【摘 要】
：
本研究利用PCR和克隆测序方法,克隆新狼山鸡和仙居鸡MHC B-G基因全序列,分析序列的多态性并预测其蛋白质的结构与功能,为更好地保护地方鸡种提供基础资料.结果表明:分别获得
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本研究利用PCR和克隆测序方法,克隆新狼山鸡和仙居鸡MHC B-G基因全序列,分析序列的多态性并预测其蛋白质的结构与功能,为更好地保护地方鸡种提供基础资料.结果表明:分别获得新狼山鸡和仙居鸡MHCB-G基因6 183 bp和6 415 bp全序列,与红色原鸡同源性达98％,3鸡种存在148个变异位点,为3个单倍型,单倍型多样度为0.07407,仙居鸡在4413-4661位置缺失249 bp;利用生物信息学预测新狼山鸡和仙居鸡MHCB-G蛋白,该蛋白具有丰富的B细胞抗原位点;新狼山鸡和仙居鸡有明显的跨膜螺旋结构,分别含有138个和98个磷酸化位点;MHC B-G基因具有丰富的遗传多样性,该MHC B-G蛋白可能是抗原位点的富集区,对其进化、抗原递呈作用以及疾病和生产性能的相关性发生重要影响.
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