RADseq analyses reveal concordant Indian Ocean biogeographic and phylogeographic boundaries in the reef fish Dascyllus trimaculatus

被引：11

作者：

Salas, E. M. ^{[1
,2
]}

Bernardi, G. ^{[2
]}

Berumen, M. L. ^{[3
]}

Gaither, M. R. ^{[4
]}

Rocha, L. A. ^{[1
]}

机构：

[1] Calif Acad Sci, Sect Ichthyol, 55 Mus Concourse Dr, San Francisco, CA 94118 USA

[2] Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, 100 Shaffer Rd, Santa Cruz, CA 95060 USA

[3] King Abdullah Univ Sci & Technol, Biol & Environm Sci & Engn Div, Red Sea Res Ctr, Thuwal, Saudi Arabia

[4] Univ Cent Florida, Genom & Bioinformat Cluster, Dept Biol, 4110 Libra Dr, Orlando, FL 32816 USA

来源：

ROYAL SOCIETY OPEN SCIENCE | 2019年 / 6卷 / 05期

关键词：

population genomics; outlier loci; connectivity; Indian Ocean; Red Sea; Dascyllus trimaculatus; POPULATION-STRUCTURE; GENETIC CONNECTIVITY; LARVAL DURATION; PACIFIC; SEA; DIFFERENTIATION; DAMSELFISHES; CONGRUENT; MARKERS; LOCI;

D O I：

10.1098/rsos.172413

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Population genetic analysis is an important tool for estimating the degree of evolutionary connectivity in marine organisms. Here, we investigate the population structure of the three-spot damselfish Dascyllus trimaculatus in the Red Sea, Arabian Sea and Western Indian Ocean, using 1174 single nucleotide polymorphisms (SNPs). Neutral loci revealed a signature of weak genetic differentiation between the Northwestern (Red Sea and Arabian Sea) and Western Indian Ocean biogeographic provinces. Loci potentially under selection (outlier loci) revealed a similar pattern but with a much stronger signal of genetic structure between regions. The Oman population appears to be genetically distinct from all other populations included in the analysis. While we could not clearly identify the mechanisms driving these patterns (isolation, adaptation or both), the datasets indicate that population-level divergences are largely concordant with biogeographic boundaries based on species composition. Our data can be used along with genetic connectivity of other species to identify the common genetic breaks that need to be considered for the conservation of biodiversity and evolutionary processes in the poorly studied Western Indian Ocean region.

引用

页数：9