Genetic evaluation of Surti sires for part and complete lactation milk yield

BACHCHU SINGH; S P TAILOR

doi:10.56093/ijans.v84i7.42126

Authors

BACHCHU SINGH Rajasthan College of Agriculture, Udaipur, Rajasthan 313001 India
S P TAILOR Rajasthan College of Agriculture, Udaipur, Rajasthan 313001 India

https://doi.org/10.56093/ijans.v84i7.42126

Keywords:

Genetic evaluation, Monthly milk yield, Part lactation, Sire, Surti

Abstract

First lactation records (1976–2004) of 554 farm bred Surti buffaloes, sired by 51 bulls maintained at Network Project on Buffaloes Vallabhnagar were utilized. The peak monthly milk yield was attained in second month and thereafter it declined. Period and season of calving and sire had significant effect on all the components of monthly milk yield. The heritability estimates for MMY₃ to MMY₅ were moderate, significant and varied within a narrow range. The genetic and phenotypic correlations of MMY₁ with TMY and 305 FLMY were positive and moderate to high, which were lower than genetic correlations of MMY₂ to MMY₅ with TMY and 305 FLMY. The relative efficiency of selection on the basis of monthly milk yield records from month first to fifth were 0.339, 0.745, 0.782, 0.755 and 0.748 over TMY and 0.450, 0.927, 0.917, 0.897 and 0.847 over 305 FLMY, respectively. The product moment and rank correlations between breeding value of sires for 305 FLMY and part lactation milk yield (MMY₂ and MMY₃) were 0.900,0.936 and 0.881, 0.913respectively.

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