Selection at a genomic region of major effect is responsible for evolution of complex life histories in anadromous steelhead.

ABSTRACT:

Background

Disparity in the timing of biological events occurs across a variety of systems, yet the understanding of genetic basis underlying diverse phenologies remains limited. Variation in maturation timing occurs in steelhead trout, which has been associated with greb1L, an oestrogen target gene. Previous techniques that identified this gene only accounted for about 0.5-2.0% of the genome and solely investigated coastal populations, leaving uncertainty on the genetic basis of this trait and its prevalence across a larger geographic scale.

Results

We used a three-tiered approach to interrogate the genomic basis of complex phenology in anadromous steelhead. First, fine scale mapping with 5.3 million SNPs from resequencing data covering 68% of the genome confirmed a 309-kb

SUBMITTER: Micheletti SJ 

PROVIDER: S-EPMC6139179 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature