A genetic basis for the inviability of hybrids between sibling species of Drosophila

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Genetics; (USA)

OSTI ID:6524339

Hutter, P ^[1]; Roote, J; Ashburner, M ^[2]

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1. Universite de Geneve, Geneva (Switzerland)
2. Univ. of Cambridge (England)

An X-ray induced mutation of Drosophila melanogaster whose only known effect is the rescue of otherwise lethal interspecific hybrids has been characterized. This mutation, Hmr, maps to 1-31.84 (9D1-9E4). Hmr may be the consequence of a P element insertion. It rescues hybrid males from the cross of D. melanogaster females to males of its three sibling species, D. simulans, D. mauritiana and D. sechellia. This rescue is recessive, since hybrid males that carry both Hmr and a duplication expected to be Hmr{sup +} are not rescued. Hmr also rescues the otherwise inviable female hybrids from the cross of compound-X D. melanogaster females to males of its sibling species. This rescue is also recessive, since a compound-X heterozygous for Hmr does not rescue. Another mutation, discovered on the In(1)AB chromosome of D. melanogaster, is also found to rescue normally inviable species hybrids: unlike Hmr, however, In(1)AB rescues hybrid females from the cross of In(1)AB/Y males to sibling females, as well as hybrid males from the cross of In(1)AB females to sibling males. These data are interpreted on the basis of a model for the genetic basis of hybrid inviability of complementary genes.

• OSTI ID: 6524339
• Journal Information: Genetics; (USA), Journal Name: Genetics; (USA) Vol. 124:4; ISSN 0016-6731; ISSN GENTA
• Country of Publication: United States
• Language: English

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