THE PHILIPPINE WATER BUFFALO
THE PHILIPPINE WATER BUFFALO
THE PHILIPPINE WATER BUFFALO
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Ravi was at the top. The heterosis estimation for growth at<br />
maturity and milk production were about 5%. It was also<br />
found out that based on genetic correlations of body weights<br />
at 12 and 16 months, selection at 18 th -month body weight<br />
was better than at 12 th month.<br />
Keywords: Philippine carabao, Murrah buffalo,<br />
crossbreeds, genetic evaluation, body weight and<br />
measurements<br />
*Abstracts of Completed Studies, 1981-1996, PCC-UPLB,<br />
College, Laguna.<br />
B-36<br />
<strong>THE</strong> CYTOLOGY OF SWAMP AND RIVER TYPES<br />
OF <strong>WATER</strong> <strong>BUFFALO</strong>ES AND <strong>THE</strong>IR HYBRIDS*<br />
S. Songsri, Ph.D. Student, DBS-CA, UPLB<br />
D. A. Ramirez, Professor, DBS-CA, UPLB<br />
The chromosomes of two major types of water buffaloes,<br />
namely river type (Murrah Buffaloes) and swamp type<br />
(carabaos) and of their hybrids were analyzed. The diploid<br />
chromosome number of the carabao consists of 2n=48<br />
chromosomes of which 6 are metacentric, 4 submetacentric,<br />
and the rest including the sex chromosomes, acrocentric.<br />
The Murrah buffalo has 2n=50 chromosomes of which 4<br />
are metacentric, 6 submetacentric, and the rest acrocentric.<br />
The F1 and the BC1 (carabao) hybrids have 2n=49<br />
chromosomes and the smallest acrocentric chromosomes<br />
(Chromosome 24) is unpaired. In each type of water<br />
buffaloes, the X-chromosome is the largest acrocentric.<br />
The Y-chromosome is also acrocentric. The morphological<br />
characteristics of the chromosomes of the Murrah buffalo<br />
and the carabao and the carabao are very similar except<br />
for chromosome 1 which is metacentric and longer in the<br />
carabao, and is submetacentric and shorter in the Murrah<br />
buffalo. The differences in the chromosome 1 of the carabao<br />
(swamp type) and the Murrah Buffalo (river type) are<br />
further proofs supporting (Castillo’s proposal for the<br />
classification of carabao as Bubalus carabenensis Linn).<br />
Keywords: cytology of water buffalo, hybrid water buffalo,<br />
river type buffalo, swamp type water buffalo<br />
*Philippine Agriculturist, 62(4):262-275. Also in Annotated<br />
Bibliography on Philippine Biodiversity: Livestock and Poultry<br />
(Agrobiodiversity) 1949-1997, Carabaos (2002) p. 249<br />
B-37<br />
WI<strong>THE</strong>R HEIGHT, BODY LENGTH, AND HEART<br />
GIRTH DEVELOPMENT OF <strong>PHILIPPINE</strong> CARABAO<br />
AND ITS F 1 CROSSES UNDER RANCH<br />
CONDITIONS*<br />
BREEDING AND GENETICS<br />
M. S. Suba, Professor, DAS-CA, CLSU<br />
F. M. Mamuad, Associate Professor, DAS-CA, CLSU<br />
H. V. Venturina, Science Research Specialist, PCRDC-PCARRD, CLSU<br />
P. G Duran, Science Research Specialist, PCRDC-PCARRD, CLSU<br />
V. L. Mamuad, Science Research Assistant, PCRDC-PCARRD, CLSU<br />
M. Pineda, Science Research Aide, PCRDC-PCARRD, CLSU<br />
Structural parameters of 109 PCs and its F1 crosses with<br />
MB, Nili-Ravi (NR) and Thai Swamp Buffalo (TB) were<br />
analyzed to determine their performance during their first<br />
two years of development. Structural parameters studied<br />
were wither height, body length, body length and heart<br />
girth. NR x PC and MB x PC crosses tended to be taller<br />
(P
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