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Molecular organization of the X chromosome in different species of the obscura group of Drosophila

Article Abstract:

Nine single copy genes presumably located in a single chromosome were mapped by in situ hybridization in six species of the obscura group of Drosophila. The six species represented three Nearctic species and three Palearctic species, while eight of the genes represented X-linked traits. The results showed that probes for all genes hybridized to a single site. However, two probes for Mullers element A hybridized to the proximal end of the XR chromosomal arm of Nearctic species, suggesting a pericentric inversion event which occured during the divergence of the Palearctic and Nearctic species of the obscura group.

Author: Aguade, Montserrat, Segarra, Carmen
Publisher: Genetics Society of America
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1992
Analysis, Usage, Identification and classification, Genetic markers, X chromosome

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Polymorphism and divergence in the Mst26A male accesssory gland gene region in Drosophila

Article Abstract:

Studies covering DNA sequence polymorphism and divergence in Drosophila male accessory gland proteins are analyzed. Drosophila males transfer protein substances to females in the process of mating. The proteins exhibit influence in female reproduction. Mst26Aa and Mst26Ab transcription units are fixed in 1.6kb segments. Results show that Mst26A polymorphisms and divergence do not follow expected patterns of mutation-drift equilibrium.

Author: Aguade, Montserrat, Langley, Charles H., Naohiko Miyashita
Publisher: Genetics Society of America
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1992
Genetic polymorphisms, Antigen presenting cells

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Molecular characterization of the breakpoints of an inversion fixed between Drosophila melanogaster and D. subobscura

Article Abstract:

Genetic experiments enable the identification and molecular characterization of two inversion breakpoints fixed during the divergence of Drosophila melanogaster and D. subobscura. A comparative study of the sequences of these inversion breakpoints helps determine the location of breakpoints. Both species have a new transcription unit near one of the breakpoints.

Author: Aguade, Montserrat, Segarra, Carmen, Cirera, Susanna, Martin-Campos, Jesus M.
Publisher: Genetics Society of America
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1995

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Subjects list: Genetic aspects, Drosophila, Inversion (Genetics), Research
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