Abstract: Bull sperm quality is relative on not only breeding level but also genetic base. The bulls which are feeble sperm and no sperm badly affect the economic benefit of the raisers. To know the genetic mechanism of sperm quality and produce high quality sperm, spermatogenesis course was studied through some genes. Some genes and gene families which were involved in differential cell differentiation course were introduced, including tsMCAK, Mina 53 and TLF gene, and so on. Further more, the progress of the transfer factor gene, cell cycle genes, original cancer gene and cell languish gene on spermatogenesis were discussed. This paper aims to offer some referenced information for these workers which engage in this field and discuss to how to study the genetic base of the sperm quality in the future.

Key words: sperm quality; testicle; gene expression