Male-killing bacterium in a fifth ladybird beetle, Coleomegilla maculata (Coleoptera:Coccinellidae)

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 > Institute of Infection Immunity and Inflammation
Journal Name:Heredity
Publisher:Nature Publishing Group
ISSN:0018-067X
ISSN (Online):1365-2540

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