Heritability estimates for milk yield and milk composition traits of crossbred cows.

摘要

This study was conducted to estimate the heritability for milk yield and milk composition, especially under farm and field conditions. Data on 1284 milk samples belonging from 222 animals (102 progenies of Holstein crossbred bulls with superior genetics and 119 crossbreds) which calved between 1995 and 1996 were used in the study. Results revealed that heritability estimates for milk yield was 0.169+or-0.240 and its composition ranged from 0.000-0.326. The heritability estimates for solids not fat percentage, fat yield, total solids yield, and solids not fat yield were 0, 0.114+or-0.242, 0.113+or-0.242 and 0.157+or-0.240, respectively. Milk fat percentage had a comparatively high heritability at 0.326+or-0.234.