山东省不同年代小麦推广品种遗传多样性的AFLP分析

被引：9

作者：

赵亮

田纪春

机构：

[1] 山东农业大学作物生物学国家重点实验室,小麦品质育种室

来源：

分子植物育种 | 2007年 / 03期

关键词：

山东省; 小麦; AFLP; 遗传多样性;

D O I：

暂无

中图分类号：

S512.1 [小麦];

学科分类号：

0901 ;

摘要：

利用14对AFLP(amplified fragment length polymorphism)引物组合对92份山东省不同年代小麦推广品种遗传多样性进行分析。结果表明,每对引物组合的平均多态性位点为20.07,多态位点百分率为30.06,在筛选引物时发现引物MseⅠ+TAG与PstⅠ组合时大部分能够表现出较好的多态性;92份材料的遗传相似系数(Dice)分布在0.93～0.997之间,平均为0.952,说明山东省小麦遗传多样性的水平低。根据材料间的相似系数,按UPGMA聚类法对92份材料聚类分析,可以把92份材料分为6类。值得注意的是紫色麦自成一类。20世纪50年代至今山东省小麦推广品种的遗传多样性指数变化趋势:从20世纪50年代到80年代,品种材料的遗传多样性指数逐渐增加,20世纪80年代达到最高,此后则有所下降,到区试材料(2)时遗传多样性指数又有所上升,但是幅度不大。从总体来看,山东省不同年代选育的小麦品种的遗传多样性差异较小,也没有因为育种而导致当地小麦品种的遗传多样性下降。

引用

页码：403 / 411

页数：9

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