Segmental and tandem chromosome duplications led to divergent evolution of the<i>chalcone synthase</i>gene family in<i>Phalaenopsis</i>orchids

Abstract

Based on their phylogenetic relationships, expression clustering analysis and chromosomal distributions of the five paralogous PaCHS genes, we proposed that expansion of this gene family in P. aphrodite occurred through segmental duplications, followed by tandem duplications. These findings provide information for further studies of CHS functions and regulations, and shed light on the divergence of an important gene family in orchids.