文献类型：期刊文献

英文题名：Divergence, dispersal and recombination in Lepiota cristata from China

作者：Liang, J. F.[1,2] Xu, J.[3] Yang, Z. L.[1]

第一作者：梁俊峰;Liang, J. F.

通信作者：Yang, ZL[1]

机构：[1]Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[3]McMaster Univ, Dept Biol, Ctr Environm Genom, Hamilton, ON L8S 4K1, Canada

年份：2009

卷号：38

起止页码：105-124

外文期刊名：FUNGAL DIVERSITY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000271500200006)】；

基金：We are very grateful to Dr. ZW. Ge, Dr. L.F. Zhang, Dr. Y.C. Li, and Mr. X.F. Tian, Kunming Institute of Botany, for providing us with some valuable collections of Lepiota. We thank Dr. E.C. Vellinga and two anonymous reviewers for important, thoughtful and supportive comments. This study was supported by the Joint Funds of the National Natural Science Foundation of China and Yunnan Provincial Government (No. U0836604), the National Science Fund for Distinguished Young Scholars (No. 30525002) of the National Natural Science Foundation of China, the National Basic Research Program of China (No. 2009CB522300), the Knowledge Innovation Program of the Chinese Academy of Sciences (No. KSCX2-YW-G-025) and the Key Laboratory of Biodiversity and Biogeo-graphy, Chinese Academy of Sciences (No. 0806371111).

语种：英文

外文关键词：Basidiomycete; genetic diversity; gene flow; recombination; cryptic species

摘要：The basidiomycete Lepiota cristata (Agaricales) is among the most widely distributed saprophytic Mushrooms in the Northern Hemisphere. It's commonly found on humus-rich soil in a variety of terrestrial habitats, from roadsides to forest floors. In this study, we analyzed 47 isolates of the L. cristata species complex from China using DNA sequences from three loci (the internal transcribed spacer region or ITS, the inter-genic spacer or IGS, and the mitochondrial small ribosomal subunit RNA gene or mtSSU rRNA). Our analyses identified abundant sequence variation and potentially divergent lineages within L. cristata for each of the three loci. Interestingly, there were significant differences among the three gene genealogies and our linkage disequilibrium analyses identified unambiguous evidence of recombination, hybridization and/or incomplete lineage sorting. Furthermore, several sequence types were shared among isolates from diverse geographic locations for each of the three analyzed loci. Our population genetic analyses indicated limited evidence for genetic differentiation among geographic populations, suggesting that long-distance gene flow might be common among geographic populations of this species in China. We discuss the implications Of Our results with regard to the Population biology and taxonomy of this widely distributed but under-studied species.