菌物学报2026，Vol.45Issue(9)：69-80,12.DOI:10.13346/j.mycosystema.260061
泛喜马拉雅地区条形柄锈菌小麦专化型毒性多样性
Virulence diversity of Puccinia striiformis f.sp.tritici in the Pan-Himalayan region
摘要
Abstract
To clarify the virulence structure of Puccinia striiformis f.sp.tritici(Pst)in the Pan-Himalayan region,a total of 297 isolates was collected during 2024-2025 from China(Xizang,Yunnan,and Qinghai),as well as India,Pakistan,Afghanistan,and Nepal.These isolates were purified and characterized using wheat near-isogenic lines carrying different Yr resistance genes for physiological race identification and virulence phenotype diversity analysis.In total,35 known physiological races and 82 previously unreported races were identified,of which PSTv-076 was the predominant race,accounting for 18.52%of the isolates.Among all tested isolates,virulence frequency was highest to Yr6(96.63%),whereas no isolate virulent to Yr5 was detected.Virulence diversity analysis showed that the China(eastern Xizang)population(G5)exhibited the highest values for all diversity indices.In contrast,the Afghanistan population(G1)had the lowest Nei's diversity index(Hs)and Kosman index(K),the India-Nepal-China(western Xizang)population(G2)showed the lowest values for Simpson index(Si),normalized Shannon index(Sh),Stoddart index(St),Shannon index(SH),and richness(E),and the Pakistan population(G3)had the lowest Gleason index(G).Cluster analysis based on virulence phenotypes revealed that the China(Qinghai)population(G4)was the most distinct and formed an independent cluster,whereas the remaining five populations grouped into another major cluster.Within this cluster,the Afghanistan(G1),India-Nepal-China(western Xizang)(G2),and Pakistan(G3)populations showed highly similar virulence structures and formed a subcluster,while the China(eastern Xizang)(G5)and China(Yunnan)(G6)populations were successively clustered on the periphery.These findings elucidate the physiological race composition and virulence structure of Pst populations in the Pan-Himalayan region and provide a theoretical basis for the rational deployment of wheat cultivars carrying effective resistance genes in this area.关键词
条形柄锈菌小麦专化型/毒性多样性/生理小种/喜马拉雅Key words
Puccinia striiformis f.sp.tritici/virulence diversity/physiological race/Himalaya引用本文复制引用
王梦冉,侯苍宇,UMER Basu,王玉虎,李宇翔,高海峰,胡小平..泛喜马拉雅地区条形柄锈菌小麦专化型毒性多样性[J].菌物学报,2026,45(9):69-80,12.基金项目
国家自然科学基金(32502448,31471731) （32502448,31471731）
国家小麦产业技术体系岗位科学家项目(CARS-03-37) This work was supported by the National Natural Science Foundation of China(32502448,31471731)and the National Wheat Industry Technology System Post Scientist Project(CARS-03-37). （CARS-03-37）
