title: Congruence of microsatellite and mitochondrial DNA variation in acrobat ants (Crematogaster subgenus Decacrema, Formicidae: Myrmicinae) inhabiting Macaranga (Euphorbiaceae) myrmecophytes.
abstract: A previously reported mitochondrial DNA (mtDNA) phylogeny of Crematogaster (subgenus Decacrema) ants inhabiting Macaranga myrmecophytes indicated that the partners diversified synchronously and their specific association has been maintained for 20 million years. However, the mtDNA clades did not exactly match morphological species, probably owing to introgressive hybridization among younger species. In this study, we determined the congruence between nuclear simple sequence repeat (SSR, also called microsatellite) genotyping and mtDNA phylogeny to confirm the suitability of the mtDNA phylogeny for inferring the evolutionary history of Decacrema ants. Analyses of ant samples from Lambir Hills National park, northeastern Borneo, showed overall congruence between the SSR and mtDNA groupings, indicating that mtDNA markers are useful for delimiting species, at least at the local level. We also found overall high host-plant specificity of the SSR genotypes of Decacrema ants, consistent with the specificity based on the mtDNA phylogeny. Further, we detected cryptic genetic assemblages exhibiting high specificity toward particular plant species within a single mtDNA clade. This finding, which may be evidence for rapid ecological and genetic differentiation following a host shift, is a new insight into the previously suggested long-term codiversification of Decacrema ants and Macaranga plants.
authors.affiliation: Department of Biology, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Shouhei
authors.initials: S
authors.lastname: Ueda
authors.affiliation: Department of Biology, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Nagano
authors.affiliation: Department of Biology, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Yowsuke
authors.initials: Y
authors.lastname: Kataoka
authors.affiliation: Department of Biology, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Komatsu
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan; Graduate School of Global Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan.
authors.forename: Takao
authors.initials: T
authors.lastname: Itioka
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan.
authors.forename: Usun
authors.initials: U
authors.lastname: Shimizu-Kaya
authors.affiliation: Division of Natural Sciences, Department of Arts and Sciences, Faculty of Education, Osaka Kyoiku University 4-698-1 Asahigaoka, Kashiwara, Osaka, 582-8582, Japan.
authors.forename: Yoko
authors.initials: Y
authors.lastname: Inui
authors.affiliation: Department of Biology, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan; Institute of Mountain Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Takao
authors.initials: T
authors.lastname: Itino
mesh_terms: D000818:Animals; D001000:Ants / Q000235:genetics* / Q000502:physiology*; D016000:Cluster Analysis; D004272:DNA, Mitochondrial / Q000235:genetics*; D019665:Euphorbiaceae; D014644:Genetic Variation; D060005:Genotyping Techniques; D058507:Host Specificity; D018895:Microsatellite Repeats / Q000235:genetics*; D010802:Phylogeny; D013559:Symbiosis / Q000235:genetics*
chemical_list: D004272:DNA, Mitochondrial