Hurst, G.D., Hammarton, T.C. , Obrycki, J.J., Majerus, T.M., Walker, L.E., Bertrand, D. and Majerus, M.E. (1996) Male-killing bacterium in a fifth ladybird beetle, Coleomegilla maculata (Coleoptera:Coccinellidae). Heredity, 77, pp. 177-185. (doi: 10.1038/hdy.1996.122)
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Abstract
Inherited symbionts which selectively cause the death of male hosts are found widely across the Insecta. Previous studies have shown a single, but different micro-organism to be responsible for male-killing in each taxonomic group studied. We here produce evidence that within a group of insects, the Coccinellidae, there is more than one causal agent of male lethality. We report a novel observation of a male-killing trait in the species Coleomegilla maculata. Six of 26 crosses were found to produce a female-biased sex ratio associated with a low egg hatch-rate. The trait was matrilinearly inherited and was observed to be tetracycline-sensitive. However, tests which indicate the presence of a Rickettsia, previously found to cause male-killing in another member of the Coccinellidae, Adalia bipunctata, proved negative. We therefore conclude that the phenomenon of male-killing is multicausal, within, as well as between, taxonomic groups of the Insecta.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hammarton, Dr Tansy |
| Authors: | Hurst, G.D., Hammarton, T.C., Obrycki, J.J., Majerus, T.M., Walker, L.E., Bertrand, D., and Majerus, M.E. |
| Subjects: | Q Science > QH Natural history > QH301 Biology Q Science > QR Microbiology |
| College/School: | College of Medical Veterinary and Life Sciences > School of Infection & Immunity |
| Journal Name: | Heredity |
| Publisher: | Nature Publishing Group |
| ISSN: | 0018-067X |
| ISSN (Online): | 1365-2540 |
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