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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Messina, Frank J. Durham, Susan L. |
| Spatial Coverage | India Burkina Faso |
| Description | Country affiliation: United States Author Affiliation: Messina FJ ( Department of Biology, Utah State University, Logan, UT 84322-5305, USA. frank.messina@usu.edu) |
| Abstract | Geographic populations of a widespread species can differ in their ability to adapt to a novel environment because they possess different amounts of the requisite genetic variation. We compared responses to the same novel host in ecologically and genetically divergent populations of the seed beetle Callosobruchus maculatus (F.). Populations from Africa and Asia had been derived from and maintained on different legume hosts. In preselection assays, both populations exhibited lower survival, slower development, and smaller size on a third host (adzuki bean), and the difference in performance between the ancestral and novel hosts was especially high for the African population. Replicate lines of each population were switched to adzuki bean or maintained on the ancestral host, and beetle performance was measured on both hosts after 12 generations. Survival on adzuki bean increased substantially in the adzuki-bean lines of the African population, but improved only slightly in the Asian lines. Similarly, only the African adzuki-bean lines exhibited significantly faster development on adzuki bean. Improved performance on adzuki bean did not simultaneously reduce performance on the ancestral host. Together with previous studies, these results confirm that populations of C. maculatus often possess sufficient standing genetic variation for rapid adaptation to a novel host, but the magnitude of the response may depend on the source population. Although international trade in grain legumes can expand beetle host ranges and produce unusual biotypes, the consistent absence of strong genetic trade-offs in larval performance or adult oviposition across hosts makes it unlikely that this insect would form distinct host races. |
| File Format | HTM / HTML |
| ISSN | 0046225X |
| e-ISSN | 19382936 |
| Journal | Environmental Entomology |
| Issue Number | 4 |
| Volume Number | 42 |
| Language | English |
| Publisher | Oxford University Press |
| Publisher Date | 2013-08-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Discipline Zoology Beetles Physiology Fabaceae Herbivory Adaptation, Biological Animals Genetics Growth & Development Burkina Faso Diet Genetic Variation Geography Larva Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Ecology, Evolution, Behavior and Systematics Insect Science |
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