Two male-killing Wolbachia strains coexist within a population of hte butterfly Acraea encedon
Article Abstract:
Two male-killing Wolbachia strains, strains of inherited bacteria, have been found to coexist in an Acraea encedon population. Whether or not multiple male-killers have invaded one host species was studied to see to what extent incidence of male-killers would be restricted by the rate of new host-parasite interactions. In Uganda two species are infected by one strain of Wolbachia. No evidence of variation was seen in the population. In Tanzania, two phylogenetically different Wolbachia strains were found in one population. Whether the polymorphism seen is stable is not known.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2001
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What causes inefficient transmission of male-killing Wolbachia in Drosophila?
Article Abstract:
Inefficient transmission of male-killing Wolbachia in Drosophila bifasciata and its causes have been studied. No evidence for either fixed or polymorphic host genes that repress transmission at standard environmental temperatures was seen. Severe temperature treatment does affect vertical transmission adversely. The case of Wolbachia in D. bifasciata is a naturally balanced situation, the population being kept polymorphic without evolution of host resistance genes.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2001
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Sex ratio distortion in Acreaea encedon (Lepidoptera: Nymphalidae) is caused by a male-killing bacterium
Article Abstract:
Sex ratio in Acraea encedon butterflies is maternally inherited and the females produce either only females or males and females in a ratio very close to 1:1. All-female lines are associated with low egg-hatching rates. The trait can be cured through treatment with antibiotics and thus seems not to be caused by a meiotically driven sex chromosome. It is likely associated with a bacterium inherited from the mother that kills the males.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 1998
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