Reproduction and production performance and breeding efficiency of Phule Triveni triple crossbred cows.

摘要

The data pertaining to 420 Phule Triveni crossbred cows of various generations maintained for a period of 29 years (1977-2005) were utilized to study some reproduction traits, production traits and breeding efficiency. The overall least squares means (days) of lactation length, dry period and calving interval were 332.59+or-2.93, 79.06+or-1.89 and 421.61+or-2.93 respectively. The mean breeding efficiency was 92.71+or-0.66 per cent. The effects of generation and period of calving were significant and season of calving and lactation order were non significant on the traits. The calving interval increased gradually with the advancement of generations. However, breeding efficiency showed contrasting trend. The correlations of LL, DP and CI with breeding efficiency were negative and significant (P<0.01).