Reciprocal silencing, transcriptional bias and functional divergence of homeologs in polyploid cotton (gossypium).

ABSTRACT: Polyploidy is an important force in the evolution of flowering plants. Genomic merger and doubling induce an extensive array of genomic effects, including immediate and long-term alterations in the expression of duplicate genes ("homeologs"). Here we employed a novel high-resolution, genome-specific, mass-spectrometry technology and a well-established phylogenetic framework to investigate relative expression levels of each homeolog for 63 gene pairs in 24 tissues in naturally occurring allopolyploid cotton (Gossypium L.), a synthetic allopolyploid of the same genomic composition, and models of the diploid progenitor species. Results from a total of 2177 successful expression assays permitted us to determine the extent of expression evolution accompanying genomic merger of divergent diploid

SUBMITTER: Chaudhary B 

PROVIDER: S-EPMC2691759 | biostudies-literature | 2009 Jun

REPOSITORIES: biostudies-literature