›› 2018, Vol. 45 ›› Issue (4): 970-976.doi: 10.16431/j.cnki.1671-7236.2018.04.017

Previous Articles     Next Articles

Genetic Polymorphism of BMPR-1B Gene in Six Sheep Breeds

WU Cuiling1,2, ZONG Xinglong1,2, ZHAO Zhuo2, ZHAO Yunhui2, ZHAI Bo2, ZHANG Mingxin2, WANG Chunxin2   

  1. 1. Jilin Agricultural University, Changchun 130000, China;
    2. Jilin Academy of Agricultural Sciences, Gongzhuling 136100, China
  • Received:2017-10-12 Online:2018-04-20 Published:2018-04-25

Abstract:

The study was aimed to analyze the gene polymorphism of bone morphogenetic protein receptor-1B (BMPR-1B) gene in six sheep population,which would provide a theoretical basis for marker-assisted selection and breeding for prolificacy in sheep.The blood samples of a total of 381 individuals from six sheep breeds (Xinji Fine wool sheep,Northeast Fine wool sheep,Chinese Merino (Mulley type) sheep,Dorper×Han crossbred sheep (F1),Dorper×Han crossbred sheep (F3) and White Dorper sheep) were used to study the polymorphism of BMPR-1B gene by PCR-RFLP.Secondary structures of proteins were predicted using DNAStar,gene frequency,genotype frequency,Hardy-Weinberg equilibrium and genetic diversity parameters (heterozygosity (He),homozygous (Ho),effective allele (Ne),polymorphic information content (PIC)) were calculated by Excel 2003 software.The results showed that there were no polymorphism in Xinji Fine wool sheep,Northeast Fine wool sheep,Chinese Merino (Mulley type) sheep and White Dorper sheep.The polymorphism in Dorper×Han crossbred sheep (F1) and Dorper×Han crossbred sheep (F3) existed three kind of genotypes (++,B+ and BB).According to χ2 text,Dorper×Han crossbred sheep (F1) were not in Hardy-weinberg equilibrium,and Dorper×Han crossbred sheep (F3) were in Hardy-weinberg equilibrium.The PIC were 0.311 and 0.264 in the Dorper×Han crossbred sheep (F1) and Dorper×Han crossbred sheep (F3),which both meaned moderate diversity.The BMPR-1B gene might be a major gene which affected the prolificacy trait of Dorper×Han crossbred sheep (F1) and Dorper×Han crossbred sheep (F3).

Key words: sheep; BMPR-1B gene; polymorphism

CLC Number: