小尾寒羊多胎性能候选基因的研究进展

小尾寒羊具有常年发情、性成熟早和多胎性能的高繁殖力特性,平均每胎产羔2.6只,是我国优良的地方绵羊品种,也是我国独特的遗传资源。目前在BooroolaMerino羊、Inverdale羊和Hanna羊中已找到影响多胎性能的主基因,但国内对小尾寒羊多胎性能遗传机制的研究主要集中在常规的选育和分子标记方面,也有一些以候选基因法从分子水平上对小尾寒羊多胎机制进行研究,仍没有确立控制小尾寒羊高繁特性的主效基因,本文就其研究现状进行综述,为小尾寒羊主效基因的研究提供有益的参考。

The Progress of Candidate Genes for Fecundity in Small Tail Han Sheep

Small Tail Han Sheep is an excellent local sheep breed in China .Small Tail Han Sheep had significant characteristics of non-seasonal estrus and high p rolificacy, and the lambing percentage averaged 260 percent in it. At present, we have find out the fecundity genes of Booroola Merino, Inverdale and Hanna ,but the study of genetic fecundity is mostly based on routine selected breedin g and molecular markers in Small Tail Han Sheep, some had studied Small Tail Ha n Sheep using the method of candidate genes also. But all of these did not estab lish the major gene that controls the high prolificacy of Small Tail Han Sheep, so we now summarize the condition in order to provide reference for the study o f Small Tail Han Sheep.