Molecular Evolution of cycloidea-Like Genes in Fabaceae

Tatsuya Fukuda, Jun Yokoyama, Masayuki Maki

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25 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)588-597
Number of pages10
JournalJournal of Molecular Evolution
Issue number5
Publication statusPublished - 2003 Nov


  • CYC-like gene
  • Floral symmetry
  • Gene duplication
  • Legume
  • Papilionoid flower
  • TCP gene family


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