草棉EST-SSRs的遗传评价

被引:7
作者
余渝 [1 ,2 ]
王志伟 [1 ]
冯常辉 [1 ]
张艳欣 [1 ]
林忠旭 [1 ]
张献龙 [1 ]
机构
[1] 华中农业大学作物遗传改良国家重点实验室
[2] 新疆农垦科学院棉花所
关键词
草棉; 表达序列标签; 简单序列重复; 多态性信息含量; 遗传作图;
D O I
暂无
中图分类号
S562 [棉];
学科分类号
0901 ;
摘要
根据GenBank中公布的247条草棉EST序列,搜索SSR并进行引物设计。其中的25条序列含有27个SSR,1~6碱基重复类型都存在,二碱基和三碱基重复的频率较高。为了明确在A、D和AD基因组中的可转移性,依据25条序列共设计25对EST-SSR引物,其中22对引物扩增出清晰可辨的DNA条带,产生92个多态性片段,平均每对引物产生3.64个多态性片段。引物的多态性信息含量(PIC)在0.49~0.91之间,平均为0.81。6对引物在BC1种间作图群体[(鄂棉22×Pima3-79)×鄂棉22]中表现多态性,产生7个多态性位点,其中5个为共显性,2个为显性。除HAU230b标记在BC1分离群体中不符合孟德尔式分离比例,其余引物表现正常分离。6个位点被整合到陆地棉和海岛棉种间BC1遗传连锁图谱上的6条染色体:有4个位于A亚基因组的4条染色体上(Chr.6、10、11和12),2个位于D亚基因组的2条染色体(Chr.19和20)。
引用
收藏
页码:2085 / 2091
页数:7
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