Searching for speciation genes: molecular evidence for selection associated with colour morphotypes in the Caribbean reef fish genus Hypoplectrus

TY - JOUR

T1 - Searching for speciation genes

T2 - molecular evidence for selection associated with colour morphotypes in the Caribbean reef fish genus Hypoplectrus

AU - Holt, Benjamin George

AU - Côté, Isabelle M

AU - Emerson, Brent C

N1 - Artikel ID: e20394

PY - 2011

Y1 - 2011

N2 - Closely related species that show clear phenotypic divergence, but without obvious geographic barriers, can provide opportunities to study how diversification can occur when opportunities for allopatric speciation are limited. We examined genetic divergence in the coral reef fish genus Hypoplectrus (family: Serranidae), which comprises of 10-14 morphotypes that are distinguished solely by their distinct colour patterns, but which show little genetic differentiation. Our goal was to detect loci that show clear disequilibrium between morphotypes and across geographical locations. We conducted Amplified Fragment Length Polymorphism molecular analysis to quantify genetic differentiation among, and selection between, morphotypes. Three loci were consistently divergent beyond neutral expectations in repeated pair-wise morphotype comparisons using two different methods. These loci provide the first evidence for genes that may be associated with colour morphotype in the genus Hypoplectrus.

AB - Closely related species that show clear phenotypic divergence, but without obvious geographic barriers, can provide opportunities to study how diversification can occur when opportunities for allopatric speciation are limited. We examined genetic divergence in the coral reef fish genus Hypoplectrus (family: Serranidae), which comprises of 10-14 morphotypes that are distinguished solely by their distinct colour patterns, but which show little genetic differentiation. Our goal was to detect loci that show clear disequilibrium between morphotypes and across geographical locations. We conducted Amplified Fragment Length Polymorphism molecular analysis to quantify genetic differentiation among, and selection between, morphotypes. Three loci were consistently divergent beyond neutral expectations in repeated pair-wise morphotype comparisons using two different methods. These loci provide the first evidence for genes that may be associated with colour morphotype in the genus Hypoplectrus.

KW - Amplified Fragment Length Polymorphism Analysis

KW - Animals

KW - Bass

KW - Genetic Loci

KW - Genetic Markers

KW - Genetic Speciation

KW - Phenotype

KW - Pigmentation

KW - Selection, Genetic

U2 - 10.1371/journal.pone.0020394

DO - 10.1371/journal.pone.0020394

M3 - Journal article

C2 - 21687658

SN - 1932-6203

VL - 6

JO - PLoS Computational Biology

JF - PLoS Computational Biology

IS - 6

ER -