Polymorphism in structure of the retrotransposable element 412 in Drosophila simulans and D. melanogaster populations.
The structure of the 412 retrotransposable element was investigated in various natural populations of D. melanogaster and D. simulans by a restriction enzyme analysis. We show that although the canonical structure of the 412 element was the same in both species, a high structural polymorphism existed with various rearranged elements. A 412 family was thus composed of heterogeneous copies of different sizes, with a large proportion of full-size copies. D. simulans had more rearranged copies than D. melanogaster, with some specific copies, such as a 5.6-kb BsrBI fragment, present in all populations of D. simulans. Full-size and rearranged copies were detected in both the euchromatin and the heterochromatin, with many rearranged copies in D. simulans, suggesting a recent mobilization of the 412 element in this species.
Cizeron
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G
Laboratoire de Biométrie, Génétique, Biologie des populations, UMR C.N.R.S. 5558, Université Lyon 1, 69622, Villeurbanne, France.
Biémont
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C
D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics*; D005260:Female; D017353:Gene Deletion; D016678:Genome; D008297:Male; D012150:Polymorphism, Restriction Fragment Length; D015183:Restriction Mapping; D018626:Retroelements / Q000235:genetics*
D018626:Retroelements