甘肃省主要小麦生产品种(系)及抗源材料抗白粉病基因推导分析

选用17个致病力不同的小麦白粉病菌菌系,对64个甘肃省主要生产品种(系)及抗源材料进行了苗期白粉病抗性鉴定,并结合系谱分析推导这些品种(系)所含抗病基因。初步判断陇原932含有Pm5及未知抗病基因;西峰20含有Pm6及未知抗病基因;98保1-2含有Pm8及未知抗病基因;863-13和石7816含有Pm19;天选43等6个品种(系)含有Pm21;兰天13等18个品种(系)对所有供试菌系均表现感病,与其他35个供试品种(系)一致,可能含有未知抗病基因或基因组合。聚类分析支持基因推导结果。

Postulation of Powder Mildew Resistance Genes in 64 Wheat Varieties (Lines) in Gansu Province, China

Combined with pedigree analysis, genes for resistance to powdery mildew (Pm) in 64 wheat varieties (lines) from Gansu Province were analyzed with 17 isolates which had different spectra of pathogenicity in seedling stage. The preliminary results showed that the line Longyuan 932 was postulated to possess Pm5 and unknown resistant genes. The variety Xifeng 20 was postulated to possess Pm6 and unknown resistant genes. The line 98 bao 1-2 was postulated to possess Pm8 and unknown resistant genes. Gene Pm19 was detected in two varieties (lines) 863-13 and Shi 7816. Six varieties (lines) Tianxuan 43, X9610, 95-111-3, Lantian 17, 92R137, and Guinong 22 were postulated to possess Pm21. Eighteen wheat varieties (lines) susceptible to all the tested powdery mildew isolates might possess unidentified genes. Unknown genes were found in other 35 wheat varieties (lines), which resistant types were different from the tested genes. Cluster analysis was in agreement these results.