A particular P-element insertion is correlated to the P-induced hybrid dysgenesis repression in Drosophila melanogaster.
Transposable P elements in Drosophila melanogaster cause hybrid dysgenesis if their mobility is not repressed. The ability to regulate the dysgenic activity of the P elements depends on several mechanisms, one of which hypothesized that a particular deleted P element (the KP element) results in a non-susceptibility which is biparentally transmitted. In this study totally non-susceptible lines, and susceptible lines containing exclusively KP elements (IINS2 line and IIS2 line) were isolated from a M' strain. We show that non-susceptibility is correlated with a particular insertion of one KP element located at the cytological site 47D1. The repression ability of the GD sterility is determined by a recessive chromosomal factor, and cannot be due to the KP-element number. Here the repression of the P mobility is associated with reduction of the P transcripts and the inhibition of P promoter activity.
Higuet
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Mécanimes moléculaires de la spéciation, Université Pierre & Marie Cure, Paris, France.
Anxolabéhère
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Nouaud
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D000818:Animals; D004251:DNA Transposable Elements; D004331:Drosophila melanogaster / Q000235:genetics*; D005260:Female; D017353:Gene Deletion; D020022:Genetic Predisposition to Disease; D006059:Gonadal Dysgenesis / Q000235:genetics; D006824:Hybridization, Genetic / Q000235:genetics; D008297:Male; D016254:Mutagenesis, Insertional
D004251:DNA Transposable Elements