Journal article

Stripe rust resistance gene Yr18 and its suppressor gene in Chinese wheat landraces

Ling Wu, Xianchun Xia, Garry M Rosewarne, Huazhong Zhu, Shizhao Li, Zhengyu Zhang, Zhonghu He

PLANT BREEDING | WILEY-BLACKWELL | Published : 2015

Abstract

The slow-rusting and mildewing gene Yr18/Lr34/Pm38/Sr57 confers partial, durable resistance to multiple fungal pathogens and has its origins in China. A number of diagnostic markers were developed for this gene based on the gene sequence, but these markers do not always predict the presence of the resistant phenotype as some wheat varieties with the gene are susceptible to stripe rust in China. We hypothesized that these varieties have a suppressor of Yr18. This study was undertaken to determine the presence of Yr18, the suppressor and/or another resistance gene in 144 Chinese wheat landraces using molecular markers and stripe rust field data. Forty-three landraces were predicted to have Yr1..

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Grants

Awarded by National Natural Science Foundation of China


Awarded by National Key Basic Research Program of China


Awarded by Sichuan Province Youth Science and Technology Innovation Team


Funding Acknowledgements

The authors are grateful to Prof. R. A. McIntosh, Plant Breeding Institute, University of Sydney, for critical review of this manuscript. This study was supported by the National Natural Science Foundation of China (31271724), the National Key Basic Research Program of China (2013CB127700), Sichuan Province Projects targeting research innovation and ability promotion (NSFC special supplemental grant) and the Sichuan Province Youth Science and Technology Innovation Team (2014TD0014).