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Stripe Rust Resistance in Roegneria kamoji (Poaceae: Triticeae) and its Genetic Analysis
Author(s) -
Zhao FuQiang,
Li Qi,
Chen GuoYue,
Li Jun,
Kang HouYang,
Wang Yi,
Fan Xing,
Sha LiNa,
Zhou YongHong,
Zhang HaiQin
Publication year - 2017
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12541
Subject(s) - biology , poaceae , rust (programming language) , inoculation , urediniospore , triticeae , botany , seedling , horticulture , gene , genetics , genome , computer science , programming language
The Roegneria kamoji accession ZY 1007 was resistant to the mixed predominant races of Puccinia striiformis f.sp. tritici ( Pst ) in China based on field tests at adult‐plant stage. The seedling resistance evaluation of ZY 1007 showed that it was resistant to stripe rust physiological strains CYR 29, CYR 33 and PST ‐V26, which were the predominant races of Pst in China. The female parent R. kamoji cv. Gansi No.1 (susceptible to Pst ) was crossed with ZY 1007 (resistant to Pst ). Parents, F 1 and F 2 populations were tested in a field inoculated with the mixed urediniospores. ZY 1007 and all the observed 11 F 1 hybrid plants were resistant, while plants of Gansi No.1 were susceptible. Among the 221 F 2 plants, 168 plants were resistant and 53 were susceptible, and the segregation of resistant and susceptible plants fits 3R:1S ratio ( χ 2 = 0.074, P > 0.75). It confirmed that the resistance of stripe rust in ZY 1007 was controlled by a single dominant gene and temporarily designated as YrK1007 .