Complexity of genome evolution by segmental rearrangement in Brassica rapa revealed by sequence-level analysis.

ABSTRACT:

Background

The Brassica species, related to Arabidopsis thaliana, include an important group of crops and represent an excellent system for studying the evolutionary consequences of polyploidy. Previous studies have led to a proposed structure for an ancestral karyotype and models for the evolution of the B. rapa genome by triplication and segmental rearrangement, but these have not been validated at the sequence level.

Results

We developed computational tools to analyse the public collection of B. rapa BAC end sequence, in order to identify candidates for representing collinearity discontinuities between the genomes of B. rapa and A. thaliana. For each putative discontinuity, one of the BACs was sequenced and analysed for collinearity with the genome of A. thaliana. Additio

SUBMITTER: Trick M 

PROVIDER: S-EPMC2783169 | biostudies-literature | 2009 Nov

REPOSITORIES: biostudies-literature