title: Molecular evolution of cycloidea-like genes in Fabaceae.
abstract: The cycloidea (CYC) gene controls floral symmetry in snapdragon (Antirrhinum majus). We investigated the evolution of CYC-like genes in some species of legumes that have zygomorphic flowers. Two to four CYC-like genes were isolated from a single species. The results of NJ and ML analyses indicate that CYC-like genes in legumes group into two monophyletic clades; one group consists of eight CYC-like genes (Clade 1) and the other contains three CYC-like genes and TB1 of maize (Clade 2). These phylogenetic trees and the Shimodaira-Hasegawa test suggest that Clade 1 is a sister of the original CYC group (Clade 3). Moreover, the result of the GeneTree analysis showed that the CYC-like genes experienced repeated duplication events during the evolution of legumes. We herein speculate as to the role of CYC-like genes in legumes and discuss the evolutionary processes that these genes have undergone.
authors.affiliation: Biological Institute, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan. fukuda@mail.cc.tohoku.ac.jp
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Fukuda
authors.forename: Jun
authors.initials: J
authors.lastname: Yokoyama
authors.forename: Masayuki
authors.initials: M
authors.lastname: Maki
mesh_terms: D000595:Amino Acid Sequence; D004268:DNA-Binding Proteins; D019143:Evolution, Molecular; D007887:Fabaceae / Q000235:genetics*; D035264:Flowers / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics*; D017434:Protein Structure, Tertiary; D014157:Transcription Factors
chemical_list: D004268:DNA-Binding Proteins; D010940:Plant Proteins; D014157:Transcription Factors; C101995:cycloidea protein, Antirrhinum