Plant & Animal Genomes XVII Conference Plant & Animal Genomes XVII ConferenceJanuary 10-14, 2009
Town & Country Convention Center
San Diego, CA
Xiyin Wang , Haibao Tang , John E. Bowers , Lifeng Lin , Andrew H. Paterson
Whole genome and segmental DNA duplications have been relatively frequent in angiosperm evolutionary history, contributing much gene redundancy and providing raw material for the evolution of genetic novelty. PGDD (Plant Genome Duplication Database) provides a comprehensive repository of genomic duplication patterns identified by standardized methods in available plant genomes of thale cress, poplar, rice, grape, papaya and sorghum, as well as cross-genomic correspondence inferred based on gene colinearity. The homologous chromosomal blocks provide valuable information about genome structural evolution, and identify potentially-homologous genes based on physical location in addition to sequence similarity. Based on PGDD, comparative analysis of rice and sorghum reveals that many paralogous genes, produced by a whole genome duplication event ~70 million years ago (mya) in a common ancestor, have been undergoing concerted evolution in each species since the two species diverged ~50 mya. Illegitimate recombination may have contributed to genetic novelties. PGDD is publicly accessible at http://chibba.agtec.uga.edu/duplication/.