College of Plant Protection and State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, P.O. Box 13#, Yangling 712100, Shaanxi Province, China.
World J Microbiol Biotechnol. 2013 Jan;29(1):173-81. doi: 10.1007/s11274-012-1170-7. Epub 2012 Oct 9.
Population genetic diversity in Tianshui city was analyzed with SSR markers in 605 single-pustule isolates of the stripe rust pathogen, Puccinia striiformis f. sp. tritici (Pst), obtained from 19 varieties of wheat. Significant differences in genetic diversity among populations were defected. Genetic diversity was highest in population on Tian 863-13, a highly resistant variety, whereas genetic diversity was lowest in population on Huixianhong, a highly susceptible variety. Seven populations from seven varieties that carried the common Yr18 resistance gene were clustered as one sub-group at 0.88 similarity coefficient, which showed that resistance gene selection had close relation with pathogen's component. The results of present study can provide a theoretical basis for integrated management of wheat stripe rust and effective deployment of resistance genes in Pst over-summering zones in China.
利用 SSR 标记对采自 19 个小麦品种的 605 个单疱锈菌分离物进行了群体遗传多样性分析。结果表明，群体间存在显著的遗传多样性差异。在高抗品种天 863-13 上的群体遗传多样性最高，而在高感品种会选红上的群体遗传多样性最低。携带常见 Yr18 抗性基因的 7 个群体从 7 个品种聚类为一个亚群，相似系数为 0.88，表明抗性基因的选择与病原菌的组成密切相关。本研究结果可为中国小麦条锈菌越夏区的综合治理和有效部署抗性基因提供理论依据。
