单 位：
河北省畜牧兽医研究所;河北农业大学动物科技学院
关键词：
寒泊肉羊;BMPR1B基因;产羔数;产羔间隔;初产日龄;基因型频率;基因频率
摘 要：
为了探讨BMPR1B(A746G)基因在寒泊肉羊世代选育中的遗传变异及其与产羔数的关系,本试验分析了不同选育世代寒泊肉羊BMPR1B基因型和基因频率,基因型对不同世代母羊产羔数的影响。结果表明BMPR1B基因突变纯合型BB个体从第一世代就开始出现,BB基因型频率随选育世代增加呈现增加趋势,从G1到G2世代,BB基因型频率显著增加。G1世代B+基因型母羊产羔数高于++基因型,但差异不显著。G2世代BB基因型母羊产羔数达到3.0,显著大于B+(1.89)和++(1.24)基因型个体(P<0.01)。G1和G2世代BMPR1B基因型母羊对初产日龄和产羔间隔均无显著影响(P>0.05)。结果提示BMPR1B基因作为分子标记可显著提高寒泊肉羊新种群母羊产羔数。
译 名：
Association of BMPR1B gene with litter size trait and genetic variations in different generations of Hanper mutton sheep
作 者：
CHEN Xiao-yong;SUN Hong-xin;TIAN Shu-jun;DUN Wei-tao;Institute of Animal Science and Veterinary of Hebei Province;College of Animal Science and Technology,Agricultural University of Hebei;
关键词：
Hanper mutton sheep;;BMPR1Bgene;;litter size;;birthing interval;;first birthing age;;genotypic frequency;;genic frequency
摘 要：
The aim of this study was to research the variation of BMPR1B(A746G)gene during generation selection and its association with litter size of Hanper mutton sheep.We analyzed the genotypic and genic frequency of BMPR1 Bgene,and the effects of genotypes on litter size of ewes during different selection generations.The results indicated that the individuals of BB genotype homozygotes appeared in the first generation,and BB genotype and genic frequency increased with selected generations.The litter size of ewes with B+genotype was greater than that of ewes with+ +genotype insignificantly in the first generation(G1)(P>0.05),however,the litter size of BB ewe was 3.0,which was higher than those of B+(1.89)and++(1.24)in the second generation(G2)remarkably(P(<0.01).There was no effect of BMPR1 Bgenotype on the first birthing age and birthing interval in G1 and G2(P>0.05).The a-bove results demonstrated that BMPR1 Bgene increased the litter size of ewes from new flock Hanper mutton sheep as molecular marker.
