Homoeolog-specific retention and use in allotetraploid Arabidopsis suecica depends on parent of origin and network partners.

ABSTRACT:

Background

Allotetraploids carry pairs of diverged homoeologs for most genes. With the genome doubled in size, the number of putative interactions is enormous. This poses challenges on how to coordinate the two disparate genomes, and creates opportunities by enhancing the phenotypic variation. New combinations of alleles co-adapt and respond to new environmental pressures. Three stages of the allopolyploidization process--parental species divergence, hybridization, and genome duplication--have been well analyzed. The last stage of evolutionary adjustments remains mysterious.

Results

Homoeolog-specific retention and use were analyzed in Arabidopsis suecica (As), a species derived from A. thaliana (At) and A. arenosa (Aa) in a single event 12,000 to 300,000 years ago. We used

SUBMITTER: Chang PL 

PROVIDER: S-EPMC3046485 | biostudies-literature | 2010

REPOSITORIES: biostudies-literature