Molecular population genetics and gene expression analysis of duplicated CBF genes of Arabidopsis thaliana.

ABSTRACT:

Background

CBF/DREB duplicate genes are widely distributed in higher plants and encode transcriptional factors, or CBFs, which bind a DNA regulatory element and impart responsiveness to low temperatures and dehydration.

Results

We explored patterns of genetic variations of CBF1, -2, and -3 from 34 accessions of Arabidopsis thaliana. Molecular population genetic analyses of these genes indicated that CBF2 has much reduced nucleotide diversity in the transcriptional unit and promoter, suggesting that CBF2 has been subjected to a recent adaptive sweep, which agrees with reports of a regulatory protein of CBF2. Investigating the ratios of Ka/Ks between all paired CBF paralogus genes, high conservation of the AP2 domain was observed, and the major divergence of proteins was the r

SUBMITTER: Lin YH 

PROVIDER: S-EPMC2588587 | biostudies-literature | 2008 Nov

REPOSITORIES: biostudies-literature