title: Phylogenetic analyses of fat body endosymbionts reveal differences in invasion times of blaberid wood-feeding cockroaches (Blaberidae: Panesthiinae) into the Japanese archipelago.
abstract: Cockroaches have endosymbiotic bacteria in their fat bodies. Recent molecular phylogenetic analyses on both hosts and endosymbionts have revealed that co-evolution has occurred throughout the history of cockroaches and termites. Co-cladogenesis was also shown among closely related taxa (woodroach genus Cryptocercus; Cryptocercidae), and thus endosymbiont data are likely to be useful for biogeographical analyses. To test the possibility of co-cladogenesis among inter-and intraspecific taxa, as well as the utility of endosymbiont data for inferring biogeographical scenarios, we analyzed rRNA genes of endosymbionts of Japanese and Taiwanese Panesthiinae (Salganea and Panesthia; Blaberidae), on which phylogenetic analyses previously had been performed based on the mitochondrial genes. Statistical analyses on the topologies inferred from both endosymbiont and host mitochondria genes showed that co-cladogenesis has occurred. The endosymbiont sequences examined appear to have evolved in a clock-like manner, and their rate of evolution based on the host fossil data showed a major difference in the time of invasion of the two Japanese genera, that is congruent with the recent analyses of their mitochondrial genes.
authors.affiliation: Faculty of Science, Toyama University, Gofuku, Japan. kmaekawa@sci.toyama-u.ac.jp
authors.forename: Kiyoto
authors.initials: K
authors.lastname: Maekawa
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kon
authors.forename: Tadao
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Kunio
authors.initials: K
authors.lastname: Araya
authors.forename: Nathan
authors.initials: N
authors.lastname: Lo
mesh_terms: D000818:Animals; D001483:Base Sequence; D001499:Bayes Theorem; D003058:Cockroaches / Q000382:microbiology* / Q000502:physiology*; D003710:Demography; D019143:Evolution, Molecular; D005216:Fat Body / Q000382:microbiology*; D041965:Flavobacteriaceae / Q000235:genetics*; D005843:Geography; D007564:Japan; D016013:Likelihood Functions; D008957:Models, Genetic; D008969:Molecular Sequence Data; D010802:Phylogeny; D011157:Population Dynamics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013559:Symbiosis
chemical_list: D012336:RNA, Ribosomal, 16S