Estimates of Genetic and Phenotypic Parameters for Milk Yield and Milk Composition 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, progenies of 82 sires and the records of 934 Karan-Fries cows on milk composition traits, progenies of 64 sires were utilized to estimate the heritability, genetic and phenotypic correlations among these traits. The genetic and phenotypic parameters of milk yield along with milk composition traits is required to plan the profitable dairying. The data for milk yield and milk composition traits was gathered from records of various registers for each animal under study. The heritabilities for FL305MY, PY305MY, 180DMY, fat yield, fat (%), SNF yield and SNF (%) traits were 0.346 ± 0.10, 0.271 ± 0.09, 0.343 ± 0.10, 0.636 ± 0.15, 0.181 ± 0.11, 0.485 ± 0.14 and 0.360 ± 0.13, respectively. The moderate to high heritability estimates of milk yield and milk composition traits indicated ample scope of their genetic improvement through selection and breeding. The phenotypic (rp) and genetic (rg) correlations among FL

Keywords

Parameters, Milk yield, Milk Composition, Karan-Fries cattle.