Unbiased subgenome evolution following a recent whole-genome duplication in pear (Pyrus bretschneideri Rehd.).

ABSTRACT: Genome fractionation (also known as diploidization) frequently occurs following paleopolyploidization events. Biased fractionation between subgenomes has been found in some paleo-allopolyploids, while this phenomenon is absent in paleo-autopolyploids. Pear (Pyrus bretschneideri Rehd.) experienced a recent whole-genome duplication (WGD, ~30 million years ago); however, the evolutionary fate of the two subgenomes derived from this WGD event is not clear. In this study, we identified the two paleo-subgenomes in pear using peach (Prunus persica) as an outgroup and investigated differences in the gene loss rate, evolutionary rate, gene expression level, and DNA methylation level between these two subgenomes. Fractionation bias was not found between the two pear subgenomes, which e

SUBMITTER: Li Q 

PROVIDER: S-EPMC6395616 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature