Fu-Qiang Zhao1, Qi Li2, Guo-Yue Chen1,3, Jun Li4, Hou-Yang Kang1,3, Yi Wang1,3, Xing Fan1,3, Li-Na Sha1,3, Yong-Hong Zhou1,3 andHai-Qin Zhang1,3,*
1Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China
2Wuhan STM Bio Technology Co., Ltd, Wuhan, China
3Key Laboratory of Crop
Genetic Resources and Improvement, Ministry of Education, Sichuan
Agricultural University, Chengdu, China
4Research Institute of Crop Science, Sichuan Academy of Agricultural Sciences, Chengdu, China
* Correspondence
H.-Q. Zhang, Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China.
E-mail: haiqinzhang@163.com
DOI: 10.1111/jph.12541
Journal of Phytopathology Volume 165, Issue 3 March 2017 Pages 157–161
Keywords:
genetic resources;Puccinia striiformis f.sp. tritici;resistance gene; Roegneria kamoji ;yellow rust
Abstract
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 CYR29,
CYR33 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, F1 and F2 populations
were tested in a field inoculated with the mixed urediniospores. ZY 1007
and all the observed 11 F1 hybrid plants were resistant, while plants
of Gansi No.1 were susceptible. Among the 221 F2 plants, 168 plants were
resistant and 53 were susceptible, and the segregation of resistant and
susceptible plants fits 3R:1S ratio (χ2 = 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.