Multiple gene genealogy reveals high genetic diversity and evidence for multiple origins of Chinese Plasmopara viticola population

被引：0
作者：
Wei Zhang
Ishara S. Manawasinghe
Wensheng Zhao
Jianping Xu
Siraprapa Brooks
Xueyan Zhao
Kevin D. Hyde
K. W. Thilini Chethana
Jianhua Liu
Xinghong Li
Jiye Yan
机构：
[1] Institute of Plant and Environment Protection,Beijing Municipal Key Laboratory for Environmental Friendly Management on Pests of North China Fruits
[2] Beijing Academy of Agriculture and Forestry Sciences,College of Plant Protection
[3] China Agricultural University,Center of Excellence in Fungal Research
[4] Mae Fah Luang University,Department of Biology
[5] McMaster University,School of Science
[6] Mae Fah Luang University,undefined
来源：
Scientific Reports | / 7卷
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摘要：
Downy mildew caused by Plasmopara viticola is one of the most devastating diseases of grapevines worldwide. So far, the genetic diversity and origin of the Chinese P. viticola population are unclear. In the present study, 103 P. viticola isolates were sequenced at four gene regions: internal transcribed spacer one (ITS), large subunit of ribosomal RNA (LSU), actin gene (ACT) and beta-tubulin (TUB). The sequences were analyzed to obtain polymorphism and diversity information of the Chinese population as well as to infer the relationships between Chinese and American isolates. High genetic diversity was observed for the Chinese population, with evidence of sub-structuring based on climate. Phylogenetic analysis and haplotype networks showed evidence of close relationships between some American and Chinese isolates, consistent with recent introduction from America to China via planting materials. However, there is also evidence for endemic Chinese P. viticola isolates. Our results suggest that the current Chinese Plasmopara viticola population is an admixture of endemic and introduced isolates.
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