.5. The calorie value of buffalo milk is 31.5 percent higher than that of Bos taurus cows such as Friesian and Guernsey (FAO, 1959).
Table 2 LACTATION MILK YIELD AND LENGTH
Mean lactation |
||||
Milk (kg) |
Length (days) |
|||
India
|
Murrah |
1 813 |
283 |
Bhat et al. 1980; Gill 1985; Mostager et al. 1981; Rao and Nagarcenkar 1977 |
Nili-Ravi |
1 765 |
309 |
Bhat et al. 1980; Rao and Nagarcenlcar 1977 |
|
Bhadawari |
1 181 |
276 |
Bhat et al. 1980; Rao and Nagarcenkar 1977 |
|
Surti |
1 934 |
313 |
Bhat et al. 1980; Rao and Nagarcenkar 1977 |
|
China |
Swamp |
778 |
293 |
Liu 1978; Cheng 1984 |
Malaysia |
Swamp |
245 |
240 |
Camoens 1976; Braend 1981 |
Thailand |
Swamp |
333 |
250 |
Chantalakhana 1975 |
Philippines |
Swamp |
490 |
245 |
Eusebio 1975; Rigor 1958 |
Sri Lanka |
Swamp |
355 |
248 |
Jalatge 1980; Wijeratne 1962 |
Nepal
|
Nepali |
255 |
121 |
Keshary and Shrestha 1980 |
Murrah |
1 272 |
255 |
Keshary and Shrestha 1980 |
Table 3 MILK CONSTITUENTS OF BUFFALOES
Country |
Breed |
Fat % |
Protein % |
Total Solids % |
Source |
India |
All |
7.5 |
4.3 |
16.8 |
FAO 1959 |
China |
Swamp |
9.8 |
- |
- |
Cheng 1984 |
Thailand |
Swamp |
9.3 |
- |
18.1 |
Chantalakhana 197E |
Philippines |
Swamp |
9.4 |
5.2 |
20.4 |
Eusebio 1975 |
2.2 Weight Characteristics
Body weights at various ages of adult buffaloes are given in Table 4. Birth weight and subsequent weights are higher than indigenous cattle in these areas of Asia. Mature buffaloes over three years of age weigh between 450 and 800 kg. A number of comparisons have been made on weight gains between buffaloes and cattle, from which no definite conclusions could be made bearing in mind the low quality of inputs we need to consider reflecting the actual conditions of the smallholder farms. It is interesting to note here the trials of Shute (1966) in Trinidad where the daily gain of buffaloes was 0.21 kg compared to zero values for Jamaica Red cattle and Brahman cattle under poor pastures. The gains increased to 0.62 kg for buffaloes and 0.50 and 0.30 kg for the other cattle breeds respectively on moderate pastures.
Table 4 BODY WEIGHTS AT VARIOUS AGES (KG)
6 mths |
12 mths |
18 mths |
|||||
India
|
Murrah |
29 |
119 |
212 |
264 |
500 |
Bhat 1977; Randhava 1962 |
Nili-Ravi |
31 |
134 |
219 |
289 |
510 |
Bhat 1977; Randhava 1962 |
|
China |
Swamp |
34 |
167 |
250 |
- |
577 |
Liu 1978 |
Malaysia |
Swamp |
32 |
138 |
204 |
281 |
- |
Aman and Othman 1983; Camoens 1976 Liang et al. 1982 |
Thailand |
Swamp |
29 |
98 |
144 |
- |
473 |
Chantalakhana 1975, 1981, 1984 |
Philippines |
Swamp |
28 |
88 |
121 |
141 |
463 |
Campos 1985 |
Sri Lanka |
Surti |
21 |
- |
- |
- |
- |
Thamothanam 1980 |
Taiwan |
Swamp |
- |
- |
- |
- |
425 |
Ma 1980 |
2.3 Size Characteristics
The milk buffaloes of India are strikingly larger than their swamp counterparts in east and southeast Asia where they are used for draught purposes as shown by the three body measurements in Table 5.
Table 5 BODY MEASURMENTS
Country |
Breed |
Weight (kg) |
Body length (cm) |
Wither height (cm) |
Heart girth (cm) |
Source |
India
|
Murrah |
Adult |
150 |
138 |
222 |
ICAR 1939, 1941, 1950, 1960 |
Nili-Ravi |
Adult |
153 |
133 |
222 |
ICAR 1939, 1941, 1950, 1960 |
|
Surti |
Adult |
141 |
128 |
188 |
ICAR 1939, 1941, 1950, 1960 |
|
China |
Swamp |
495 |
147 |
128 |
193 |
Liu et al. 1985 |
Thailand |
Swamp |
500 |
140 |
126 |
190 |
Chantalakhana 1975, 1981 |
Taiwan |
Swamp |
425 |
138 |
127 |
193 |
Ma 1980 |
Philippines |
Swamp |
Adult |
- |
128 |
197 |
Bacaiso 1951 |
2.4 Carcass Characteristics
In Table 6 some characteristics of buffalo carcass are given. Most of the work has been concentrated on the swamp type. Dressing percentage in most reports is below 50 percent whereas in cattle it is usually a little above 50 percent. However, the Murrah buffalo proved to be superior in many carcass traits (Ognjaovic, 1974) including a dressing percentage of 54.7 percent. There are considerable differences between the swamp buffalo reports due to the wide differences between reports, in the methods of characterization of the various cuts, variation in feeding, age and sex of the animals and regional genetic differences within the swamp buffalo.
