Bull-specific effect on fertilization rate and viable embryo recovery in the superovulated buffalo (Bubalus bubalis)

摘要

Frozen-thawed semen from 5 fertile buffalo bulls with similar post-thaw progressive motility and sperm morphology was used to inseminate 64 buffaloes at superovulatory oestrus. Fertilization and viable embryo recovery rates differed among bulls, butthis bull-specific effect was not related to the overall herd fertility rate as determined by artificial insemination in normal cyclic animals. It is concluded that individual bulls differ in their contribution to fertilization of superovulated donors and also to embryonic development, and that buffalo bulls can be screened for optimal fertility and embryo recovery rates in superovulated donors.