Whole genome duplication and transposable element proliferation drive genome expansion in Corydoradinae catfishes.

ABSTRACT: Genome size varies significantly across eukaryotic taxa and the largest changes are typically driven by macro-mutations such as whole genome duplications (WGDs) and proliferation of repetitive elements. These two processes may affect the evolutionary potential of lineages by increasing genetic variation and changing gene expression. Here, we elucidate the evolutionary history and mechanisms underpinning genome size variation in a species-rich group of Neotropical catfishes (Corydoradinae) with extreme variation in genome size-0.6 to 4.4 pg per haploid cell. First, genome size was quantified in 65 species and mapped onto a novel fossil-calibrated phylogeny. Two evolutionary shifts in genome size were identified across the tree-the first between 43 and 49 Ma (95% highest posterior density (H

SUBMITTER: Marburger S 

PROVIDER: S-EPMC5829208 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature