Detecting signals of adaptive evolution in grape plastomes with a focus on the Cretaceous-Palaeogene (K/Pg) transition.

ABSTRACT:

Background and aims

Although plastid genes are widely used in phylogenetic studies, signals of positive selection have been scarcely investigated in the grape family. The plastomes from 91 accessions of Vitaceae were examined to understand the extent to which positive selection is present and to identify which genes are involved. Moreover, the changes through time of genes under episodic positive selection were investigated and the hypothesis of an adaptive process following the Cretaceous-Palaeogene (K/Pg) transition about 66 million years ago was tested.

Methods

Different codon-substitution models were used to assess pervasive and episodic positive selection events on 70 candidate plastid genes. Divergence times between lineages were estimated and stochastic character mapp

SUBMITTER: Zecca G 

PROVIDER: S-EPMC9851337 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature