Classification of the genus Caulokaempferia K.Larsen (Zingiberaceae) based on the molecular phylogenetic analysis (Thai)

Abstract

The phylogenetic analysis of the subfamily Zingiberoideae was revised, using nuclear ribosomal DNA internal
transcribed spacer (ITS-1, 5.8S, and ITS-2) sequences in attempt to clarify the taxonomic position of the genus
Caulokaempferia.The Maximum Parsimony analysis conducted using PAUP*4.0b10 resulted in Caulokaempferia being polyphyletic group with C. violacea allied to Boesenbergia rotunda , whereas C. appendiculata,C. coenobialis,C. saxicolaandC.sp.are placed withinthe same clade. The addition of C. appendiculata failed to resolve the placement of the genus into any tribe. It interestingly guides to the possibility of placing the yellow-flowered group of species to a new tribe.