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

BMC Genomics
Martin TrickIan Bancroft

Abstract

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. 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. Additional BAC clones were identified and sequenced as part of ongoing efforts to sequence four chromosomes of B. rapa. Strikingly few of the 19 inter-chromosomal rearrangements corresponded to the set of collinearity discontinuities anticipated on the basis of previous studies. Our analyses revealed numerous instances of newly detected collinearity blocks. For B. rapa linkage group A8, we were able to develop a model for the derivation of the chromosome from the ancestral karyotype....Continue Reading

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Citations

Apr 21, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·P LouC R McClung
Jul 16, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Congcong JiangJinling Meng
Dec 27, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Hans-Joachim HarloffChristian Jung
Aug 6, 2011·DNA Research : an International Journal for Rapid Publication of Reports on Genes and Genomes·Feng LiTakeshi Nishio
Nov 16, 2010·Genome Génome / Conseil National De Recherches Canada·Isobel A P ParkinAndrew G Sharpe
Jan 11, 2011·Genome Génome / Conseil National De Recherches Canada·Matthew N NelsonDerek J Lydiate
Apr 13, 2010·BMC Plant Biology·Pauline StephensonLars Østergaard
Sep 30, 2010·Genome Biology·Jeong-Hwan MunBeom-Seok Park
Mar 30, 2011·The Plant Journal : for Cell and Molecular Biology·J S Pat Heslop-Harrison, Trude Schwarzacher
Mar 8, 2018·Journal of Experimental Botany·Andrej A ArsovskiJennifer L Nemhauser
Jan 1, 2014·Horticulture Research·Feng ChengXiaowu Wang
May 9, 2013·The Plant Cell·Feng ChengXiaowu Wang

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