The Speciation triangle
Gene-Tree, Species-Tree Roconciliation:
An eidolonic species is a transitional lineage in the process of speciation, marked by incomplete reproductive isolation and meiotic compatibility, often observable as hybrid zones or morphologically distinct populations with genetic introgression. 20% of metazoans and plants are thought to be eidolonic species.
The speciation triangle diagram is a means to split precisely between two new species according to the biological species concept. The hard, molecular criterium is the compatible functionality of the meiotic process between two sexual individual's gametes. The F1 offspring is fertile within the new species. This is a hard definition of species. Species complexes are characterized by complex-molecular features and are idiosyncratic to a speciation triangle. Species complexes, superspecies, and ring species are not seperated - introgression still happens. Therefore, they are still a single biological (bisexual) species, and populations are not separated finally. The molecular drive mechanisms within the triangle are significant for the outcome of the speciation process. "Molecular Drive" is the third evolutionary force next to "Random Drift " and "Darwinian Natural Selection".
The diagram is complementary and linked to the deep gene definition published here on Flickr: www.flickr.com/photos/143115576@N02/albums/72157670679325...
References:
1. Dover, G. 2000. Dear Mr Darwin - Letters on the Evolution of Life and Human Nature. PHOENIX, London.
2. Hennig, W. 1982. Phylogenetische Systematik. Parey, Berlin Hamburg.
3. Eldredge, N., and S. J. Gould. 1972. Punctuated Equilibria: An Alternative to Phyletic Gradualism, p. 82-115. In T. J. M. Schopf (ed.), Models in Paleaobiology. Freeman Cooper, San Francisco.
4. Gould, S. J. 2002. The structure of evolutionary theory. Belknap Press of Harvard University Press, Cambridge, Mass.
5. Gould, S. J., and N. Eldredge. 1993. Punctuated equilibrium comes of age. Nature 366:223-7.
6. 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.
7. Dawkins, R. 1989. The Selfish Gene. Oxford University Press, Oxford.
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.
3. Nelson, P., and J. Masel. 2018. Evolutionary capacitance emerges spontaneously during adaptation to environmental changes. Cell Reports 25:249-258.
The Speciation triangle
Gene-Tree, Species-Tree Roconciliation:
An eidolonic species is a transitional lineage in the process of speciation, marked by incomplete reproductive isolation and meiotic compatibility, often observable as hybrid zones or morphologically distinct populations with genetic introgression. 20% of metazoans and plants are thought to be eidolonic species.
The speciation triangle diagram is a means to split precisely between two new species according to the biological species concept. The hard, molecular criterium is the compatible functionality of the meiotic process between two sexual individual's gametes. The F1 offspring is fertile within the new species. This is a hard definition of species. Species complexes are characterized by complex-molecular features and are idiosyncratic to a speciation triangle. Species complexes, superspecies, and ring species are not seperated - introgression still happens. Therefore, they are still a single biological (bisexual) species, and populations are not separated finally. The molecular drive mechanisms within the triangle are significant for the outcome of the speciation process. "Molecular Drive" is the third evolutionary force next to "Random Drift " and "Darwinian Natural Selection".
The diagram is complementary and linked to the deep gene definition published here on Flickr: www.flickr.com/photos/143115576@N02/albums/72157670679325...
References:
1. Dover, G. 2000. Dear Mr Darwin - Letters on the Evolution of Life and Human Nature. PHOENIX, London.
2. Hennig, W. 1982. Phylogenetische Systematik. Parey, Berlin Hamburg.
3. Eldredge, N., and S. J. Gould. 1972. Punctuated Equilibria: An Alternative to Phyletic Gradualism, p. 82-115. In T. J. M. Schopf (ed.), Models in Paleaobiology. Freeman Cooper, San Francisco.
4. Gould, S. J. 2002. The structure of evolutionary theory. Belknap Press of Harvard University Press, Cambridge, Mass.
5. Gould, S. J., and N. Eldredge. 1993. Punctuated equilibrium comes of age. Nature 366:223-7.
6. 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.
7. Dawkins, R. 1989. The Selfish Gene. Oxford University Press, Oxford.
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.
3. Nelson, P., and J. Masel. 2018. Evolutionary capacitance emerges spontaneously during adaptation to environmental changes. Cell Reports 25:249-258.