Contribution of chromosomal polymorphisms to the G-matrix of Mimulus guttatus.

ABSTRACT: Evolution of genetic (co)variances (the G-matrix) fundamentally influences multitrait divergence. Here, we isolated the contribution of two chromosomal quantitative trait loci (QTLs), a meiotic drive locus and a polymorphic inversion, to the overall G-matrix for a suite of floral, phenological and male fitness traits in a population of Mimulus guttatus. This allowed us to predict the evolution of trait means and genetic (co)variances as a function of allele frequencies, and to evaluate theories about the maintenance of genetic variation in fitness. Individuals generated using a replicated F(2) breeding design were grown under common conditions, genotyped and measured for trait values. Significant additive genetic variance existed for all traits, and most genetic covariances were significan

SUBMITTER: Scoville A 

PROVIDER: S-EPMC5958605 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature