14
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      The mitochondrial cytochrome oxidase II gene in Bacillus stick insects: ancestry of hybrids, androgenesis, and phylogenetic relationships.

      Molecular Phylogenetics and Evolution
      Androgens, biosynthesis, Animals, DNA, Mitochondrial, chemistry, genetics, Electron Transport Complex IV, Evolution, Molecular, Female, Geography, Haplotypes, Hybridization, Genetic, Insects, classification, metabolism, Male, Molecular Sequence Data, Phylogeny

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Sequencing of a cytochrome oxidase II (COII) gene fragment in Bacillus taxa provided evidence that the bisexual B. rossius is the maternal ancestor of the hybridogenetic B. rossius-grandii strains and revealed the same ancestry for both parthenogenetic hybrids: the diploid B. whitei (B. rossius/grandii grandii) and the triploid B. lynceorum (B. rossius/grandii grandii/atticus). Present data clearly demonstrate that all Bacillus unisexuals arose through asymmetrical hybridization events and realized a paraphyletic derivation from the B. rossius redtenbacheri subspecies. The invention of B. rossius mitochondrial DNA haplotypes in specimens with B. grandii grandii nuclear genomes revealed the occurrence of androgenesis in nature. Natural androgens represent a peculiar escape from hybridity and can help maintain the hybridogenetic system through the production of the fathering taxon via hybrid females. Results from the COII gene support the phyletic relationships among taxa suggested by previous taxonomical approaches, but also indicate a departure of B. grandii subspecies from the established taxonomy. Assuming the existence of a molecular clock, the evaluated substitution rate brings the splitting between B. rossius and B. grandii/B. atticus back to 22.79 +/- 2.65 myr before present, while the origin of hybrids appears to be much more recent (1.06 +/- 0.53 myr). Copyright 2001 Academic Press.

          Related collections

          Author and article information

          Comments

          Comment on this article