Table 6 CARCASS CHARACTERISTICS
Country |
Breed |
Trait |
Sexes |
Mean |
Source |
China |
Swamp |
Dressing percent |
M,F,C |
43 |
Cheng 1984 |
Thailand |
Swamp |
Dressing percent |
M,F |
46 |
Chantalakhana 1984, 1975 |
Philippines |
Swamp |
Dressing percent |
M,F,C |
45 |
Castillo 1975 |
Malaysia |
Swamp |
Dressing percent |
M |
47 |
Liang et al. 1982 |
Sri Lanka |
Swamp |
Dressing percent |
M,F |
51 |
Tilakaratne 1980 |
Taiwan |
Swamp |
Dressing percent |
M,F |
44 |
Ma 1980 |
China |
Swamp |
Bone percent |
M,F,C |
34 |
Cheng 1984 |
Thailand |
Swamp |
Bone percent |
M,F |
22 |
Chantalakhana 1984 |
Philippines |
Swamp |
Bone percent |
M,F |
25 |
Castillo 1975 |
Thailand |
Swamp |
Slaughter wt, kg |
M,F |
500 |
Chantalakhana 1975 |
Philippines |
Swamp |
Slaughter wt, kg |
M,F |
364 |
Castillo 1975 |
Malaysia |
Swamp |
Slaughter wt, kg |
M |
306 |
Liang et al. 1982 |
Philippines |
Swamp |
Carcass length, cm |
M,F |
115 |
Castillo 1975; Eusebio 1975 |
Malaysia |
Swamp |
Carcass length, cm |
M |
131 |
Liang et al. 1982 |
Thailand |
Swamp |
Hide percent |
M,F |
13 |
Chantalakhana 1975 |
Philippines |
Swamp |
Hide percent |
M,F |
12 |
Castillo 1975 |
Thailand |
Swamp |
2 Rib eye area, cm2 |
M,F |
42 |
Chantalakhana 1984 |
Philippines |
Swamp |
Rib eye area, cm2 |
M,F |
37 |
Castillo 1975 |
Thailand |
Swamp |
Loin eye area, cm2 |
M,F |
42 |
Chantalakhana 1984 |
M = male, F = female, C = castrates
Ages range between 2-5 years.
A number of studies have compared carcass characteristics between buffaloes and cattle (Kissir et al.', 1969; Ognjanovic, 1974 and Charles and Johnson, 1972 and Charles, l982) and showed only marginal differences in quantity and quality indicating that the buffalo has a potential role to play in the beef industry of Asia.
2.5 Breeding Efficiency
A major concern in buffalo production is its low reproductive efficiency. The oestrous cycle in buffalo is similar to that of cattle although their external manifestation is not as strongly expressed as in cattle. Peak luteal levels of plasma progesterone are lower (1 to 2.5 ng/ml) and occur later in the cycle (Kamonpatana et al., 1979 and Jainudeen et al., 1982).
Overall reproductive performance compiled by a review of references is given in Table 7. Age at puberty amongst swamp buffaloes was reported to be at 2.8 years and first mating usually after the third year. However, these values largely depend on management factors. Among Murrah buffaloes, first signs of heat were also observed at the age of 2.8 years (Bhattacharya, 1954). Late first calving age and long calving intervals are common. Longer calving intervals are frequent especially among the swamp types used for draught purposes because they are rarely exposed to bulls and pregnancy when having a suckling calf running along is considered a nuisance in the field. Oestrous cycle varies between 20 and 28 days with some variation in the oestrous duration. Postpartum oestrus and bull fertility are also largely affected by seasonal variations.
2.6 Draught Characteristics
The draught power of the swamp buffalo has been reported in various countries in southeast Asia and China Table 8). They are often used in rice cultivation for ploughing. On the average they plough between 0.025 to 0.032 hectares of padi land per hour. Number of working days vary between two months and five months depending on the type of agricultural activity. Buffalo have been reported to be far superior to contemporary indigenous cattle in Taiwan (Ma, 1980). Buffalo can plough an area almost three times that covered by Yellow cattle per day. They also outlive their cattle counterparts by having a working life of 10 to 15 years compared to 6 to 12 years for cattle.
The primary function of the swamp buffalo as a beast of burden has been greatly reduced due to mechanization and the introduction of double cropping in Malaysia, China, Taiwan and Thailand. However, they are salvaged in areas where fragmentation of farms has led to small units as in Thailand and the buffalo remains a significant component. More recently, swamp buffalo are being used to haul bunches of fruit in oil palm plantations in Malaysia. They are superior to mini-tractors in that they could reach all points of collection even on difficult terrain.
More than 70 percent of buffaloes are nondescript and are in the hands of villagers. Genetic improvement could only be realized if there is a simultaneous alleviation of feeding and management standards including proper recording and Al or a superior bull distribution network on the ground. Objectives, in line with the envisaged production system, should also be well defined. The buffalo indigenous to China and southeast Asia, covering a wide range of ecosystems, is generally grouped together as the swamp type although distinct types are recognized. The swamp buffalo has a multipurpose role and is usually confined to traditional farming systems. The relative priority of each role varies from region to region. It is important to identify those types of buffaloes that are more efficient in draught, beef production or adaptability so that breeding goals can be more precisely defined.
