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European Journal of Plant Pathology

, Volume 153, Issue 2, pp 545–555 | Cite as

Race and virulence of asexual and sexual populations of Puccinia graminis f. sp. tritici in China from 2009 to 2015

  • Yuanyin CaoEmail author
  • Binbin Si
  • Guiqing Zhu
  • Xiaofeng Xu
  • Weihua Li
  • Si Chen
  • Jie Zhao
  • Tianya LiEmail author
Article

Abstract

Stem rust of wheat caused by Puccinia graminis f. sp. tritici (Pgt) has been under control in China for decades but new races including the Ug99 race group are an ongoing threat. Pgt race surveillance is an essential component for disease prevention strategies. Three hundred fourteen isolates (284 asexual and 30 sexual) obtained from 2009 to 2015 in China were tested on a panel of differential lines and categorized into five race groups (21C3, 34C0, 34C1, 34C3, and 34C6) and 29 races. Race group 21C3 was most frequent (64.0%) and race 21C3CTHTM was the most prevalent (16.6%). Race group 34C6 and 15 races were detected for the first time, accounting for 2.5 and 27.4% of the isolates, respectively. The most widely used stem rust resistance gene (Sr31) is effective against all isolates, however other commonly used resistance genes (Sr5, and Sr17) are only effective to some of the isolates. Novel Pgt races with virulence to both Sr5 and Sr11 were detected. Isolates from the sexual population were strikingly different from those of the asexual population, having higher frequency of new race group, new races and new virulence combination (Sr5 + Sr11). In addition, the higher variation in sexual Pgt population observed in the region growing wild barberries suggests that these sites might be responsible for the occurrence of new races in major wheat growing areas in China.

Keywords

Physiological races Sexual population Puccinia graminis f. sp. tritici Berberis Sr genes 

Notes

Acknowledgments

This study was supported by the National Key Basic Research Program of China (2013CB127701), the Special Fund for Agro-Scientific Research in the Public Interest (201303016) and the National Natural Science Foundation of China (31171829). The great deal of effort was made by our colleagues to get asexual samples in different locations. We deeply appreciate their assistance.

Compliance with ethical standards

Conflicts of interest

This manuscript has not been published or presented elsewhere in part or in entirety and is not under consideration by another journal. All authors have read and understood your journal’s Ethical Standards and Informed consent, and we believe that neither the manuscript nor the study violates any of these. There are no conflicts of interest to declare, and don’t involve Human Participants and Animals. All authors agree to submit article to European Journal of Plant Pathology.

Supplementary material

10658_2018_1581_MOESM1_ESM.xlsx (17 kb)
ESM 1 (XLSX 17 kb)

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Copyright information

© Koninklijke Nederlandse Planteziektenkundige Vereniging 2018

Authors and Affiliations

  1. 1.College of Plant ProtectionShenyang Agricultural UniversityShenyangChina
  2. 2.College of Plant ProtectionNorthwest A &F UniversityYanglingChina

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