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小麦高亲和性钾转运蛋白基因(HKT1)多样性分析与染色体定位

DOI: 10.7668/hbnxb.2015.05.001, PP. 1-6

Keywords: 小麦,HKT1,基因多样性,基因驯化

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Abstract:

为了研究HKT1在普通小麦及其野生近缘种中的自然多样性,揭示HKT1结构与功能的关系,采用克隆测序的方法对38份普通小麦和13份小麦野生近缘种HKT1基因组序列进行了分析。在38份普通小麦材料中共发现5种HKT1序列,分别命名为HKT1-1~HKT1-5,其中29份材料仅含有1种类型HKT1。而在13份小麦野生近缘种中发现19种HKT1,其中根据HKT1基因组序列预测13种有完整读码框。普通六倍体小麦的核苷酸多样性仅相当于其野生近缘种的23.8%。这些结果表明,HKT1在小麦基因组中属于多拷贝基因,HKT1在栽培驯化过程中受到了选择,属于驯化基因。利用中国春小麦缺四体和W7984×Opata85作图群体,将HKT1基因定位于7B染色体长臂。

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