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Originally published as Genetics Published Articles Ahead of Print on May 15, 2006.
Genetics, Vol. 173, 1823-1827, July 2006, Copyright © 2006
doi:10.1534/genetics.106.058271
A Novel Approach for Characterizing Expression Levels of Genes Duplicated by Polyploidy
Joshua A. Udall*,1,
Jordan M. Swanson*,2,
Dan Nettleton
,
Ryan J. Percifield* and
Jonathan F. Wendel*
* Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa 50011 and Department of Statistics, Iowa State University, Ames, Iowa 50011
1 Corresponding author: Iowa State University, 251 Bessey Hall, Ames, IA 50011.
E-mail: jaudall{at}iastate.edu
Studying gene expression in polyploids is complicated by genomewide gene duplication and the problem of distinguishing transcript pools derived from each of the two homeologous genomes such as the A- and D-genomes of allotetraploid Gossypium. Short oligonucleotide probes designed to specifically target several hundred homeologous gene pairs of Gossypium were printed on custom NimbleGen microarrays. These results demonstrate that relative expression levels of homeologous genes may be measured by microarrays and that deviation from equal expression levels of homeologous loci may be common in the allotetraploid nucleus of Gossypium.
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