Distribution and evolution of mobile elements in the virilis species group of Drosophila

The distributions of Penelope and Ulysses, two transposable elements that can induce hybrid dysgenesis, were studied in several species groups of Drosophila. No significant hybridization to Penelope and Ulysses probes was detected by Southern blot analyses of species outside the virilis group. In co...

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Bibliographic Details
Published in:Chromosoma 1999-12, Vol.108 (7), p.443-456
Main Authors: Zelentsova, H, Poluectova, H, Mnjoian, L, Lyozin, G, Veleikodvorskaja, V, Zhivotovsky, L, Kidwell, M.G, Evgen'ev, M.B
Format: Article
Language:English
Subjects:
Animals
Chromosome Inversion
chromosome mapping
DNA Transposable Elements
Drosophila kanekoi
Drosophila lummei
Drosophila virilis
Drosophilidae - genetics
Evolution, Molecular
Female
Genetic Variation
Heterochromatin - genetics
in situ hybridization
Insects
Male
nucleic acid hybridization
Penelope element
polytene chromosomes
Southern blotting
Species Specificity
transposons
Ulysses element
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Summary:The distributions of Penelope and Ulysses, two transposable elements that can induce hybrid dysgenesis, were studied in several species groups of Drosophila. No significant hybridization to Penelope and Ulysses probes was detected by Southern blot analyses of species outside the virilis group. In contrast, both element families have had a long residence in all species of the virilis species group, as indicated by their strong presence in the heterochromatic chromocenter. Except for D. kanekoi, D. lummei, and some strains of D. virilis, species of the group carry full-sized, and at least potentially functional, copies of both element families. Consistent with the occurrence of recent transposition, Penelope and Ulysses elements are located at different chromosomal sites in different geographical strains of the same species. A total of 79 Penelope and 47 Ulysses euchromatic insertion sites were localized to chromosomal subsections in species of the virilis group. Highly significant deviations from independence of the distributions of Penelope and Ulysses and previously established inversion breakpoints were documented, suggesting that these transposable elements may have played an important role in genomic reorganization and evolution of the virilis species group, which is especially rich in karyotypic variation.
ISSN:0009-5915
1432-0886
DOI:10.1007/s004120050396