Recently in 1984 ACIAR organized a workshop on the evaluation of large ruminants for the tropics in Rockhampton (ACIAR, 1984). It was obvious, also in the case of the present review, that the information available was scanty and 'disconnected' in the sense that no breed could be meaningfully characterized and its potential compared with other breeds of buffaloes. It is useful to mention here that some of the workshop's
Table 7 REPRODUCTIVE CHARACTERISTICS
Trait |
India |
China |
Malaysia |
Thailand |
Philippines |
Taiwan |
Sri Lanka |
Source |
Age at puberty (yrs) |
2.8 |
2.8 |
2.8 |
3.0 |
- |
- |
- |
Camoens 1976; Chantalakhana 1975; Cheng 1984; Liu 1978 |
1st mating age (yrs) |
- |
3.3 |
- |
- |
- |
3.0 |
- |
Cheng 1984; Liu 1975, 1978 |
1st calving age (yrs) |
3.5 |
4.7 |
- |
- |
3.6 |
- |
3.6 |
Bhat 1980; Eusebio 1975, 1984; Jalatge 1980; Liu 1985; Rao 1977 |
Gestation (days) |
308 |
315 |
332 |
- |
320 |
- |
309 |
Liu 1978; Eusebio 1984; Wijeratne 1962; Camoens 1976; Cheng 1984; Jalatge 1980; Mostager et al. 1981; Rao 1977 |
Calving interval (days) |
480 |
651 |
395 |
415 |
- |
Bhat 1980; Camoens 1976; Chantalakhana 1981; Eusebio 1984; Gill 1985; Liang et al. 1982; Mostager et al. 1981; Rao 1977 |
||
Post partus oestrus (days) |
- |
296 |
- |
- |
- |
- |
- |
Liu et al. 1985 |
Oestrus cycle (days) |
- |
23 |
28 |
20 |
22 |
- |
- |
Camoens 1976; Campos 1985; Chantakakhana 1981; Cheng 1984; Ensebio 1984; Liu 1984 |
Oestrus duration (hr) |
- |
43 |
4 |
32 |
22 |
- |
- |
Camoens 1976; Campos 1985; Chantakakhana 1981; Cheng 1984; Ensebio 1984; Liu 1984; Liu et al. 1985 |
Calving rate |
- |
- |
- |
56 |
- |
- |
- |
Chantalakhana 1981; NaPhuket 1975 |
recommendations included identification of genetically different populations of the swamp buffalo, an increase in their draught efficiency, and numbers especially in Thailand and China and milk capacity in Philippines. A similar approach could also be extended to the buffalo of the Indian subcontinent with emphasis on milk and draught efficiency.
Table 8 DRAUGHT POWER PERFORMANCE
Country |
Breed |
Trait |
Sexes |
Mean |
Source |
China |
Swamp |
Plough, ha/h |
M,F,C |
0.028 |
Cheng 1984; Liu 1978 |
Thailand |
Swamp |
Plough, ha/h |
F |
0.025 |
Songprasert and Niempus 1978 |
Taiwan |
Swamp |
Plough, ha/h |
F |
0.032 |
Ma 1980 |
Taiwan |
Swamp |
Burden capacity, kg |
F |
869 |
Ma 1980; Liu 1975 |
Taiwan |
Swamp |
Draught power, kg |
F |
287 |
Ma 1980; Liu 1975 |
China |
Swamp |
Cart load/an., kg |
F |
1 000 |
Cheng 1984; Liu 1978 |
Thailand |
Swamp |
Cart load/an., kg |
F |
155 |
Ma 1980 |
Taiwan |
Swamp |
Cart speed, m/min |
F |
51 |
Liu 1975; Ma 1980 |
Thailand |
Work days/year |
F |
122 |
Buranamanas 1963 |
|
Taiwan |
Work days/year |
F |
53 |
Liu 1975; Ma 1980 |
M = males, F = females, C = castrate
3.1 Selection for Size
Size is an important characteristic to be considered only in relation to efficiency of milk, meat or draught production and adaptation. The buffalo is at the larger end of the size scale among all domestic indigenous ruminant livestock and its surface area to body weight is therefore smaller compared to other species in the same environment, especially cattle. It has also been reported that buffaloes have a larger gastrointestinal volume than cattle (Moran and Wood, 1982) in relation to total body size. This has a bearing on feed intake which is in turn positively associated with rate of passage of feed and negatively related to digestibility. The complex relationship between size and other factors such as intake, digestibility, heat load and its dissipation within the river and swamp types needs to be further studied before breeding goals can be formulated. A curvilinear relationship was observed between body size and milk yield among Holsteins where sires that were just above average for size proofs produced daughters that yielded more milk than smaller or larger contemporaries (Sivarajasingam et al., 1984). A similar trend may be expected in the tropical environment.
