A polygenic architecture with habitat-dependent effects underlies ecological differentiation in Silene.

ABSTRACT: Ecological differentiation can drive speciation but it is unclear how the genetic architecture of habitat-dependent fitness contributes to lineage divergence. We investigated the genetic architecture of cumulative flowering, a fitness component, in second-generation hybrids between Silene dioica and Silene latifolia transplanted into the natural habitat of each species. We used reduced-representation sequencing and Bayesian sparse linear mixed models (BSLMMs) to analyze the genetic control of cumulative flowering in each habitat. Our results point to a polygenic architecture of cumulative flowering. Allelic effects were mostly beneficial or deleterious in one habitat and neutral in the other. Positive-effect alleles often were derived from the native species, whereas negative-effect allele

SUBMITTER: Gramlich S 

PROVIDER: S-EPMC9544174 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature