Figure 2.

Phylogenies of Adh1 and Adh2 genes of rice species. (A) Adh1 gene phylogeny. The strict consensus tree of two equally most parsimonious trees (tree length = 1,256, CI = 0.75, RI = 0.87). (B) Adh2 gene phylogeny. The strict consensus tree of four equally most parsimonious trees (tree length = 972, CI = 0.76, RI = 0.88). Numbers are bootstrap percentages above 50%. Branch lengths are proportional to the number of nucleotide substitutions, and scale bars indicate 10 substitutions. Small capital letters following a species name indicate the previously recognized genome type of the species. On each Adh gene tree, the appearance twice of an allotetraploid species represents two distinct types of sequences cloned from the same individual of the species. The genome type of a monophyletic group is indicated.