3.2 Breeding and Selection for Milk
A considerable amount of work has been done in India including progeny testing for milk (Nagarcenkar, 1979; Gill, 1985 and Tiwana and Dhillon, 1985). The milk yield in 305-days and total yield increased from 1062 kg and 1120 kg in 1971 to 2346 and 2450 respectively after 12 years of selection through a progeny testing programme. Heritability for milk yield among river buffalo shows a medium to high value (Table 9). However, reproductive traits in Table 10 show lower estimates but higher than in most cattle breeds. These figures indicate much genetic progress could be achieved through selection of superior bulls for milk production. The current genetic limit for milk yield which is as high as 4000-4200 kg (5 animals) per lactation of 305 days is encouraging (Gill, 1985). It will be of interest to study the efficiency at these high levels compared to cattle of similar production.
Table 9 HERITABILITY (h2) AND
REPEATABILITY (r) OF LACTATION
YIELD AND LENGTH
Lactation |
|||||
Yield h2 |
r |
Length h2 |
|||
India |
Murrah |
0.24 |
0.50 |
0.11 |
Agarwala 1955; Bawa and Dhillon 1980; Bhat et al. 1981; Dhinsa 1963; Mangurka and Desai 1981; Rao and Nagarcenkar 1977; Singh and Desai 1962; Sreedharan and Nagarcenkar 1978 |
Pakistan |
Nili-Ravi |
0.20 |
- |
- |
Ashfaq and Mason 1984 |
Sri Lanka |
Murrah |
- |
0.49 |
0.06 |
Mahadevan 1960 |
Table 10 HERITABILITY OF SOME REPRODUCTIVE TRAITS
Trait |
Country |
Breed |
Mean |
Source |
1st calving age |
India |
Murrah |
0.25 |
Agarwala 1955; Bhat et al. 1981; Gokhale and Nagarcenkar 1974; Goswami and Nair ?; Gurung and Johar 1983; Mangurka and Desai 1981; Rao and Nagarcenkar 1977 |
Calving interval |
India |
Murrah |
0.17 |
Bhat et al. 1981; Rao and Nagarcenkar 1977 |
Gestation period |
India |
Murrah |
0.11 |
Arunachalam et al. 1981; Bhat et al. 1981; Ghanem 1955;Rao and Nagarcenkar 1977 |
3.3 Breeding and Selection for Beef
An improvement programme for beef production has been limited to the last few years mainly in China and Thailand. Main characteristics were weights at weaning and later ages. Heritability for body weights are given in Table 11 and are generally medium to high as in the case of beef cattle.
information regarding river buffalo is limited but genetic variation is expected to be high. Response based on performance testing for growth and family selection for carcass characteristics will prove effective. As for dairy buffalo, implementation of improvement programmes with farmers will involve high costs and management difficulties. A possible solution is to establish test stations around the country to evaluate selected bulls for growth, carcass (using relatives), reproductive and draught characters. Top bulls are selected and used to improve the national herd. Embryo transfer technology could be a useful tool here to multiply bulls for natural mating in the absence of proper facilities for AI.
Table 11 HERITABILITY OF BODY WEIGHTS
Age |
Country |
Breed |
Mean |
Source |
Birth |
India |
Murrah |
0.45 |
Bhat et al. 1981; Rao and Nagarcenkar |
1977; |
Tomar and Desai 1965, 1967 |
|||
India |
Surti |
0.16 |
Rao and Nagarcenkar 1977 |
|
Thailand |
Swamp |
0.63 |
Chantalakhana 1981; Chantalakhana 1984 |
|
6 months |
India |
River |
0.37 |
Bhat et al. 1981; Mangurka and Desai 1981; Tomar and Desai 1965 |
12 months |
India |
River |
0.57 |
Bhat et al. 1981; Rao and Nagarcenkar 1977; Tomar and Desai 1965 |
24 months |
India |
River |
0.57 |
Bhat et al. 1981; Mangurka and Desai 1981; Rao and Nagarcenkar 1977 |
3.4 Breeding and Selection for Draught
Breeding for genetic improvement involves retention of superior males for semen collection, and females for regular calf production. However, most of the buffaloes identified for draught are deprived of their normal reproductive activity. Males if not sold for beef, are often castrated. For the females, having to nurse a calf is considered a nuisance by the owner during ploughing. Even if the animals are fertile and given the opportunity to mate, the rate of success is expected to be low due to the low levels of feed quality and stress due to work in the field.
In many countries, the farm sizes are declining due to fragmentation resulting in an accompanied increasing scarcity of feed resources. Under such circumstances the decline in body size as a result of castration of larger animals for draught purposes may prove to be a compromise or even an advantage (Mahadevan, 1985). He cites the work of Vercoe et al. (1985) who favour more efficient utilization of small animals for draught purposes under situations of limited feed resources and selecting for superior heat tolerance individuals within the population. However, the choice of identification of existing strains that are heat tolerant, low in maintenance requirement and resistant to parasites and other diseases amongst the swamp buffalo population and using them in crossbreeding programmes may be more applicable in developing countries (Mahadevan, 1985).
