Identification of Stem Rust Resistance Genes in Triticum Wheat Cultivars and Evaluation of Their Resistance to Puccinia graminis f. sp. tritici

Fu Gao, Xianxin Wu, Huiyan Sun, Ziye Wang, Si Chen, Longmei Zou, Jinjing Yang, Yifan Wei, Xinyu Ni, Qian Sun and Tianya Li ()
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Fu Gao: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Xianxin Wu: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Huiyan Sun: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Ziye Wang: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Si Chen: Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
Longmei Zou: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Jinjing Yang: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Yifan Wei: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Xinyu Ni: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Qian Sun: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Tianya Li: College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China

Agriculture, 2024, vol. 14, issue 2, 1-12

Abstract: Wheat stem rust, caused by the fungus Puccinia graminis f. sp. tritici ( Pgt ), poses a substantial threat to global wheat production. Utilizing stem rust resistance ( Sr ) genes represents an economically viable, effective, and environmentally friendly approach to disease control. In this study, gene postulation, molecular testing, and pedigree analysis were used to identify the presence of Sr genes in 45 wheat cultivars. In addition, the resistance of these cultivars was evaluated against two predominant Pgt races, 34MRGQM and 21C3CTHTM, at the adult-plant stage during 2021–2022. The results identify seven Sr genes ( Sr31 , Sr38 , Sr30 , SrTmp , Sr22 , Sr19 , and Sr5 ) within 35 wheat cultivars. Among these, 23 cultivars contained Sr31 , whereas Sr5 and SrTmp were present in four cultivars each. Han 5316, Shimai 15, Shiyou 20, and Kenong 1006 exhibited the presence of Sr19 , Sr22 , Sr30 , and Sr38 , respectively. Molecular studies confirmed the absence of Sr25 and Sr26 in any of the wheat cultivars. During field evaluation, 37 (82.2%) and 39 (86.7%) wheat cultivars demonstrated resistance to races 34MRGQM and 21C3CTHTM, respectively. Moreover, 33 wheat cultivars (73.3%) exhibited resistance to all the tested races. These study findings will significantly contribute to future research in wheat pre-breeding and abiotic stress tolerance.

Keywords: wheat stem rust; Puccinia graminis f. sp. tritici; gene postulation; Sr gene (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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