关键词: 条锈病抗性, 遗传多样性, 四川小麦地方品种, 元分析, 关联分析

Abstract: [Objective] The purpose of this study was to reveal genetic diversity of the resistance to stripe rust among Sichuan wheat landraces by using SSR molecular markers in the regions of the consensus QTLs of wheat adult-plant resistance to stripe rust and combining with identification of the resistant phenotypes in field.[Method] The consensus QTL about wheat adult-plant resistance to stripe rust was found by a meta-analysis method and consensus map of these loci was constructed.The genetic diversity of the resistance to stripe rust among 64 Sichuan wheat landraces was revealed by using SSR molecular markers in the regions and combining with identification of the resistant phenotypes in field.[Results] Seven consensus MQTLs for wheat adult-plant resistance to stripe rust were identified by a meta-analysis method.11 Sichuan wheat landraces varieties showed immunity or nearly immunity,and which disease severity,incidence and disease index were all lower than 10% when adult-plant resistance to stripe rust were investigated by mixed physiological race.Marker-trait association analysis identified that three SSR loci were detected significant correlation with the trait of adult-plant resistance to stripe rust among Sichuan wheat landraces.[Conclusion] Significant differences of adult-plant resistance to stripe rust among Sichuan wheat landraces was found.SSR loci detected significant correlation with the trait of adult-plant resistance to stripe rust among Sichuan wheat landraces are helpful for exploring the resistant genes of Sichuan wheat landraces and providing molecular assistant selected (MAS).

Key words: resistance to stripe rust, genetic diversity, Sichuan wheat landraces, meta-analysis method, association analysis