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Genetic structure and demographic histories of two sympatric culter species in eastern China

Journal of Oceanology and Limnology 2020年第2期38卷 408-426页

作者： XIONG Ying LI Wei YUAN Jing ZHANG Tanglin LI Zhongjie XIAO Wuhan LIU Jiashou State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China

Geographic isolation is a key factor in shaping the genetic structure of many fish *** sympatric species,culter alburnus and ***,are economically important fish that are widely distributed in China and have been recently used as new aquaculture *** used the mitochondrial DNA control region(CR)as a marker to investigate the genetic structure of the two *** analysis revealed two major lineages(Lineages I and II)that were highly consistent with geographical patterns for *** and *** on genetic distance,the Zhujiang(Pearl)River Basin(ZRB)populations potentially represented a cryptic subspecies,which might be differentiated as the result of strict geographic isolation,an earlier diverged event,or peripheral *** diversity analysis suggested that the Changjiang(Yangtze)River Basin(CRB)populations are located at,or near the core region of their origination,not only due to the larger population size at the CRB,but also their habitat diversity and suitability for its survival,and the genetic diversity dif ferences among basin populations were significant for the two ***,demographic analysis indicated that the two culter species and most populations had undergone a period of population expansion during warm interglacial ***,the *** population of Huaihe River Basin(Weishan Lake)exhibited different patterns during the interglacial period,which may due to the latest diverged time of HRB and Weishan Lake located at the ***,the ZRB(in Songtao Reservoir)*** population showed no genetic diversity and had a unique haplotype,which could be treated as a special gene pool for species *** summary,geographic isolation is most likely responsible for the two culter species distribution patterns.

关键词： culter species drainage basin genetic differentiation geographic isolation

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