Genomic, regulatory and epigenetic mechanisms underlying duplicated gene evolution in the natural allotetraploid Oryza minuta.

ABSTRACT:

Background

Polyploid species contribute to Oryza diversity. However, the mechanisms underlying gene and genome evolution in Oryza polyploids remain largely unknown. The allotetraploid Oryza minuta, which is estimated to have formed less than one million years ago, along with its putative diploid progenitors (O. punctata and O. officinalis), are quite suitable for the study of polyploid genome evolution using a comparative genomics approach.

Results

Here, we performed a comparative study of a large genomic region surrounding the Shattering4 locus in O. minuta, as well as in O. punctata and O. officinalis. Duplicated genomes in O. minuta have maintained the diploid genome organization, except for several structural variations mediated by transposon movement. Tandem duplicated

SUBMITTER: Sui Y 

PROVIDER: S-EPMC3890553 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature