Abstract
A new system of hybrid dysgenesis in Drosophila virilis is described. Dysgenic crosses in this species result in mobilization of several families of mobile elements (ME): Ulysses, Penelope, Helena, and Paris, causing hybrid sterility, mutations, and other disorders. The distribution of ME in different geographic populations of D. virilis and other species of the virilis group was studied. It was found that, contrary to other ME, the Penelope capable of inducing the hybrid dysgenesis syndrome is not present in all populations of D. virilis. Basing on these data and on the results of chromosomal localization of Penelope and other ME, we conclude that the D. virilis genome is now being invaded by Penelope. The sites of chromosomal localization of ME coincide often with the inversion breakpoints described for the virilis group species. Hence, dysgenesis may play the key role in mobilization of ME and in induction of chromosomal rearrangements at the early phase of speciation process.
| Original language | English |
|---|---|
| Pages (from-to) | 161-168 |
| Number of pages | 8 |
| Journal | Molecular Biology |
| Volume | 32 |
| Issue number | 1 |
| State | Published - Jan 1998 |
| Externally published | Yes |
Keywords
- Blot analysis
- Drosophila
- Hybrid dysgenesis
- Inversion
- Mobile elements
- Speciation
ASJC Scopus subject areas
- Biophysics
- Structural Biology