3.5 Multipurpose Breeding Strategies
Although selection for site, milk, beef and draught has been discussed separately, they are not mutually exclusive and they are also not the only traits of concern. Buffaloes in smallholder and institutional farms are known to have slow reproductive rates and high mortality rates. These are largely due to environmental and partly genetic factors. As was mentioned earlier, more than 70 percent of the buffaloes in all countries of Asia can be considered nondescript. Well defined breeds and breeding programmes are only confined to institutional farms. This needs to be extended to improve the national herds hand-in-hand with development of a recording system and related infrastructure. However, costs of operating such a system based on conventional progeny testing will be enormous. An alternative system like the Irish progeny testing and selection programme (Cunningham, 1979) will be more effective. This system will also allow selection for total economic merit to include traits like reproductive efficiency and feed efficiency which are vital in buffalo production.
Breeding strategies tend to vary from country to country. In the Indian subcontinent, breeding for milk first and draught second will continue. In southeast Asian countries, except Malaysia, draught power is of prime importance followed by beef in most areas or milk in the Philippines. In Malaysia and to some extent in the Philippines and Sri Lanka, swamp buffaloes are significant contributors to the beef industry. However, declining buffalo numbers due to the advent of farm mechanization, their slow reproductive rates and few numbers compared to the indigenous Kedah-Kelantan cattle in Malaysia, the future of the swamp buffalo in this country is uncertain. A solution to this problem is to upgrade them using Murrah or Nili-Ravi or both breeds into a dual purpose dairy beef buffalo. This will further enhance the existing village ghee industry and other milk products for which there exists a substantial market. Attempts to conserve the buffalo as a beef animal especially in the Philippines, Thailand, Indonesia, Taiwan and China need to be studied. Besides the fact that their population is decreasing due to earlier mentioned mechanization, low reproductive rates and high mortality rates, the buffalo are also decreasing in size due to reasons discussed earlier in this paper.
Another area that has been extensively discussed, but little work has been done, is efficiency of feed utilization by buffaloes. Buffaloes are considered more efficient utilizers of coarse feeds than cattle but this has not been well documented.
Crossbreeding has been practised in almost all countries where swamp buffalo predominates i.e. China, Burma, Thailand, Philippines, Malaysia and Sri Lanka with the desire of improving milk yield capacity and size for work in the field. China started crossbreeding work as early as 1960 and produced some 45 000 crossbreds by 1977 (Wang, 1979) through AI. The crosses have been further upgraded with Nili-Ravi resulting in grades with 50, 25, and 25 percent of Nili-Ravi, Murrah and swamp buffalo levels of inheritance. They have been evaluated (Liu et al., 1985) and summarized in Table 12.
The crossbreds in the above report had good conformation, a massive body structure with well develped hindquarters, with an average daily gain of 0.8 kg on grass. Average fat content of crossbred milk was 7.5 percent. The temperament of triple crosses as superior but the same could not be said for the halfbred, Murrah x swamp crosses. Reports on crossbred performance, although on a smaller scale, have also been reported in the Philippines (Eusebio, 1975), Taiwan (Liu, 1975), Sri Lanka (Jalatge, 1980) and Nepal (Keshary and Shrestha, 1980). These reports had lower milk yields ranging from 492 to 956 kg than the work in China shown in the Table 12. However, the results do indicate genetic potentials of crossbreeding to improve the swamp buffalo for milk and meat. In this context, it is also relevant to note that an FAO/UNDP project in collaboration with the Philippine Council of Agricultural Resources, Research and Development (PCARRD) has an ongoing evaluation of the progeny resulting from mating of different breeds/strains of river buffaloes with the Philippines carabao for use as draught, milk and meat animals (Mahadevan, 1985). Preliminary results showed an increase of 32 percent in birth weight, an increase by 100 percent in weight at 18 months (average 300 kg) and a 3 to 4-fold increase in milk yield (1200 1 in 300 days) than the native carabao (Ranjhan, 1985).
Table 12 CHARACTERISTICS
OF CROSSBRED BUFFALOES
(adapted from Liu, 1985)
Character |
Swamp |
Murrah |
Nili-Ravi |
M x S |
N x (MS) |
Colour |
light grey |
black |
black |
grey |
black |
White chevron |
present |
absent |
absent |
present |
rare |
Switch |
black |
white |
white/ black |
white |
white (longer) |
Horns |
long, lateral curve backwards |
short, spiral curl |
short, curled back |
curve semicircle |
- |
Draught power (kg) |
65 |
- |
- |
F1
80.8 |
- |
Plough mu/h |
0.48 |
- |
- |
F1 0.73 |
53.0 |
Dressing percent |
48.5 |
- |
- |
F1 56.2 |
- |
Muscle percent |
36.9 |
- |
- |
F1 42.6 |
- |
Meat:Bone |
1:3.8 |
- |
- |
F1 1:4.8 |
1:4.5 |
Puberty age (days) |
- |
667.0 |
915.5 |
669.0 |
605.3 |
Age first service (days) |
- |
1 201.4 |
1 048.0 |
974.3 |
831.3 |
Oestrous cycle (days) |
- |
23.2 |
23.7 |
21.5 |
21.6 |
Gestation period (days) |
- |
305.5 |
303.9 |
309.9 |
306.3 |
First postpartum oestrus (days) |
- |
94.7 |
127.9 |
170.6 |
71.0 |
Calving interval (days) |
- |
455.4 |
465.8 |
539.5 |
381.6 |
Milk yield (kg) |
- |
1 975.5 |
2 076.0 |
2 662.0 |
1 153.7 |
Crossbreeding between swamp and river buffaloes raises an area of concern. The differences in the chromosome numbers between swamp (2n = 48) and river (2n = 50) (Fischer and Ulbrich, 1968) buffaloes may have an effect on the fertility of the offspring considering synaptic possibilities in the F1s resulting in some genetically, unbalanced meiotic products that degenerated. This was revealed by Bongso et al. (1983) where a large proportion of degenerating spermatocytes and abnormal spermatids were found in testicular biopsies of F1 hybrids. The F1 produced by river and swamp matings had a chromosome number 2n = 49 (Fischer and Ulbrich, 1968 and Bongso and Jainudeen, 1979). Reports by Bongso et al. (1984) showed further segregation resulting in three F2 populations (2n = 48, 49 and 50), two populations (2n = 49 and 50) when backcrossed to river buffalo and two populations (2n = 48 and 49) when backcrossed to the swamp buffalo. These interesting findings were however limited to small sample sizes. It is now necessary to relate these genotypes (different chromosome numbers within different levels of exotic inheritance) to fertility and extent of heterosis for production traits in smallholder farms and large commercial ones.
