Phylogenetic Relationships of 11 Bumblebee Species (Hymenoptera: Apidae) Based on Mitochondrial Cytochrome b Gene Sequences
细胞色素b基因序列与11种熊蜂的系统进化

Phylogenetic relationships of 11 bumblebee species, including 5 subgenera: Bombus (5 species), Tho-racobombus (3 species), Mendacibombus (1 species), Fervidobombus (1 species) and Pyrobombus (1 species), wereanalyzed based on the 357 bp mitochondrial cytochrome b gene sequences. There are 65 singleton polymorphic sites and71 parsimony informative polymorphic sites in this DNA segment, and 45 polymorphic sites within the total 119 translatedamino acids segment. Both NJ tree and MP tree show that Mendacibombus (B. avinovielllus ) is basal to others, followedby Fervidobombus ( B . pensylvanicus ); Pyrobombus ( B . impatiens ) and Bombus are sister subgenera; the subgenus ofBombus is monophyletic, in which B. ignitus diverged first.