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The role of pleiotropy and linkage in genes affecting a sexual ornament and bone allocation in the chicken
Author(s) -
Johnsson M.,
Rubin C.J.,
Höglund A.,
Sahlqvist A.S.,
Jonsson K. B.,
Kerje S.,
Ekwall O.,
Kämpe O.,
Andersson L.,
Jensen P.,
Wright D.
Publication year - 2014
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1111/mec.12723
Subject(s) - biology , pleiotropy , quantitative trait locus , genetic architecture , genetics , gene , trait , candidate gene , genetic linkage , evolutionary biology , fecundity , sexual selection , phenotype , population , demography , sociology , computer science , programming language
Sexual selection and the ornaments that inform such choices have been extensively studied, particularly from a phenotypic perspective. Although more is being revealed about the genetic architecture of sexual ornaments, much still remains to be discovered. The comb of the chicken is one of the most widely recognized sexual ornaments, which has been shown to be correlated with both fecundity and bone allocation. In this study, we use a combination of multiple intercrosses between W hite L eghorn populations and wild‐derived Red Junglefowl to, first, map quantitative trait loci ( QTL ) for bone allocation and, second, to identify expression QTL that correlate and colocalize with comb mass. These candidate quantitative genes were then assessed for potential pleiotropic effects on bone tissue and fecundity traits. We identify genes that correlate with both relative comb mass and bone traits suggesting a combination of both pleiotropy and linkage mediates gene regulatory variation in these traits.