Nested whole-genome duplications coincide with diversification and high morphological disparity in Brassicaceae.

ABSTRACT: Angiosperms have become the dominant terrestrial plant group by diversifying for ~145 million years into a broad range of environments. During the course of evolution, numerous morphological innovations arose, often preceded by whole genome duplications (WGD). The mustard family (Brassicaceae), a successful angiosperm clade with ~4000 species, has been diversifying into many evolutionary lineages for more than 30 million years. Here we develop a species inventory, analyze morphological variation, and present a maternal, plastome-based genus-level phylogeny. We show that increased morphological disparity, despite an apparent absence of clade-specific morphological innovations, is found in tribes with WGDs or diversification rate shifts. Both are important processes in Brassicaceae, resultin

SUBMITTER: Walden N 

PROVIDER: S-EPMC7393125 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature