Data on 2107 Murrah buffaloes maintained at 4 military dairy farms and 3 UP State Government farms during 1961-88, were used to estimate heritabilities, genetic and phenotypic correlations between early and lifetime performance traits. Model used for estimation of sire and residual (co)variance components included year-season of first calving and farm as fixed effects, sires within farms as random effect. The heritability of first lactation milk yield was 0.23. The ranges of heritability estimates for lifetime performance traits were 0.05 to 0.19 with lowest for lifetime number of services per conception and highest for milk yield per day of herd life. Genetic and phenotypic correlations among lifetime performance traits ranged from -0.31 to 0.93. First lactation milk yield was genetically highly correlated with lifetime milk yield. Lifetime days open was negatively correlated with milk yield per day of herd life. High genetic correlation of first lactation milk yield with lifetime milk yield suggest that selection on first lactation milk yield seems to be desirable to increase lifetime milk yield.

K. L Raheja

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 24: Sheep and goats (fibre); sheep and goats (meat and milk); poultry; horses; buffaloes., , 463–466, 1998
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