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碧桃花瓣转录组微卫星特征分析

DOI: 10.3969/j.issn.1000-2006.2015.03.007, PP. 34-38

Keywords: 碧桃,微卫星,ssr,转录组,高通量测序

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Abstract:

为开发碧桃转录组微卫星信息,利用454高通量测序技术,对其花瓣转录组序列进行ssr位点发掘,结果发现含ssr的序列4705条,共得到5668个ssr,平均每3.49kb出现1个ssr。微卫星序列主要以三碱基重复为主,约占总数的42.66%。笔者共发现516种碱基重复基元,所占比例最高的为(ag/ct)n(18.34%),其次是(aag/ctt)n(12.42%)。微卫星多为重复长度小于20bp的短序列,长度大于20bp的微卫星仅占总数的12.13%。研究还发现碧桃花瓣微卫星的频率和长度呈显著负相关(p<0.05),相关系数为-0.246。

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