Speciation-Diamand

Gene-Tree, Species-Tree Roconciliation:

 

The Speciation-Diamand is an expansion of the Speciation Triangle in which not at least two species arise but seemingly only one remains. The Drosophila M- to P-element evolution is a well studied example. Another classic is the I-R hybrid dysgenesis system of Drosophila. Especially relevant is the hybrid dysgenesis system triggered by the retroelement "Penelope". Other systems have dominated molecular drive and speciation in general:

 

Further reading:

1. Engels, W. R. 1983. The P Family of Transposable Elements in Drosophila. Ann Rev Genet 17:315-344.

2. Engels, W. R. 2007. Hybrid dysgenesis in Drosophila melanogaster: rules of inheritance of female sterility. Genet Res 89:407-24.

3. Dettai, A., and J. N. Volff. 2006. Morphological Characters from the Genome: SINE Insertion Polymorphism and Phylogenies, p. 45-75. In D.-H. Lankenau and J. N. Volff (ed.), Transposable Elements and Genome Dynamics, vol. 4. Springer, Heidelberg.

4. Evgen'ev, M. B., H. Zelentsova, N. Shostak, M. Kozitsina, V. Barskyi, D.-H. Lankenau, and V. G. Corces. 1997. Penelope, a new family of transposable elements and its possible role in hybrid dysgenesis in Drosophila virilis. Proc Natl Acad Sci U S A 94:196-201.

5. Bucheton, A. 1990. I transposable elements and I-R hybrid dysgenesis. TIG 6(1):16.

6. Finnegan, D. J. 1989. The I factor and I-R hybrid dysgenesis in Drosophila melanogaster, p. 503-518. In D. E. Berg and M. M. Howe (ed.), Mobile DNA. American Society for Microbiology, Washington, D.C.

7. Song, S. U., T. Gerasimova, M. Kurkulos, J. D. Boeke, and V. G. Corces. 1994. An Env-like protein encoded by a Drosophila retroelement: evidence that gypsy is an infectious retrovirus. Genes and Developm. 8:2046-2057.

8. Robert, V., N. Prud'homme, A. Kim, A. Bucheton, and A. Pelisson. 2001. Characterization of the flamenco region of the Drosophila melanogaster genome. Genetics 158:701-13.

9. Sarot, E., G. Payen-Groschene, A. Bucheton, and A. Pelisson. 2004. Evidence for a piwi-dependent RNA silencing of the gypsy endogenous retrovirus by the Drosophila melanogaster flamenco gene. Genetics 166:1313-21.

10. Lankenau, S., V. G. Corces, and D. H. Lankenau. 1994. The Drosophila micropia retrotransposon encodes a testis-specific antisense RNA complementary to reverse transcriptase. Mol Cell Biol 14:1764-1775.

 

Chromoanagenesis & Chromothripsis

In cancer research and the development of tumors, related molecular mechanisms that are resposible for molecular drive are Chromothripsis and Chromoanagenesis. In speciation events, the chromosome-dynamics underlying these processes are triggered by or are identical with what Eldrigde and Gould called "punctuated equilibrium". These molecular plus environmental processes potentially fascilitate speciation.

 

For a review on chromothripsis in cancer see:

1. Shorokhova, M., N. Nikolsky, and T. Grinchuk. 2021. Chromothripsis—Explosion in Genetic Science. Cells 10:1102.

 

Other foundation papers see:

2. Lankenau, D.-H. 2006. Germline Double-Strand Break Repair and Gene Targeting in Drosophila: a Trajectory System throughout Evolution, p. 153-197. In D.-H. Lankenau (ed.), Genome Integrity: Facets and Perspectives, vol. 1. Springer, Berlin Heidelberg.

 

 

Done