普通小麦-华山新麦草易位系H9020-1-6-8-3抗条锈病基因的遗传分析和SSR标记

Genetic analysis and molecular mapping of stripe rust resistance of wheat translocation line H9020-1-6-8-3 derived from Psathyrostachys huashanica Keng

It have proved that wheat translocation line H9020-1-6-8-3 derived from Psathyrostachys huashanica Keng is an important resistant resource to stripe rust.To confirm the existence of resistant genes,it was crossed with susceptible cultivar MingXian 169 as male and female parent,respectively.Seedlings of parents and F2 progeny were tested for resistance to selected CY29 of races of Puccinia striiformis f.sp.tritici from China.H9020-1-6-8-3 had one dominant resistant gene which temporarily named YrHs,whatever it was male or female parent.By using BSA method,two markers,Xgwm261 and Xgwm455 located on 2DL were found.The distance to YrHs were 4.3 and 5.8 cM respectively.The result could be used in molecular-assisted breeding.

It have proved that wheat translocation line H9020-1-643-3 derived from Psathyrostachys huashanica Keng is an important resistant resource to stripe rust. To confirm the existence of resistant genes, it was crossed with susceptible cultivar MingXian 169 as male and female parent, respectively. Seedlings of parents and F2 progeny were tested for resistance to selected CY29 of races of Puccinia striiformis f. sp. tritici from China. H9020-1-643-3 had one dominant resistant gene which temporarily named YrHs, whatever it was male or female parent. By using BSA method, two markers, Xgwm261 and Xgwm455 located on 2DL were found. The distance to YrHs were 4.3 and 5.8 cM respectively. The result could be used in molecularassisted breeding.