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Seedling and adult plant resistance to leaf rust in 46 Chinese bread wheat landraces and 39 wheat lines with known Lr genes

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Journal of Integrative Agriculture 2019年第5期18卷 1014-1023页

作者： ZHANG Pei-pei Takele Weldu Gebrewahid ZHOU Yue LI Qing-luo LI Zai-feng LIU Da-qun Department of Plant Pathology College of Plant Protection Hebei Agricultural University College of Agriculture Aksum University-Shire Campus College of Biochemistry and Environmental Engineering Baoding University

Wheat leaf rust,caused by Puccinia triticina(Pt),is an important foliar disease that has an important influence on wheat *** most economic,safe and effective way to control the disease is growing resistant *** the present study,a total of 46 wheat landraces and 34 wheat lines with known Lr(leaf rust resistance)genes were inoculated with 16Pt pathotypes for postulating seedling resistance gene(s)in the *** cultivars and five wheat differential lines with adult plant resistance(APR)genes(Lr12,Lr22b,Lr34,Lr35 and Lr37)were also evaluated for identification of slow rusting resistance in the field trials in Baoding,Hebei Province of China in the 2014–2015 and 2015–2016 cropping ***,10 functional molecular markers closely linked to 10 known Lr genes were used to detect all the wheat *** showed that most of the landraces were susceptible to most of the Pt pathotypes at seedling ***,Lr1 was detected only in *** field experimental test of the two environments showed that 38 landraces showed slow rusting *** cultivars possessed Lr34 but none of the landraces contained Lr37 and *** genes namely,Lr9,Lr19,Lr24,Lr28,Lr29,Lr47,Lr51 and Lr53 were effective at the whole plant ***18,Lr36 and Lr45 had lost resistance to part of pathotypes at the seedling stage but showed high resistance at the adult plant ***34 as a slowing rusting gene showed good resistance in the *** race-specific APR genes Lr12,Lr13,Lr35 and Lr37 conferred good resistance in the field *** race-specific genes,Lr2b,Lr2c,Lr11,Lr16,Lr26,Lr33 and LrB had lost *** 38 landraces showed slow rusting resistance to wheat leaf rust can be used as resistance resources for wheat resistance breeding in China.

关键词： Triticum aestivum L. wheat leaf rust gene postulation adult plant resistance

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