文献类型：期刊文献

英文题名：Contrasting fine-scale genetic structure of two sympatric clonal plants in an alpine swampy meadow featured by tussocks

作者：Ning, Yu[1] Wu, Gao-Jie[1] Ma, Hua[1,2] Guo, Ju-Lan[1,2] Zhang, Man-Yin[1,3] Li, Wei[1,3] Wang, Yi-Fei[1,2] Duoerji, Suo-Lang[4]

第一作者：宁宇

通信作者：Wang, YF[1];Wang, YF[2]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing, Peoples R China;[2]Zoige Alpine Wetland Ecosyst Res Stn, Zoige, Sichuan, Peoples R China;[3]Chinese Acad Forestry, Key Lab Wetland Serv & Restorat, Beijing, Peoples R China;[4]Adm Zoige Wetland Natl Nat Preserve, Zoige, Sichuan, Peoples R China

年份：2018

卷号：13

期号：12

外文期刊名：PLOS ONE

收录：;Scopus(收录号：2-s2.0-85058908944);WOS:【SCI-EXPANDED(收录号:WOS:000454149400058)】；

基金：This work was supported by the National Nonprofit Institute Research Grant from CAFINT (No. CAFINT2015C11) and the Fundamental Research Funds for the Central Nonprofit Research Institution of CAF(No. CAFYBB2017QA040) to YN. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.; We give special thanks to Alde Zu of Ba Xi County for his kind assistance and participation. We are also grateful to Si YANG and Zhao-Rui LIANG for providing the field photos. This study was financially supported by the National Nonprofit Institute Research Grant (CAFINT2015C11) and the Fundamental Research Funds for the Central Nonprofit Research Institution of CAF (CAFYBB2017QA040). In addition, we would like to thank two anonymous reviewers for their help in improving this manuscript.

语种：英文

摘要：Tussocks are unique vegetation structures in wetlands. Many tussock species mainly reproduce by clonal growth, resulting in genetically identical offspring distributed in various spatial patterns. These fine-scale patterns could influence mating patterns and thus the long-term evolution of wetland plants. Here, we contribute the first genetic and clonal structures of two key species in alpine wetlands on the Qinghai-Tibet Plateau, Kobresia tibetica and Blysmus sinocompressus, using > 5000 SNPs identified by 2b-RAD sequencing. The tussock-building species, K. tibetica, has a phalanx (clumping) growth form, but different genets could cooccur within the tussocks, indicating that it is not proper to treat a tussock as one genetic individual. Phalanx growth does not necessarily lead to increased inbreeding in K. tibetica. B. sinocompressus has a guerilla (spreading) growth form, with the largest detected clone size being 18.32 m, but genets at the local scale tend to be inbred offspring. Our results highlight that the combination of clone expansion and seedling recruitment facilitates the contemporary advantage of B. sinocompressus, but its evolutionary potential is limited by the input genetic load of the original genets. The tussocks of K. tibetica are more diverse and a valuable genetic legacy of former well-developed wet meadows, and they are worthy of conservation attention.