Convergent evolution in Arabidopsis halleri and Arabidopsis arenosa on calamine metalliferous soils.

ABSTRACT: It is a plausible hypothesis that parallel adaptation events to the same environmental challenge should result in genetic changes of similar or identical effects, depending on the underlying fitness landscapes. However, systematic testing of this is scarce. Here we examine this hypothesis in two closely related plant species, Arabidopsis halleri and Arabidopsis arenosa, which co-occur at two calamine metalliferous (M) sites harbouring toxic levels of the heavy metals zinc and cadmium. We conduct individual genome resequencing alongside soil elemental analysis for 64 plants from eight populations on M and non-metalliferous (NM) soils, and identify genomic footprints of selection and local adaptation. Selective sweep and environmental association analyses indicate a modest degree of gene as

SUBMITTER: Preite V 

PROVIDER: S-EPMC6560266 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature