黄淮麦区以1B/1R类品种为抗源主要育成小麦品种的遗传多样性分析

Genetic Diversity of Yellow-huai River Zone Wheat Varieties Which Originated from 1B/1R by SSR

采用SSR技术对黄淮麦区以1B／1R类品种为抗源育成的38个小麦品种进行聚类分析。39个SSR引物共扩增出186条谱带，其中143务为多态性条带，占76．9％。每个引物可扩增出1～9条多态性条带，平均3．7条。位点多态性信息含量PIC变幅为0．320-0．857，平均为0．634。聚类分析表明，在遗传距离GD值0．32水平上38个小麦品种可聚成六大类。品种间遗传距离GD变幅为0．10769～0．48571。SSR标记揭示出这38个具有黑麦血缘的小麦品种遗传变异较小，遗传基础比较狭窄。

The genetic relationships among 38 wheat cultivars, which were derived from 1B/1R in the Yellow-Huai River Zone,were investigated by SSR. The results showed that 39 SSR primers produced 186 distinctive bands in total and 143 of them were polymorphic, accounted for 76.9 %. Each primer amplified 1 to 9 polymorphic bands with the average of 3.7. The value of a11elic polymorphism information content （PIC） ranged from 0. 320 to 0. 857 on an average of 0. 634 per primer. At the level of GD 0.32, cluster analysis showed that 38 wheat lines could be classified into 6 groups. The GD varied from 0. 10769 to 0. 48571. The results indicated that lower genetic diversity and narrow genetic basis were presented in the 38 wheat cultivars.