Identification of Leaf Rust Resistance in 40 Domestic Wheat Varieties
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1.College of Plant Protection, Hebei Agricultural University/Technological Innovation Center for Biological Control of Crop Disease and Insect Pests of Hebei Province, Baoding 071001;2.Plant Protection Station of Agricultural and Rural Bureau of Lincheng County, Xingtai City, Hebei Province, Xingtai 054300;3.College of Information Science and Technology, Hebei Agricultural University, Baoding 071001

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Foundation projects: National Natural Science Foundation of China(32001890,31871923)?;Open Fund Project of Qinghai Key Laboratory of Agricultural Pest Comprehensive Management(QHIIP-2021-03)?;Scholarship Fund Hebei Provinces Program for Introducing Overseas Chinese Scholars(C20190336)

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    Abstract:

    In order to analyze leaf rust resistance genes present in 40 domestic wheat cultivars, using 16 physiological races of leaf rust fungus to deduce their genes, it is speculated that the composition of the resistance genes to leaf rust disease in the tested material. And combined with 11 specific molecular markers closely linked to known disease resistance genes for validation. And further select 5 highly virulent races to make mixed strains, and conduct plant adult inoculation in the Baoding experimental field to screen wheat varieties that may contain adult slow rust genes. Based on pedigree analysis, gene postulation and molecular marker detection results, six known major leaf rust resistance genes (Lr1Lr11Lr20Lr26Lr30 and Lr37) were detected. Ten varieties including Yunhei 14207 contain Lr1; Hemei 988 and Bainong 207 contain Lr11; Yumai 49 and Bainong 207 contain Lr20; 23 varieties including Wanfeng 269 contain Lr26; Yunhei 14207 and Zhengmai 103 contain Lr30; four varieties including Luo6073 contain Lr37, and some varieties contain unknown genes for leaf rust resistance. Seven varieties, such as Luo 6073, were identified showing slow rust phenotype. Collectively, this study clarified the genetic composition of these varieties, and obtained elite resistant varieties which can be applied in resistance breeding and resistance gene stacking.

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History
  • Received:January 02,2023
  • Revised:February 06,2023
  • Adopted:
  • Online: June 13,2023
  • Published:
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