Inbreeding depression in development,survival, and reproduction in the adzuki bean beetle (<Emphasis Type="Italic">Callosobruchus chinensis</Emphasis>) |
| |
Authors: | Tomohiro Harano |
| |
Institution: | (1) Laboratory of Ecological Science, Department of Biology, Faculty of Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan |
| |
Abstract: | Inbreeding depression of an aspect of fitness is observed in many insects, but the traits that are of importance for inbreeding
depression of fitness remain poorly understood. Here the magnitude of inbreeding depression of fitness-related traits in the
development and adult stages was measured in a captive population of the adzuki bean beetle, Callosobruchus chinensis (Coleoptera: Bruchidae). Beetles produced by full-sib matings had 8% lower survival in the development stage than did beetles
produced by unrelated matings. Although inbred and outbred offspring did not differ in body size after emergence, inbred offspring
took 2–3% longer to develop to emergence. This indicates inbreeding depression of growth rate. At the adult stage, inbreeding
had no significant effect on longevity, however lifetime offspring production was reduced by 11%. Thus, the magnitude of inbreeding
depression was relatively large for offspring production. This suggests inbreeding depression of fitness manifests, to a particularly
significant extent, in reduced productivity. This study shows the C. chinensis population, which has been in captivity for more than 100 generations, harbors genetic loads. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|