<p>This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</p> <p>The rapidly accumulating genome sequence data from the plant <italic>Arabidopsis thaliana</italic> allows more detailed analysis of genome content and organisation than ever bafore possible in plants. The genome shows a surprisingly high level of genetic redundancy, with as many as 75% of gene products showing signficant homology to another protien of <italic>A. thaliana.</italic> Many duplicated genes occur in arrays of conserved order and indicate that <italic>A. thaliana</italic> is likely to have had a tetraploid ancestor. Analysis of the divergence of duplicated genome segments leads to the prediction of two major modes of plant genome evolution: macro-scale duplication and rearrangement of chromosomes and micro-scale translocation, duplication and loss of individual genes or small groups of genes.</p>
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Yeast. 2000; 17(1):1-5