Auxin response factor gene family in Brassica rapa: genomic organization, divergence, expression, and evolution.

ABSTRACT: Completion of the sequencing of the Brassica rapa genome enabled us to undertake a genome-wide identification and functional study of the gene families related to the morphological diversity and agronomic traits of Brassica crops. In this study, we identified the auxin response factor (ARF) gene family, which is one of the key regulators of auxin-mediated plant growth and development in the B. rapa genome. A total of 31 ARF genes were identified in the genome. Phylogenetic and evolutionary analyses suggest that ARF genes fell into four major classes and were amplified in the B. rapa genome as a result of a recent whole genome triplication after speciation from Arabidopsis thaliana. Despite its recent hexaploid ancestry, B. rapa includes a relatively small number of ARF genes compared with

SUBMITTER: Mun JH 

PROVIDER: S-EPMC3459075 | biostudies-literature | 2012 Oct

REPOSITORIES: biostudies-literature