小麦叶锈菌生理小种研究  

The Study of Physiologic specialization of Puccinia recondita f.sp.tritci

作　　者：袁景顺 朱之堉[1] 

机构地区：[1]河北农业大学植保系

出　　处：《河北农业大学学报》1994年第3期85-88,共4页Journal of Hebei Agricultural University

摘　　要：根据全国统一的８个寄主鉴定结果，仍以叶１（２６），叶２（３６０）和洛１０小种群为主要优势小种（群）。在洛１０小种中仍以３６１，２６１，３６３和３７７出现频率较高。近年来，叶１，叶２出现频率在逐年增长，叶３在下降。用新鉴别寄主鉴定的小种，以Ｖ１，９－１２，１５－１６；Ｖ１，９－１２，１５－１６；Ｖ１，９－１６；Ｖ１，９－１２，１４－１６；Ｖ１，９－１３；１５－１６出现频率较高。用毒力频率分析，ＩＲＮ６６—３３１，Ｒｅｄｍａｎ６０６８，百农３２１７和丰抗１３抗性较好，而东方红３号，丰产３号等品种高度感病，能侵染洛１０品种小种在逐年上升，毒力频率均达８３．３３％。这为抗锈育种寻找抗源提出了新的要求。isolates of the rust collected from north and northwest China, Anhui, Sichuan, and Yunnan provinces were studied in 1992-1993. The prevalent races and race group were races 1 (260). race 2 (360) and Lovrin 10 race group with freguency of accurrence of 7.3%, 3.6% and 83.3% respectively. The prevalent races within the Lovrine 10 race group were races 361, 261, 363 and 377 with high frequeoncyf accurrence of 25.6%, 24.8%, 12.6% and 9.7% respectively, It is worth noting that races capable infecting Lovrin, an important source of resistance,still increased and threatened the production of wheat grown in vast north China. The study of rirulence frequency on new differentials revealved that seveval important sources of resistance were highly susceptible to the population of rust tested. Search of new sources of resistance of urgently needed both for breeding progranas well as race studies.

关 键 词：小麦 叶锈菌 生理小种 鉴别寄主 

分 类 号：S435.121.4[农业科学—农业昆虫与害虫防治]