title: Evolution of the chalcone synthase gene family in the genus Ipomoea.
abstract: The evolution of the chalcone synthase [CHS; malonyl-CoA:4-coumaroyl-CoA malonyltransferase (cyclizing), EC 2.3.1.74] multigene family in the genus Ipomoea is explored. Thirteen CHS genes from seven Ipomoea species (family Convolvulaceae) were sequenced--three from genomic clones and the remainder from PCR amplification with primers designed from the 5' flanking region and the end of the 3' coding region of Ipomoea purpurea Roth. Analysis of the data indicates a duplication of CHS that predates the divergence of the Ipomoea species in this study. The Ipomoea CHS genes are among the most rapidly evolving of the CHS genes sequenced to date. The CHS genes in this study are most closely related to the Petunia CHS-B gene, which is also rapidly evolving and highly divergent from the rest of the Petunia CHS sequences.
authors.affiliation: Department of Botany and Plant Sciences, University of California, Riverside 92521-0124, USA.
authors.forename: M L
authors.initials: ML
authors.lastname: Durbin
authors.forename: G H
authors.initials: GH
authors.lastname: Learn
authors.forename: G A
authors.initials: GA
authors.lastname: Huttley
authors.forename: M T
authors.initials: MT
authors.lastname: Clegg
mesh_terms: D000217:Acyltransferases / Q000235:genetics*; D001483:Base Sequence; D005419:Flavonoids / Q000096:biosynthesis; D017343:Genes, Plant / Q000235:genetics*; D015698:Genomic Library; D008969:Molecular Sequence Data; D005810:Multigene Family / Q000235:genetics*; D010802:Phylogeny; D010944:Plants / Q000145:classification / Q000235:genetics; D016133:Polymerase Chain Reaction; D011544:Pseudogenes / Q000235:genetics; D017422:Sequence Analysis, DNA; D017385:Sequence Homology; D014675:Vegetables / Q000235:genetics*
chemical_list: D005419:Flavonoids; D000217:Acyltransferases; C020141:flavanone synthetase