Heritability and cross-sex genetic correlations of early-life circulating testosterone levels in a wild mammal.

ABSTRACT: Testosterone is an important hormone that has been shown to have sex-specific links to fitness in numerous species. Although testosterone concentrations vary substantially between individuals in a population, little is known about its heritable genetic basis or between-sex genetic correlations that determine its evolutionary potential. We found circulating neonatal testosterone levels to be both heritable (0.160 ± 0.064 s.e.) and correlated between the sexes (0.942 ± 0.648 s.e.) in wild red deer calves (Cervus elaphus). This may have important evolutionary implications if, as in adults, the sexes have divergent optima for circulating testosterone levels.

SUBMITTER: Pavitt AT 

PROVIDER: S-EPMC4261863 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature