Gene flow between species of Lake Victoria haplochromine fishes
The haplochromine cichlid fishes of Lake Victoria (LV), East Africa, are a textbook example of adaptive radiation - a rapid divergence of multiple morphologically distinguishable forms from a few founding lineages. The forms are generally believed to constitute a "flock" of several hundred...
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oai:animorepository.dlsu.edu.ph:faculty_research-23832021-06-25T01:12:54Z Gene flow between species of Lake Victoria haplochromine fishes Samonte, Irene E. Satta, Yoko Sato, Akie Tichy, Herbert Takahata, Naoyuki Klein, Jan The haplochromine cichlid fishes of Lake Victoria (LV), East Africa, are a textbook example of adaptive radiation - a rapid divergence of multiple morphologically distinguishable forms from a few founding lineages. The forms are generally believed to constitute a "flock" of several hundred reproductively isolated species in a dozen or so genera. This belief has, until now, not been subjected to a test, however. Here, we compare genetic variation at 11 loci in 10 haplochromine populations of 6 different species. Although the genetic diversity in the populations is quite high, using a variety of statistical tests, we find no evidence of genetic differentiation among the populations of LV haplochromines. On genetic distance trees, populations of the same species intermingle with those of different species. At the molecular level, the species are indistinguishable from one another. Genetic comparisons with closely related species in 2 crater lakes indicate that the species within LV continue exchanging genes. These observations have important implications for phylogenetic reconstruction. The approach used in this study is applicable to other instances of adaptive radiation. © The Author 2007. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. All rights reserved. 2007-09-01T07:00:00Z text text/html https://animorepository.dlsu.edu.ph/faculty_research/1384 https://animorepository.dlsu.edu.ph/context/faculty_research/article/2383/type/native/viewcontent Faculty Research Work Animo Repository Gene flow Adaptive radiation (Evolution) Cichlids Haplochromis, Hybridization Biology |
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Gene flow Adaptive radiation (Evolution) Cichlids Haplochromis, Hybridization Biology Samonte, Irene E. Satta, Yoko Sato, Akie Tichy, Herbert Takahata, Naoyuki Klein, Jan Gene flow between species of Lake Victoria haplochromine fishes |
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The haplochromine cichlid fishes of Lake Victoria (LV), East Africa, are a textbook example of adaptive radiation - a rapid divergence of multiple morphologically distinguishable forms from a few founding lineages. The forms are generally believed to constitute a "flock" of several hundred reproductively isolated species in a dozen or so genera. This belief has, until now, not been subjected to a test, however. Here, we compare genetic variation at 11 loci in 10 haplochromine populations of 6 different species. Although the genetic diversity in the populations is quite high, using a variety of statistical tests, we find no evidence of genetic differentiation among the populations of LV haplochromines. On genetic distance trees, populations of the same species intermingle with those of different species. At the molecular level, the species are indistinguishable from one another. Genetic comparisons with closely related species in 2 crater lakes indicate that the species within LV continue exchanging genes. These observations have important implications for phylogenetic reconstruction. The approach used in this study is applicable to other instances of adaptive radiation. © The Author 2007. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. All rights reserved. |
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Samonte, Irene E. Satta, Yoko Sato, Akie Tichy, Herbert Takahata, Naoyuki Klein, Jan |
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Samonte, Irene E. Satta, Yoko Sato, Akie Tichy, Herbert Takahata, Naoyuki Klein, Jan |
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Samonte, Irene E. |
title |
Gene flow between species of Lake Victoria haplochromine fishes |
title_short |
Gene flow between species of Lake Victoria haplochromine fishes |
title_full |
Gene flow between species of Lake Victoria haplochromine fishes |
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Gene flow between species of Lake Victoria haplochromine fishes |
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Gene flow between species of Lake Victoria haplochromine fishes |
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gene flow between species of lake victoria haplochromine fishes |
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Animo Repository |
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2007 |
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https://animorepository.dlsu.edu.ph/faculty_research/1384 https://animorepository.dlsu.edu.ph/context/faculty_research/article/2383/type/native/viewcontent |
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