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日本落叶松咖啡酸-O-甲基转移酶基因LkCOMT的克隆及单核苷酸多态性分析
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Journal Article
日本落叶松咖啡酸-O-甲基转移酶基因LkCOMT的克隆及单核苷酸多态性分析
2013
Overview
依据日本落叶松转录组数据库检测到的咖啡酸-O-甲基转移酶（COMT）基因ESTs序列设计引物，分离得到一个编码该酶的新基因。其cDNA克隆全长为1350bp，包含长度为1092bp的开放阅读框，可编码364个氨基酸残基。序列分析显示，所推导的蛋白质氨基酸序列包含COMT基因5个所特有的保守元件，与海岸松PpCOMT的蛋白质氨基酸序列同源性达94％。在此基础上，利用DnaSP5．0软件对日本落叶松加株基因型个体的LkCOMT序列进行了单核苷酸多样性SNPs分析，共检测到92个SNP位点，SNP发生频率为1／17bp，多样性指数1T，为0．00780。在这些SNPs中，65个属于转换，27个属于颠换。在外显子区域，共检测到58个SNP位点，其中37个为错义突变，21个为同义突变。研究结果为Et本落叶松基因标记辅助育种提供了理论基础。
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