Genomic expression dominance in allopolyploids.

ABSTRACT:

Background

Allopolyploid speciation requires rapid evolutionary reconciliation of two diverged genomes and gene regulatory networks. Here we describe global patterns of gene expression accompanying genomic merger and doubling in inter-specific crosses in the cotton genus (Gossypium L.).

Results

Employing a micro-array platform designed against 40,430 unigenes, we assayed gene expression in two sets of parental diploids and their colchicine-doubled allopolyploid derivatives. Up to half of all genes were differentially expressed among diploids, a striking level of expression evolution among congeners. In the allopolyploids, most genes were expressed at mid-parent levels, but this was achieved via a phenomenon of genome-wide expression dominance, whereby gene expression was eit

SUBMITTER: Rapp RA 

PROVIDER: S-EPMC2684529 | biostudies-literature | 2009 May

REPOSITORIES: biostudies-literature