International Journal of Agriculture Extension and Social Development

author(s)
Sandeep Kumar Sangwan, Surander Singh Dhaka, Mahavir Chaudhari and Vikram Jakhar

abstract
This study investigates the genetic and phenotypic correlations between various production performance and reproduction traits in Hardhenu cattle. Using data of 341 Hardhenu cows from a well-maintained cattle breeding farm, LUVAS, Hisar, the progeny of 51 sires; calved during the year 1995-2018. Data on milk production and reproductive traits were collected from history cum pedigree sheets. Traits analyzed include first lactation standard milk yield, first lactation peak milk yield, first lactation average milk yield, first lactation milk yield per day of first calving interval, and first lactation milk yield per day of age at second calving. Reproductive traits such as first service period, first dry period, first calving interval, and the number of artificial inseminations (AI) for first and second conception were also examined. The results reveal significant genetic correlations, offering valuable insights into the interplay between milk production and reproductive efficiency. The results reveal significant phenotypic correlations, providing valuable insights into the relationships between milk production and reproductive efficiency. These findings are essential for developing effective breeding programs aimed at enhancing both production and reproductive performance in Hardhenu cattle.