Gradual genome size evolution and polyploidy in Allium from the Qinghai-Tibetan Plateau.

ABSTRACT:

Background and aims

Genome size is an important plant trait, with substantial interspecies variation. The mechanisms and selective pressures underlying genome size evolution are important topics in evolutionary biology. There is considerable diversity in Allium from the Qinghai-Tibetan Plateau, where genome size variation and related evolutionary mechanisms are poorly understood.

Methods

We reconstructed the Allium phylogeny using DNA sequences from 71 species. We also estimated genome sizes of 62 species, and determined chromosome numbers in 65 species. We examined the phylogenetic signal associated with genome size variation, and tested how well the data fit different evolutionary models. Correlations between genome size variations and seed mass, altitude and 19 bioclimati

SUBMITTER: Wang G 

PROVIDER: S-EPMC9904346 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature