Multispecies interactions affect cytoplasmic incompatibility in Tribolium flour beetles
Article Abstract:
A third agent that mediates cytoplasmic incompatibility in the flour beetle (Tribolium confusum) was discovered. Previous studies have shown that crosses between males infected with a maternally inherited rickettsia-like bacteria and uninfected females were sterile, whereas all other crosses were fertile. Offspring from infected beetles which were raised on grain molded with Streptomyces aureofaciens exhibited high curing rates, while those raised on S. griseus and two penicillium species showed low curing rates. The results indicate the existence of a biotic curing agent that produces partially reproductively isolated beetle populations.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1992
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Mycophagous 'Drosophila' and their nematode parasites
Article Abstract:
The interactions between mushroom-breeding Drosophila species and their nematode parasite Howardula aoronymphium were studied to see how parasite infestation affects the population dynamics of the host organism. The results showed that the prevalence of infection can be very high and that H. aoronymphium reduces the fertility of female flies by 50% to 100%, depending on the species. These interactions can have significant effects on host-parasite population dynamics and may have important consequences for the evolution of both parasite and host species.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1992
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Incompatibility analysis of male hybrid sterility in two Drosophila species: lack of evidence for maternal, cytoplasmic, or transposable element effects
Article Abstract:
A study of two Drosophila species is presented that seeks to determine maternal effects on male hybrid sterility. Hybrid sterility is caused by interspecific combinations of nonallelic genes that are unable to undergo synergistic interactions. Focusing on genome parts, it was observed that symbionts and transposable elements cause strong unidirectional hybrid breakdown thus making them highly unlikely to cause sterility. The same conclusion can be arrived at for other cytoplasic, or egg-transmitted factors.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1995
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