Estimates of Genetic and Phenotypic Parameters for Milk Yield and Reproduction Traits in Karan-Fries Cattle

Author: Aakanksha Rathore Ramesh Kumar Singh and Avtar Singh

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Abstract

The records of 1481 Karan-Fries cows on first lactation data of production and reproduction traits, progenies of 82 sires were utilized to estimate the heritability, genetic and phenotypic correlations among these traits. The heritabilities for FL305MY, PY305MY, 180DMY, AFC and FSP traits were 0.346 ± 0.10, 0.271 ± 0.094, 0.343 ± 0.101, 0.546 ± 0.131 and 0.064 ± 0.07 respectively. The moderate to high heritability estimates of milk yield and AFC traits indicated ample scope of their genetic improvement through selection and breeding. The heritability of FSP trait was estimated low in magnitude which indicated that the improvement in FSP may be achieved by providing better managemental practices. The phenotypic (rp) and genetic (rg) correlations among FL305MY, PY305MY and 180DMY traits were of high magnitude, positive and highly significant. It had indicated close association among them and the predicted and part lactation milk yield traits can be used for animal evaluation in fiel

Keywords

Parameters, milk yield, reproduction trait, Karan-Fries cattle