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Journal of Heredity Advance Access published online on March 2, 2008
Journal of Heredity, doi:10.1093/jhered/esn010
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© The American Genetic Association. 2008. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Fractionation of Synteny in a Genomic Region Containing Tandemly Duplicated Genes across Glycine max, Medicago truncatula, and Arabidopsis thaliana

Jessica A. Schlueter, Brian E. Scheffler, Scott Jackson, and Randy C. Shoemaker

From the Department of Agronomy, Purdue University, West Lafayette, IN 47907 (Schlueter and Jackson); the USDA-ARS-MSA Genomics Laboratory, Stoneville, MS 38766 (Scheffler); and the USDA-ARS-CICGR, Ames, IA 50011 (Shoemaker)

Address correspondence to R. C. Shoemaker at the address above, or e-mail: randy.shoemaker{at}ars.usda.gov.

Extended comparison of gene sequences found on homeologous soybean Bacterial Artificial Chromosomes to Medicago truncatula and Arabidopsis thaliana genomic sequences demonstrated a network of synteny within conserved regions interrupted by gene addition and/or deletions. Consolidation of gene order among all 3 species provides a picture of ancestral gene order. The observation supports a genome history of fractionation resulting from gene loss/addition and rearrangement. In all 3 species, clusters of N-hydroxycinnamoyl/benzoyltransferase genes were identified in tandemly duplicated clusters. Parsimony-based gene trees suggest that the genes within the arrays have independently undergone tandem duplication in each species.

Corresponding Editor: Reid Palmer

Received July 12, 2007
Accepted January 11, 2008


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