Fertility of Mongolian female yak inseminated with frozen semen of wild yak

摘要

Wild yak frozen semen, imported form P.R. China, was used in an experiment on artificial insemination (AI) technique in Mongolian female yak to evaluate the conception rate and obtain 1/2-hybrid progenies. Female yak showing natural (n = 20) and synchronised (n = 20) oestrus were inseminated twice at a 12-hour-intervals. The conception rate of cows calculated on the bases of numbers of calves born was 35.0 and 40.0%, respectively, for the 'natural' and synchronised groups.