Multilocus approach reveals cryptic lineages in the goby Rhinogobius duospilus in Hong Kong streams: Role of paleodrainage systems in shaping marked population differentiation in a city
Publication in refereed journal

香港中文大學研究人員

引用次數
替代計量分析
.

其它資訊
摘要Drainage history is a well-demonstrated factor that influences the population structure of freshwater inhabitants over a broad geographic scale. However, there has been little research undertaken on such a relationship with freshwater fish on a small geographical scale, especially in Asia. In this study, we investigated the role of local, small drainage systems in affecting the population genetic structure of a freshwater goby, Rhinogobius duospilus, in Hong Kong streams using a multilocus approach. Analyses on nine genetic markers (2 mitochondrial and 7 nuclear markers, including 5 microsatellite markers) reveal prominent and intensive genetic structuring (2.1-5.4% mtDNA sequence divergence) in R. duospilus in Hong Kong. The lineages and clusters recovered from mtDNA data and assignment analysis of nuclear markers coincide with the paleodrainage networks. Furthermore, marked population subdivision between streams located on different side branches (<20 km apart) within the same paleodrainage area is observed and gene flow occurs only between closely situated streams that share common paleodrainage confluences. In an extreme case, gene flow is limited between streams that are less than 5 km apart. Apparently, such an intensive population structure is attributed to the regional paleodrainage pattern, together with the highly sedentary life style of R. duospilus, which reduces contemporary gene flow and dispersal between populations in neighbouring streams. (C) 2016 Elsevier Inc. All rights reserved.
著者Wu TH, Tsang LM, Chen IS, Chu KH
期刊名稱Molecular Phylogenetics and Evolution
出版年份2016
月份11
日期1
卷號104
出版社ACADEMIC PRESS INC ELSEVIER SCIENCE
頁次112 - 122
國際標準期刊號1055-7903
電子國際標準期刊號1095-9513
語言英式英語
關鍵詞Freshwater fish; Paleodrainage; Pleistocene; South China
Web of Science 學科類別Biochemistry & Molecular Biology; Evolutionary Biology; Genetics & Heredity

上次更新時間 2020-18-10 於 01:42