CenH3 evolution in diploids and polyploids of three angiosperm genera.

ABSTRACT:

Background

Centromeric DNA sequences alone are neither necessary nor sufficient for centromere specification. The centromere specific histone, CenH3, evolves rapidly in many species, perhaps as a coevolutionary response to rapidly evolving centromeric DNA. To gain insight into CenH3 evolution, we characterized patterns of nucleotide and protein diversity among diploids and allopolyploids within three diverse angiosperm genera, Brassica, Oryza, and Gossypium (cotton), with a focus on evidence for diversifying selection in the various domains of the CenH3 gene. In addition, we compare expression profiles and alternative splicing patterns for CenH3 in representatives of each genus.

Results

All three genera retain both duplicated CenH3 copies, while Brassica and Gossypium exhibi

SUBMITTER: Masonbrink RE 

PROVIDER: S-EPMC4308911 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature