数字农科院2.0

基于茶树EST-SNP的CAPS标记开发

文献类型： 中文期刊

作者： 张成才;王丽鸳;韦康;成浩

作者机构：

关键词： 茶树;EST;SNP;CAPS;遗传多态性

期刊名称：分子植物育种

ISSN： 1672-416X

年卷期： 2013 年 06 期

页码： 163-170

收录情况： CSCD

摘要： 为了促进SNP技术在茶树遗传育种中的应用,本文探讨了将茶树SNPs转化成CAPS标记进行检测的可行性。首先,对从茶树ESTs中挖掘的候选SNPs进行重测序验证;然后,对确证的SNPs进行限制性内切酶识别位点分析,筛选出引起酶切识别位点改变的SNPs;使用相应的引物从茶树基因组中扩增这些SNPs所在的片段,然后对扩增产物进行酶切和电泳检测,将SNPs转化为CAPS标记;最后,随机选择了14个CAPS标记,在25个茶树品种中进行多态性分析,以验证标记的可用性。结果,经重测序验证,在8个茶树品种中共检测到162个SNPs;将39个SNPs成功转化为CAPS标记;在14个随机选择的CAPS标记中有13个在25个品种中表现出多态性,多态性信息含量(PIC)介于0.043和0.497之间,平均0.311;另外1个标记在25个品种中均为杂合。结果表明,本文构建的将茶树SNPs转化为CAPS标记的方法,可以方便地用于茶树SNPs的检测;该方法能够促进SNP技术在茶树遗传育种研究中的应用;同时,本文报道的39个CAPS标记可以用于茶树遗传多态性检测和茶树遗传图谱构建等方面的研究。

分类号： S571.1

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