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Author (up) Tuda, M.; Ronn, J.; Buranapanichpan, S.; Wasano, N.; Arnqvist, G. url  doi
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  Title Evolutionary diversification of the bean beetle genus Callosobruchus (Coleoptera: Bruchidae): traits associated with stored-product pest status Type Journal Article
  Year 2006 Publication Molecular Ecology Abbreviated Journal Mol Ecol  
  Volume 15 Issue 12 Pages 3541-3551  
  Keywords Adaptation, Physiological; Animals; Beetles/*classification/genetics/physiology; Climate; *Evolution; Fabaceae; Feeding Behavior; Genes, Mitochondrial; Phylogeny; Reproduction/physiology  
  Abstract Despite the fact that many plant-feeding insects are pests, little effort has been made to identify key evolutionary trait transitions that allow taxa to acquire or lose pest status. A large proportion of species in the genus Callosobruchus are economically important pests of stored, dry postharvest beans of the tribe Phaseoleae. However, the evolution of this feeding habit is poorly understood. Here, we present a reconstruction of the phylogeny of the Asian and African Callosobruchus based on three mitochondrial genes, and assess which traits have been associated with the evolutionary origin or loss of ability to reproduce on dry beans. Our phylogenetic analysis showed that species group into the chinensis and the maculatus clades, which are also supported by genital morphology, and an additional paraphyletic group. Ancestral ability to use dry beans has been lost in the chinensis clade but acquired again in C. chinensis. Dry-bean use and host-plant use were both phylogenetically constrained and transitions in the two were significantly correlated. Host shifts from the subtribe Phaseolinae to Cajaninae were more common than the reverse and were more likely in species using young beans. The ability to use dry beans was more likely gained when using Phaseolinae hosts and promoted habitat shifts from tropical to temperate regions. Adaptation to arid climate was also associated with the ability to reproduce on dry beans and on Phaseolinae. Thus, our analysis suggests that physiological adaptations to an arid climate and to Phaseolinae hosts both render beetles predisposed to become pests of cultivated beans.  
  Address Institute of Biological Control, Faculty of Agriculture, Kyushu University, Fukuoka 812-8581, Japan. tuda@grt.kyushu-u.ac.jp  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0962-1083 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:17032256 Approved no  
  Call Number GGC @ mschluet @ Serial 24  
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