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3个山羊品种GDF9基因外显子2多态性检测 被引量:5

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摘要 对山羊生长分化因子9(growth differentiation factor 9,GDF9)基因进行单核苷酸多态性检测,为进一步研究GDF9基因与山羊产羔数的相关性奠定理论基础。根据GDF9基因序列(GenBank:EF 446168),设计3对引物,采用PCR-SSCP技术检测GDF9基因外显子2在高繁殖力山羊品种(济宁青山羊)以及低繁殖力山羊品种(崂山奶山羊、莱芜黑山羊)中的单核苷酸多态性,同时研究该基因对济宁青山羊高繁殖力的影响。引物1和引物3均存在多态性。对于引物1扩增片段,3个山羊品种均检测到AA、AB和BB 3种基因型,测序分析发现外显子2第26 bp处有1个G→A的单碱基突变,但没有引起氨基酸改变;济宁青山羊、莱芜黑山羊和崂山奶山羊A等位基因频率分别为0.891 7,0.812 5,0.290 9;济宁青山羊、莱芜黑山羊和崂山奶山羊B等位基因频率为0.108 3,0.187 5,0.709 1;AA基因型济宁青山羊产羔数最小二乘均值比AB基因型的多0.539只(P<0.01),比BB基因型的多0.629只(P<0.01),但对莱芜黑山羊和崂山奶山羊产羔数没有显著影响(P>0.05)。对于引物3,3个山羊品种均检测到CC、CD和DD 3种基因型,测序分析发现外显子2第795 bp处有1个G→A的单碱基突变并且导致缬氨酸改变为异亮氨酸;济宁青山羊、莱芜黑山羊和崂山奶山羊C等位基因频率分别为0.916 7,0.859 4,0.400 0。济宁青山羊、莱芜黑山羊和崂山奶山羊D等位基因频率分别为0.083 3,0.140 6,0.600 0;CC基因型济宁青山羊产羔数最小二乘均值比CD基因型的多0.568只(P<0.01),比DD基因型的多0.62只(P<0.01),CC基因型莱芜黑山羊产羔数最小二乘均值比CD基因型的多0.344只(P<0.01),比DD基因型的多0.379只(P<0.01),但对崂山奶山羊产羔数没有显著影响(P>0.05)。初步表明,GDF9基因可能是控制济宁青山羊和莱芜黑山羊多胎性能的一个主效基因或是与之存在紧密遗传连锁的分子标记。
出处 《中国草食动物科学》 CAS 2014年第S1期132-136,共5页 China Herbivore Science
基金 山东省现代农业产业技术体系羊产业创新团队项目(SDAIT-09-011-03)
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参考文献3

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共引文献26

同被引文献53

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