Location of Shfr, a new gene that rescues hybrid female viability in crosses between Drosophila simulans females and D. melanogaster males

Article Abstract:

A new gene that rescues hybrid female viability in crosses between Drosophila simulans females and D. melanogaster males has been studied. Findings show that 94% of the females of a D. simulans population from Tel Aviv produced hybrid progenies for both sexes. The gene is called Simulans hybrid females rescue (Shfr) and is temperature-sensitive. A much smaller effect is seen as temperature increases.

Israel

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Inheritance of behavioural differences between two interfertile, sympatric species, Drosophila silvestris and D. hetroneura

Article Abstract:

Behavior differences inherited between two interfertile, sympatric species, Drosophila silvestris and D. hetroneura, Hawaiian fly species, are discussed. Mating and aggressive behavior of their reciprocal F(sub.1) hybrids were studied, and it was found that patterns of inheritance of aggressive behavior and lack of an X-chromosomal effect are difficult to reconcile with the hypothesis that the traits are influenced by a coadapted gene complex.

Hawaii, Sexual behavior in animals, Animal sexual behavior, Aggressive behavior in animals, Animal aggression, Courtship of animals, Mating behavior, X chromosome

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Genetics of hybridization between Drosophila simulans females and D. melanogaster males

Article Abstract:

Hybridization genetics between Drosophila simulans females and D. melanogaster males are discussed as studiedusing classical genetic analyses to find the influence of each major chromosome on the breakdown of sexual isolation between the males and females. It appears that independent evolutionary events occur during speciation.

Biogeography

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