The buffaloes of Asia have evolved within their ecosystem over several centuries and have thus acquired adaptive characteristics and still remain useful in food production. The review of literature above though not exhaustive, and previous meetings on Animal Genetic Resources Conservation (FAO, 1981, FAO, 1983 and SABRAO, 1981) have revealed that although a wealth of information has accumulated, large gaps exist in the total characterization of buffaloes and other species. For instance, efficiency of the buffalo for milk, meat, draught or multipurpose on high and poor quality roughages and byproducts is limited or absent. Such information is vital in agricultural planning strategies and allocation of animals and breeding programmes to various farmers and farming systems. The buffalo of Asia are generally lumped together as the swamp type although wide variation is recognized. Blood markers are useful in the characterization of breed structure and the relationship between the varieties of the buffalo population. Blood markers, especially those related to membrane antigen, may be of value for understanding, control and eradication of diseases (Braend, 1981).
5.1 Genetic Conservation - Why?
Conservation of live specimens of buffaloes or other livestock consumes sizable manpower, valuable space and costs besides demanding proper planning skills. However, the buffalo needs to be conserved for the following reasons in brief:
5.2 Genetic Conservation - How?
Without going into details, the following points need to be highlighted.
Conservation by the last two methods has been discussed at length and mode of action outlined (FAO, 1983).
5.3 Improvement within Conservation
It is evident that the buffalo plays an integral part of our farming system and its numbers have been maintained or increased. Various river breeds have been documented and evaluated. Strains of swamp buffalo have been observed but attempts to characterize them genetically have yet to be made. Conservation should begin with a proper sampling technique to represent the existing variability and in sufficient numbers. In these populations for conservation, selection should be minimal and to maintain population size constant, either random culling or culling based on total merit should be practised. However, for the national herds genetic improvement could be achieved through selection and crossbreeding. For both, germplasm collection and national herd data banks are essential to monitor their genetic progress.
The total buffalo population now stands at 122 million in Asia. The swamp buffalo population is decreasing in some countries, especially Malaysia, Thailand, Philippines and Taiwan. Growth and carcass characteristics of buffalo and cattle are comparable. Draught capacity and the working lifespan of buffalo is superior to that of cattle. There is a management tendency in smallholders to deprive larger swamp buffaloes from producing offspring leading to a high likelihood that the buffalo body size may be affected. The river buffalo is larger than the swamp. Interrelationship between size, growth, milk yield and draught power needs to be further studied also with respect to feed efficiency and adaptation. The former produce about 1800 kg milk per lactation of 305 days. First calving age, intercalving periods and postpartum oestrus are longer than in cattle and perhaps this is a physiological phenomenon associated with a longer (310 days) buffalo gestation period. Feed efficiency with complete characterization of the buffalo breeds is timely with data banks having interregional links for exchange of information and material. The various strains of swamp buffalo need to be identified. Their special capabilities and adaptation to the particular niche has to be defined. Conservation of valuable breeds and strains of buffaloes is reemphasized before genetic variation is"diluted. Finally, crossbreeding and its advantages are being pursued in various countries and show preliminary prospects of genetic improvement of swamp buffaloes in spite of initial setbacks of differences in chromosome numbers between the river and swamp buffaloes and the genetic imbalance in germ cells resulting from meiosis.
ACKNOWLEDGEMENT
The author wishes to thank the Director-General of MARDI for permission to attend the meeting and present this paper.
