华北农学报2012，Vol.27Issue(5)：38-43,6.
小尾寒羊BMPR-IB基因FecB突变与产羔数和生长发育关系的研究
FecB Mutation of BMPR-IB Gene and Its Association with Litter Size and Growth Traits in Small Tailed Han Sheep
摘要
Abstract
The blood sampl'es of Small Tailed Han sheep reared in Beijing suburb area and the nucleus flock with high fecundity of Small Tailed Han sheep were collected to detect the FecB mutation of BMPR-IB gene by PCR-RFLP and analysis the effects of different BMPR-IB genotypes on litter size of the ewes in the two flocks as well as the effects of different genotypes on growth and development in offspring of the nucleus flock. The results showed that genotype frequencies of BB ,B + and + + of BMPR-IB gene was 0. 34 ,0. 56 and 0. 10 in Small Tailed Han sheep reared in Beijing suburb area,respectively,and was 0. 47 ,0. 48 and 0. 05 in the core group with high fecundity Respectively. The litter size of Small Tail Han sheep reared in Beijing suburb area with BB,B + and + + genotypes was 2. 72 ,2. 16 and 1. 74 , while litter size of ewes with BB ,B + and + + genotypes in core group was 3. 20 , 2.57 and 2. 07 , respectively. Before 90 days, average daily gain ( ADG ) of the lambs with different genotypes reached a maximum,especially in lambs with B + genotype. After 120 days, the growth rate of lambs with different genotypes showed no significant difference. Concerning the body size index, the growth of body length and chest circumference were more than body height in female lambs with B + genotype which showed better growth potential. These results suggested that BMPR-IB gene was the major gene affecting litter size in Small Tail Han sheep, and was no obvious influences on growth and development. The Fee mutation could be used to breed new strain of Small Tailed Han sheep with super prolificacy, as well as to breed new sheep breeds with high prolificacy and in mutton production.关键词
小尾寒羊/BMPR-IB基因/产羔数/生长发育Key words
Small Tailed Han sheep/BMPR-IB gene/Litter size/Growth and development分类
农业科技引用本文复制引用
杨宇泽,冯涛,储明星,云鹏,肖炜,薛振华,张进涛,孟丹娜..小尾寒羊BMPR-IB基因FecB突变与产羔数和生长发育关系的研究[J].华北农学报,2012,27(5):38-43,6.基金项目
北京市农业局科技新星项目(200903-13) （200903-13）
