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贵州白山羊GDF9基因外显子2的多态性研究 被引量:16

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摘要 生长分化因子9(GDF9)是卵母细胞分泌的生长因子,对早期卵泡的生长和分化起重要的调节作用。采用RFLP和SSCP方法检测贵州白山羊GDF9基因外显子2的单核苷酸多态性,结果表明:在所有检测样本中均未发现GDF9基因的FecGH突变;在高繁殖率(3羔以上/胎)母羊和公羊中检测到8个杂合的AB基因型,其中5个为高产的母羊,3个为公羊。碱基序列分析证实GDF9基因编码区第1189bp位点的碱基由G突变为A,该位点位于外显子2中,导致活性肽第79位缬氨酸突变为异亮氨酸(V79I),但在低繁殖率(1~2羔/胎)母羊中没有发现该突变。虽然贵州白山羊GDF9基因中G1189A突变的发生率仅为5%,但该位点编码的氨基酸与FecGH突变(S77F)仅相隔1个氨基酸,因此推测GDF9基因中的G1189A突变可能与贵州白山羊的高繁殖力有关。
出处 《畜牧与兽医》 北大核心 2008年第4期46-48,共3页 Animal Husbandry & Veterinary Medicine
基金 国家自然科学基金项目(30560104)
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参考文献12

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二级参考文献67

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