A phylogenetic tree based on MADS, I- and K-domains of deduced proteins. The local bootstrap probability is shown on branches where available. This tree is an unrooted tree. MIKCC-type genes are divided into 13 subfamilies, including gymnosperm-specific DAL10-like subfamily, on the basis of this tree. The genus from which each transcript was isolated is indicated after the deduced protein name. Deduced proteins from C. japonica that were identified in the present study are indicated in red. Deduced proteins from gymnosperms other than C. japonica are indicated in blue, and deduced proteins from basal angiosperms are indicated in green.