Department of Animal Resources, Directorate of Baghdad Agriculture, Ministry of Agriculture, Iraq

Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen.

Published in Open Veterinary Journal

A total of 956 lactation records of Holstein cows kept at Kaa Albon station, Imuran Governorate, Yemen during the period from 1991 to 2003 were used to investigate the effect of some genetic and non-genetic factors (Sire, parity, season of calving, year of calving and age at first calving as covariate) on the Total Milk Yield (TMY), Lactation Lengt...