GENETIC AND NON-GENETIC FACTORS AFFECTING FIRST LACTATION TEST-DAY MILK YIELD IN MEHSANA BUFFALOES, GUJARAT, INDIA
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 54
Abstract
Data on various FLTDYs and FLY of Mehsana buffaloes were obtained during a period of 20 years (1993 to 2012) to observe the effect of genetic and non-genetic factors on various FLTDYs and FLY. The least squares mean for FLY was found to be 1708.62±32.50 liters. It was significantly (P≤0.05) affected by period of calving. Similarly, the least squares means of various FLTDYs ranged from 3.09±0.11 (FLTDY1) to 7.31±0.13 (FLTDY4) liters and were greatly (P≤0.05) influenced by the period of calvingexcept FLTDY5 and FLTDY9. Low to high heritability estimates (ranging from 0.05 for FLTDY5 to 0.85 for FLTDY1) were obtained in the present study. Further, the genetic correlations between FLY and FLTDYs ranged from moderate to high (0.28 to 0.98) whereas, the phenotypic correlations between these traits were found to be ranged from low to high (0.08 to 0.69). The high genetic correlations between FLTDYs (FLTDY2, FLTDY3, FLTDY9 and FLTDY10) and FLY implies that these test-day yields can very well be used as the criteria for selection of Mehsana buffaloes during its early lactation.
Authors and Affiliations
NIRALI S. GALSAR
Keywords
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