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Genetic Diversity of Wheat Stripe Rust Fungus Puccinia striiformis f. sp. tritici in Yunnan, China

文献类型： 外文期刊

作者： Alam, Md. Ashraful 1 ; Li, Haoxing 1 ; Hossain, Akbar 2 ; Li, Mingju 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Agr Environm & Resource Res Inst, Yunnan Key Lab Green Prevent & Control Agr Transb, Kunming 650205, Yunnan, Peoples R China

2.Bangladesh Wheat & Maize Res Inst, Dinajpur 5200, Bangladesh

3.Huazhong Agr Univ, Coll Life Sci & Technol, Wuhan 430070, Peoples R China

关键词： genetic diversity; population structure; wheat; Puccinia striiformis f. sp. tritici; Yunnan Province; China

期刊名称：PLANTS-BASEL （ 影响因子：3.935； ）

ISSN：

年卷期： 2021 年 10 卷 8 期

页码：

收录情况： SCI

摘要： The stripe rust of wheat is one of the devastating diseases in China, which is caused by fungus Puccinia striiformis f. sp. tritici (Pst). The Yunnan Province of China is located in the south-western part, and holds distinctive geographical and climate features, while wheat growth and epidemics of stripe rust fungus are fully dissimilar to the major wheat-growing regions of China. It is important to discover its origin and migration to control the disease. In this study, 352 isolates were sampled from 11 spots of the Yunnan Province during the wheat growing season from 2004 to 2015 and analyzed with SNPs markers of housekeeping genes. Results revealed that 220 haplotypes were inferred from the concatenating sequences; among them, 5 haplotypes (viz., 'H86', 'H18', 'H8', 'H15 and 'H23) comprised over 24.5% of the population. The haplotype diversity, nucleotide diversity, mutation rate and recombination events were 0.992, 6.04 x 10(-3), 4.46 x 10(-3) and 18.0 respectively, which revealed the genetic diversity of Pst populations among all locations. Four grouping methods, such as UPGMA-tree, PCA, PLS-DA and STRUCTURE, were employed for the categorization of the Pst populations conferring to their races and topographical localities. All methods were found significant and mostly had co-linear relations with each other. The analysis of molecular variance (AMOVA) conferred total variation was 9.09%, and 86.20% of variation was within the populations. The current study also exposed a comparatively high genetic multiplicity within the population, while low genetic inconsistency among the populations. Furthermore, the molecular records on the gene pole (Nm = 18.45) established that the migration of the stripe rust pathogen occurred among all locations in Yunnan province. The ancestral haplotype was detected in Yuxi. Based on the trajectories of upper airflow and genetic diversity of Pst populations in different locations, it is suggested that the locations Dehong, Dali, Lincang and Baoshan are probably a major source of Pst in Yunnan.

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