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学科主题: Science & Technology - Other Topics
题名: Genetic Variations in Two Seahorse Species (Hippocampus mohnikei and Hippocampus trimaculatus): Evidence for Middle Pleistocene Population Expansion
作者: Zhang, YH ; Pham, NK ; Zhang, HX ; Lin, JD ; Lin, Q
通讯作者: linqiangzsu@163.com
刊名: PLOS ONE
发表日期: 2014
卷: 9, 期:8, 页:-e105494
收录类别: sci
部门归属: [Zhang, Yanhong ; Zhang, Huixian ; Lin, Qiang] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou, Guangdong, Peoples R China ; [Pham, Nancy Kim ; Lin, Junda] Florida Inst Technol, Vero Beach Marine Lab, Vero Beach, FL USA
项目归属: LMB
资助者: Outstanding Youth Foundation in Guangdong Province [S2013050014802]; National Natural Science Foundation of China [41176146, 41306148]; US National Science Foundation East Asia and Pacific Summer Institute Fellowship (EAPSI) [OISE-1209841]
摘要: Population genetic of seahorses is confidently influenced by their species-specific ecological requirements and life-history traits. In the present study, partial sequences of mitochondrial cytochrome b (cytb) and control region (CR) were obtained from 50 Hippocampus mohnikei and 92 H. trimaculatus from four zoogeographical zones. A total of 780 base pairs of cytb gene were sequenced to characterize mitochondrial DNA (mtDNA) diversity. The mtDNA marker revealed high haplotype diversity, low nucleotide diversity, and a lack of population structure across both populations of H. mohnikei and H. trimaculatus. A neighbour-joining (NJ) tree of cytb gene sequences showed that H. mohnikei haplotypes formed one cluster. A maximum likelihood (ML) tree of cytb gene sequences showed that H. trimaculatus belonged to one lineage. The star-like pattern median-joining network of cytb and CR markers indicated a previous demographic expansion of H. mohnikei and H. trimaculatus. The cytb and CR data sets exhibited a unimodal mismatch distribution, which may have resulted from population expansion. Mismatch analysis suggested that the expansion was initiated about 276,000 years ago for H. mohnikei and about 230,000 years ago for H. trimaculatus during the middle Pleistocene period. This study indicates a possible signature of genetic variation and population expansion in two seahorses under complex marine environments.
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10397
Appears in Collections:中科院海洋生物资源可持续利用重点实验室_期刊论文

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Zhang, YH; Pham, NK; Zhang, HX; Lin, JD; Lin, Q.Genetic Variations in Two Seahorse Species (Hippocampus mohnikei and Hippocampus trimaculatus): Evidence for Middle Pleistocene Population Expansion,PLOS ONE,2014,9(8):-e105494
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