REFERENCES
1984 |
ACIAR. Evaluation of large ruminants for the tropics. J.W. Copland (Ed.). ACIAR Proc. Series No. 5. |
1955 | Agarwala O.P. Indian J. Dairy Sci. 8: 89-93. |
1961 | Agarwala O.P. Indian J. Dairy Sci. 14: 8-11. |
1983 | Aman A. and Othman S. In: Current development and problems in swamp buf falo production. Proc. Preconf. Symp. 5th World Conf. on Anim. Prod., Tsukuba, Japan. |
1952 | Arunachalam T.V., Lazarns A.J. and Anantakrishnan C.P. Indian J. Dairy Sci. 5: 117-123. |
1984 | Ashfaq M. and Mason I.L. Emp. J. Exp. Agric. 22: 161-175. |
1951 | Bacaiso J.M. Philipp. Agric. 35: 163-169. |
1980 | Bawa K.S. and Dhillon J.S. Indian J. Dairy Sci. 33: 144-145. |
1977 | Bhat P.N. In: 3rd International Congress of SABRAO, Canberra, Australia. |
1981 | Bhat P.N., Kumar R. and Raheja K.L. In: Animal improvement research. Proc. 4th International SABRAO Congress. T.K. Mukherjee (Ed.), SABRAO. |
1980 |
Bhat P.N., Bhat P.P., Khan B.U., Goswami O.B. and Singh B. Proc. SABRAO Workshop of Animal Genetic Resources in Asia and Oceania. TARC, Japan, pp. 119-199. |
1954 | Bhattacharya P. In: The husbandry and health of the domestic buffalo. FAO, Rome. W.R. Cockrill (Ed.), pp. 105-158. |
1979 |
Bongso T.A. and Jainudeen M.R. Kajian Vet. 11: 6-9. |
1983 | Bongso T.A., Hilmi M. and Basrur P.K. Research in Vet. Sci. UK. |
1984 | Bongso T.A., Nava Z.M., Duran P.G., Momongan V., Campos F. and Ranghan 5.R. Trop. Veterinary. 2: 177-182. |
1981 | Braend M. In: FAO. pp. 243-257. |
1963 | Buranamanas P. Kasetsart University, Bangkok (Cited by Chanthalakhana, 1981). |
1976 | Camoens J.K. Bull. No. 145. Ministry of Agriculture, Malaysia. |
1985 | Campos A.C. 1st World Buffalo Congress, Cairo, Egypt. 2: 125-151. |
1975 | Castillo L.S. In: The Asiatic water buffalo. FFTC/ASPAC, Taiwan. pp. 36-58. |
1975 | Chantalakhana C. In: The Asiatic water buffalo. FFTC/ASPAC, Taiwan. pp. 226-241. |
1981 | Chantalakhana C. In: SABRAO. pp. 91-110. |
1984 | Chantalakhana C. In: ACIAR. pp. 29-36. |
1981 |
Chantalakhana C, NaPhuket S.R., Kamnerdpetch v., Tumwasorn S. and Johnston J.E. Thai J. Agric. Sci. 14: 175-179. |
1982 | Charles D.D. Anim. Prod. 34: 79-84. |
1972 | Charles D.D. and Johnson E.R. Cited by Ognjanovic, 1974. |
1984 | Cheng P. Livestock breeds of China. FAO Animal Production and Health Paper No. 46. FAO, Rome. |
1974 | Cockrill W.R. The husbandry and health of the domestic buffalo. FAO, Rome. |
1985 | Cockrill W.R. 1st World Buffalo Congress, Cairo, Egypt. 2: 3-20. |
1979 | Cunningham E.P. In: Dairy Cattle Breeding in the Humid Tropics. FAO Expert Consultation, Hariana Agricultural University, Hissar, India. pp. 21-29. |
1963 | Dhinsa H.S. Indian Vet. J. 40: 352-361. |
1975 |
Eusebio A.N. In: Asiatic Water Buffalo. Food and Fertilizer Technology Centre for the Asian and Pacific Region. pp. 257-283. |
1984 | Eusebio A.N. In: ACIAR. pp. 13-20. |
1959 | FAO. National Studies No. 17. FAO, Rome. pp. 5-6. |
1981 | FAO. Animal genetic resources conservation and management. FAO Animal Production and Health Paper No. 24. Rome. |
1983 | FAO. Animal genetic resources. FAO Animal Production and Health Paper No. 44, Vols. 1 and 2. |
1968 | Fischer H. and Ulbrich F. Z. Tierzucht. Zucht Biol. 84: 110-114. |
1955 | Ghanem Y.S. Indian J. Vet. Sci. 25: 301-311. |
1985 | Gill S.S. 1st World Buffalo Congress, Cairo, Egypt. : 114-124. |
1974 |
Gokhale S.B. and Nagarcenkar R. NDIR Ann. Rep. (Cited in Sharma, 1985). pp. 119. |
1965 | Goswami S.B. and Nair A.P. Indian J. Dairy Sci. 18: 137-140 |
1983 |
Gurung B.S. and Johar K.S. ISAGB Seminar, March 1983. (Cited in Sharma 1985). pp. 48. |
1984 |
Hodges J. In: FAO Animal Production and Health Paper No. 44, Vol 1. FAO, Rome. |
1939 |
ICAR. Imperial/Indian Council.of Agric. Res., Bull. Cited by W.R. Cockrill, 1974. |
1941 | |
1950 | |
1960 | |
1982 | Jainudeen M.R., Bongso T.A. and Tan H.S. Anim. Reprod. Sci. 5: 181-186. |
1980 |
