Himalayan mountains imposing a barrier on gene flow of wheat yellow rust pathogen in the bordering regions of Pakistan and China

文献类型： 外文期刊

第一作者： Awais, Muhammad

作者： Awais, Muhammad;Zhao, Jie;Cheng, Xiangrui;Ju, Meng;Chen, Wen;Liu, Maxinzhi;Ma, Xinyao;Wang, Lin;Liu, Wei;Du, Zhimin;Sun, Mudi;Zhang, Gensheng;Kang, Zhensheng;Khoso, Abdul Ghaffar;Rehman, Zia Ur;Iqbal, Aamir;Khan, Muhammad Rameez;Ali, Sajid;Chen, Wen

作者机构：

关键词： Population genetics; Wheat stripe rust; Himalaya; Microsatellites; Genotypic diversity

期刊名称：FUNGAL GENETICS AND BIOLOGY （ 影响因子：3.0； 五年影响因子：3.3 ）

ISSN： 1087-1845

年卷期： 2023 年 164 卷

页码：

收录情况： SCI

摘要： The wheat yellow rust pathogen has been shown to be diverse and potentially originated in the Himalayan re-gion. Although Himalayan populations of Pakistan, Nepal and Bhutan have been previously compared, little is known about the relative divergence and diversity in Puccinia striiformis populations in the bordering regions of Pakistan and China. To assess the relative diversity and divergence in these regions of Pakistan (Gilgit-Baltistan, Hazara and Azad Jammu Kashmir) and China (Xinjiang, Qinghai, Tibet, Sichuan, Guizhou and Yunnan), a total of 1245 samples were genotyped using 17 microsatellite SSR markers. A clear divergence was observed between the bordering regions of Pakistan and China (FST = 0.28) without any resampling of genetic groups and multilocus genotypes across two sides of the Himalayan mountains. The closest subpopulations across the two countries were Xinjiang and Gilgit-Baltistan (Nei's distance = 0.147), which were close geographically. A very high di-versity and recombinant population structure was observed in both populations, though slightly higher in China (Genotypic diversity = 0.970; r?d = 0.000) than in Pakistan (Genotypic diversity = 0.902; r?d = 0.065). The distribution of genetic groups and resampling of MLGs revealed more gene flow across Yunnan, Guizhou and Sichuan regions in China, while between Hazara and Azad-Jammu Kashmir in Pakistan. The lack of gene flow between Pakistan and China populations is due to geographical barriers and a large patch of land without wheat. The information on the relative diversity and divergence in different geographical zones of the pathogen center of diversity and neighboring region should be considered in resistant wheat deployment while considering the invasion potential of the pathogen at regional and global contexts.

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