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Evolutionary diversification of the bean beetle genus Callosobruchus (Coleoptera: Bruchidae): Traits associated with stored-product pest status
Institute of Biological Control, Kyushu University, Japan.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Animal Ecology.
Department of Entomology, Chiang Mai University, Thailand.
Biotechnology & Food Research Institute, Japan.
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2006 (English)In: Molecular Ecology, ISSN 0962-1083, E-ISSN 1365-294X, Vol. 15, no 12, 3541-3551 p.Article in journal (Refereed) Published
Abstract [en]

Despite the fact that many plant-feeding insects are pests, little effort has been paid to elucidating 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 post-harvest 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. 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 associated with ability to reproduce on dry beans and on Phaseolinae. Thus, our analysis suggests that physiological adaptations to arid season and to Phaseolinae hosts both render beetles predisposed to become pests of cultivated beans.

Place, publisher, year, edition, pages
2006. Vol. 15, no 12, 3541-3551 p.
Keyword [en]
Bayesian inference, COI and COII, Fabaceae, host-plant shift, plant-herbivore interactions, Wolbachia
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-98615DOI: 10.1111/j.1365-294X.2006.03030.xISI: 000241157400005OAI: oai:DiVA.org:uu-98615DiVA: diva2:200830
Available from: 2009-04-30 Created: 2009-02-28 Last updated: 2015-04-13

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