中文摘要：

H9020-20-12-1-8是一个通过杂交和回交选育的普通小麦（Triticum aestivum L.）华山新麦草（Psathyrostachys huashanica Keng.）易位系,苗期对中国小麦生产上流行的条锈菌（Puccinia striiforms f.sp.tritici）生理小种CYR32表现良好抗性。遗传分析表明,H9020-20-12-1-8对CYR32的抗病性是由1对显性基因YrHy（暂命名）独立控制的,通过对H9020-20-12-1-8和感病品种铭贤169杂交F2分离群体进行SSR分子标记,从305对SSR引物组合中筛选到3个与抗病基因YrHy紧密连锁的微卫星标记Xgwm429、Xwgm770和Xwmc154,与YrHy的遗传距离分别为5.4、6.4和11.3cM,将YrHy定位于小麦2BS染色体上。系谱分析及分子检测等结果表明,YrHy是一个源于华山新麦草的新抗条锈病基因。

英文摘要：

The wheat accession H9020-20-12-1-8 is a translocation line previously derived from hybridization and backcross between common wheat （Triticum aestivum L.） and Psathyrostachys huashanica Keng.It shows excellent resistance to the dominant races （CYR32） of Puccinia striiform f.sp.tritici prevalent in China at seedlings.The genetic analysis showed that H9020-20-12-1-8 had one dominant gene to CYR32.The resistance gene temporarily was designated as YrHy.A 248 individuals of F2 segregating population derived from H9020-20-12-1-8 and a susceptible wheat line Mingxian 169 was mapped using simple sequence repeat （SSR） markers,three of the 305 SSR markers on 2BS （Xgwm429,Xwgm770 and Xwmc154） were selected and linked with YrHy and with a distance of 5.4,6.4 and 11.3 cM,respectively.YrHy is a novel resistance gene to wheat stripe rust donated from P.huashanica Keng on the basis of pedigree analysis and molecular results.