Jalatge E.F.A. Interim Report, Workshop on Water Buffalo Research in Sri Lanka. University of Peradeniya, Sri Lanka. |
1979 |
Kamonpatana M., Van De Viel D.F.M., Koops W., Leenaunuruksa D., Ngramsuriyaroj C. and Usanakornkul S. Theriogenology. 11: 399-404. |
1980 |
Keshary K.R. and Shrestha N.P. Proc. SABRAO Workshop in Animal Genetic Resources in Asia and Oceania. TARC, Japan, pp. 423-433. |
1969 | Kissir S.M., McFetridge D.G. and Hansen N.G. In: Technical Report No. 21. FAO, Rome. |
1982 |
Liang J.B., Arief M.O. and Wahab A.Y. In: Animal Production and Health in the Tropics. Proc. 1st Asian-Australasian Animal Science Congress. M.R. Jainudeen and A.R. Omar (Eds.), University Pertanian, Malysia. pp. 355-360. |
1975 |
Liu C.H. In: Asiatic Water Buffalo. FFTC/ASPAC, Taiwan. pp. 242-256. |
1968 | Liu C.H. Taiwan Agricultural Quarterly. 5: 90-95. (Cited by Ma, P.C.S. 1980). |
1978 | Liu C.H. Mimeograph. (Cited in Chantalakhana, 1981). |
1985 | Liu C.H., Chang S.S. and Huang H.P. Buffalo J. 1: 9-18. |
1969 |
Ma R.C.S. Scientific Agriculture. 17: 454-462. |
1980 |
Ma R.C.S. Proc. SABRAO Workshop on Animal Genetic Resources in Asia and Oceania. TARC, Japan. pp. 339-384. |
1960 | Mahadevan P. Emp. J. Exp. Agric. 28: 99-103. |
1985 | Mahadevan p. 1st World Buffalo Congress, Cairo, Egypt. 2: 253-263. |
1981 | Mangurka B.R. and Desai R.N. Ind. Vet J. 58: 199-202. |
1948 | Marsh T.D. and Dawson V. Malaysian Agric. J. 31: 102-114. |
1982 | Moran J.B. and Wood J.T. J. Agric. Sci. (UK). 98: 493-498. |
1981 |
Mostager A., Morsy M.A. and Sadek R.R. Zeitschrift fur Tierzuchtung und Zuchtungsbiologi. (Anim. Breed. Abst. 50: 710.) 90: 220-236. |
1979 | Nagarcenkar R. In: Dairy Cattle Breeding in the Humid Tropics. Hariana Agricultural University, Hissar, India. pp. 92-107. |
1975 |
NaPhuket S.R. In: Asiatic Water Buffalo. FFTC/ASPAC, Taiwan. pp. 157-187. |
1974 | Ognjanovic A. In: The Husbandry and Health of the Domestic Buffalo. R.W. Cockrill (Ed.). FAO, Rome. pp. 377-400. |
1962a |
Randhava M.S. Indian Coun. Agric. Res., New Delhi. |
1962b | Randhava M.S. Agriculture and animal husbandary in India. Indian Coun. Agric. Res., New Delhi. |
1985 | Ranjhan S.K. 1st World Buffalo Congress, Cairo, Egypt. 11: 97-113. |
1958 | Rigor T.V. Proc. 8th Pacific Sci. Congr., Pacific Sci. Assn. 43: 382-386. |
1977 | Rao M.K. and Nagarcenkar R. World Rev. Anim. Prod. 13: 53-60. |
1981 | SABRAO. Evaluation of animal genetic resources in Asia and Oceania. Proc. 2nd SABRAO Workshop. Ed. J.F.S. Baker, T.K. Mukherjee, H.N. Turner and S. Sivarajasingam. |
1966 | Shute D.J. D.T.A. Thesis, University of the West Indies. (Cited by A. Ognjanovic, 1974). |
1984 |
Sivarajasingam S., Burnside, E.B., Schaeffer L.R. and Wilton J.W. J. Dairy Sci. 67: 3008-3014. |
1962 | Singh S.B. and Desai R.N. Indian Vet. J. 39: 332-343. |
1978 |
Songprasert J. and Niempus P. Buffalo Bull. Kasetsart University, Bangkok. (Cited in Chantalakhana, 1981.) |
1978 | Sreedhran S. and Nagarcenkar R. 20th Int. Dairy Congr., Paris, France. |
1980 | Thamothanam M. Interim Report, Workshop on Water Buffalo Research in Sri Lanka, University of Peradeniya, Sri Lanka. |
1980 | Tilakaratne N. Interim Report, Workshop on Water Buffalo Research in Sri Lanka, University of Peradeniya, Sri Lanka. |
1985 |
Tiwana M.S. and Dhillon J.S. 1st World Buffalo Congress, Cairo, Egypt. 2: 343-348. |
1965 | Tomar S.P.S. and Desai R.N. Indian Vet. J. 42: 116-125. |
1967 | Tomar S.P.S. and Desai R.N. Indian Vet. J. 44: 694-701. |
1985 | Vercoe J.E., Frisch J.E., Young B.A. and Bennett I.L. In: Draught Animal Power for Production. Proceeding of an International Workshop, ACIAR. James Cook University. |
1979 |
Wang P.C. In: FAO Animal Production and Health Paper No. 13. FAO, Rome. pp. 152-154. |
1962 | Wijeratne W.V.S. Ceylon Vet. J. 10: 48-49. |
1/Livestock Research Division, MARDI, P.O. Box 12301, General Post Office, 50774 Kuala Lumpur, Malaysia.