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Haibao Tang,1John E. Bowers,1Xiyin Wang,1Ray Ming,2Maqsudul Alam,3Andrew H. Paterson1*
Correlated gene arrangements among taxa provide a valuable frameworkfor inference of shared ancestry of genes and for the utilizationof findings from model organisms to study less-well-understoodsystems. In angiosperms, comparisons of gene arrangements arecomplicated by recurring polyploidy and extensive genome rearrangement.New genome sequences and improved analytical approaches areclarifying angiosperm evolution and revealing patterns of differentialgene loss after genome duplication and differential gene retentionassociated with evolution of some morphological complexity.Because of variability in DNA substitution rates among taxaand genes, deviation from collinearity might be a more reliablephylogenetic character.
1 Plant Genome Mapping Laboratory, University of Georgia, Athens, GA 30602, USA. 2 Department of Plant Biology, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA. 3 Advanced Studies in Genomics, Proteomics, and Bioinformatics Unit, University of Hawaii, Honolulu, HI 96822, USA.
* To whom correspondence should be addressed. E-mail: paterson{at}uga.edu
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