科研成果

Identification of Mahonia species as alternate hosts for Puccinia striiformis f. sp. tritici and determination of existence of sexual propag

作者:  来源:bevictor伟德官网  发布日期:2022-05-17  浏览次数:

论文信息: Identification of Mahonia species as alternate hosts for  Puccinia striiformis f. sp.  tritici and determination of existence of sexual propagation of the rust pathogen on Mahonia under natural conditions in China. Xiangrui Cheng, Hua Zhuang, Jing Zhao, Gangming Zhan,Zhensheng Kang*, and Jie Zhao*. Phytopathology, 2022, doi: https://doi.org/10.1094/PHYTO-12-21-0502-R

JCR分区Q1,中科院大类二区,Top期刊

论文摘要: Many  Berberis species have been identified as alternate hosts for  Puccinia striiformis f. sp.  tritici . Importantly, susceptible  Berberis species are determined to play an important role in the occurrence of sexual reproduction, generation of new races of the rust pathogen. However, little is known about  Mahonia serving as alternate hosts for  P. striiformis f. sp.  tritici and their role in commence of sexual reproduction of the rust fungus under natural conditions. Herein, three  Mahonia species or subspecies,  M. fortunei ,  M. eurybracteata subsp.  ganpinensis and  M. sheridanian , were identified as alternate hosts for  P. striiformis f. sp.  tritici , and seven  Mahonia species were highly resistant to the rust pathogen. We recovered seven samples of  P. striiformis f. sp.  tritici from naturally rusted  Mahonia cardiophylla plants. Totally, 54 single uredinium (SU) isolates, derived from the seven samples, generated 20 different race types, including 1 known race type, and 19 new race types. SNP markers analysis showed that all SU isolates displayed high phenotype diversity ( H = 0.32) with a high Shannon’s information index ( I = 0.49). Analysis of linkage disequilibrium indicated an insignificant rbarD value (rbarD = 0.003,  P < 0.1). As a result, all SU isolates are sexually produced, suggesting that  P. striiformis f. sp.  tritici parasitizes susceptible  Mahonia to complete sexual reproduction under natural conditions. The role of  Mahonia in occurrence of wheat stripe rust are needed to study for management of the disease.

原文链接:https://apsjournals.apsnet.org/doi/10.1094/PHYTO-12-21-0502-R