青海和甘肃两省小麦条锈菌越夏菌源群体毒性多样性分析  

Virulence Diversity of the Over-summering Population ofPuccinia striiformis f. sp. tritici in Qinghai and Gansu Provinces

作　　者：周小妹 严浩浩 高威正 闫佳会 侯璐 康振生[2] 姚强 ZHOU Xiaomei;YAN Haohao;GAO Weizheng;YAN Jiahui;HOU Lu;KANG Zhensheng;YAO Qiang(Qinghai Provincial Key Laboratory of Integrated Management of Agricultural Pests,Academy of Agricultural and Forestry Sciences,Qinghai University,Xining 810016,China;State Key Laboratory of Crop Stress Resistance and High-Efficiency Production,College of Plant Protection,Northwest A&F University,Yangling,Shaanxi 712100,China)

机构地区：[1]青海大学农林科学院,青海省农业有害生物综合治理重点实验室,西宁810016 [2]西北农林科技大学植物保护学院,作物逆境与高效生产全国重点实验室,陕西杨凌712100

出　　处：《植物医学》2025年第2期12-22,共11页Plant Health and Medicine

基　　金：国家自然科学基金(32360655;31960516)。

摘　　要：青海和甘肃两省是我国小麦条锈菌西北越夏流行区的重要组成部分。为探明两省小麦条锈菌越夏流行群体间毒性多样性,对2020年采自两省晚熟春小麦越夏流行期与冬小麦秋苗初期148份小麦条锈菌样品进行生理小种鉴定及群体毒性分析。结果表明,两省麦区共鉴定到13个已知生理小种或致病类型和17个未知类型,主要优势小种为CYR34,其流行频率为24.32%,逐次为CYR32(16.89%)、 CYR33(12.84%)。晚熟春小麦菌源群体毒性多样性较冬小麦秋苗菌源群体更丰富,两个菌源群体均克服抗条锈基因YrA、YrJu1、YrJu2、YrJu3、YrJu4和Yr1,对Yr10、Yr24、Yr26和Yr5毒性频率较低或为0。本研究明确了青海省和甘肃省小麦条锈菌越夏菌源群体毒性结构,对两省小麦条锈病流行防控与抗病品种的合理布局具有重要意义。Qinghai and Gansu provinces are important parts of the northwest over-summering epidemic area of wheat stripe rust in China.To investigate the virulence diversity of Puccinia striiformis f.sp.tritici(Pst)over-summering epidemic population in Qinghai and Gansu provinces,physiological race identification and population virulence analysis were conducted on 148 samples of wheat stripe rust collected from late-maturing spring wheat during the over-summering epidemic period,and winter wheat in initial autumn seedling stage in Qinghai and Gansu provinces in 2020.The results showed that 13 known races or pathogenic types and 17 unknown types were identified.The main dominant race prevalent in the wheat-growing regions of the two provinces was CYR34,with an epidemic frequency of 24.32%,followed by CYR32(16.89%)and CYR33(12.84%).The virulence diversity of the Pst population from late-maturing spring wheat was richer than that of from the autumn seedlings of winter wheat.Both wheat stripe rust pathogens populations have completely overcome the resistance genes of YrA,YrJu1,YrJu2,YrJu3,YrJu4 and Yr1.The virulence frequency against Yr10,Yr24,Yr26 and Yr5 was low or zero.This study has clarified the population virulence structure of the over-summering wheat stripe rust pathogens in Qinghai and Gansu provinces,which holds significant importance for the prevention and control of wheat stripe rust epidemics and the rational deployment of resistant wheat varieties in these two provinces.

关 键 词：小麦条锈菌 越夏流行 生理小种 群体毒性多样性 

分 类 号：S432.4[农业科学—植物病理学]