Abstract
| Lingua originale | English |
|---|---|
| pagine (da-a) | 596-601 |
| Numero di pagine | 6 |
| Rivista | Molecular Phylogenetics and Evolution |
| Volume | 53 |
| Stato di pubblicazione | Published - 2009 |
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All Science Journal Classification (ASJC) codes
- Ecology, Evolution, Behavior and Systematics
- Molecular Biology
- Genetics
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A study on Pomatoschistus tortonesei Miller 1968 (Perciformes, Gobiidae) reveals the Siculo-Tunisian Strait (STS) as a breakpoint to gene flow in the Mediterranean basin. / Lo Brutto, Sabrina; Arculeo, Marco; Mejri, Randa; Hassine, Oum Kalthoum Ben.
In: Molecular Phylogenetics and Evolution, Vol. 53, 2009, pag. 596-601.Risultato della ricerca: Article
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TY - JOUR
T1 - A study on Pomatoschistus tortonesei Miller 1968 (Perciformes, Gobiidae) reveals the Siculo-Tunisian Strait (STS) as a breakpoint to gene flow in the Mediterranean basin.
AU - Lo Brutto, Sabrina
AU - Arculeo, Marco
AU - Mejri, Randa
AU - Hassine, Oum Kalthoum Ben
PY - 2009
Y1 - 2009
N2 - The current genetic structure of P. tortonesei, exclusively inhabiting lagoons, may reflect a Plio-Pleistocene colonisation of an ancestor line which has undergone phases of population decline and expansion, following alternate cooling phases. Regarding the calculation of divergence time, it has been estimated that P.tortonesei seems to be the most recent species within the Pomatoschistus genus. It appears also that the discrepancy of P. tortonesei into two distinct phyletic lineages occurred 0.1 Mya.Recurring shifts in sea level and sea surface temperatures of Mediterranean Sea caused the desiccation of shallower lagoonsand the consequent bottleneck phenomena of the brackish populations.Genetic differentiation in P. tortonesei seems to have been affected by its historical demography. Colonization and re-colonizationprocesses could have had strong effects on mitochondrial genealogy lineages.The SPN showed two haplogroups for each gene, each consistent with the two main clades, W-MED and E-MED, and resulting in a star-like shape network in agreement with the expansionmodel. These results correlated with those obtained through neutrality statistic tests, where significantly negative values forTajima’s D and Fu’s F statistics were most likely the result of recent population growth, since the mismatch distribution of both genesfitted the predicted distribution under a model of sudden population expansion.
AB - The current genetic structure of P. tortonesei, exclusively inhabiting lagoons, may reflect a Plio-Pleistocene colonisation of an ancestor line which has undergone phases of population decline and expansion, following alternate cooling phases. Regarding the calculation of divergence time, it has been estimated that P.tortonesei seems to be the most recent species within the Pomatoschistus genus. It appears also that the discrepancy of P. tortonesei into two distinct phyletic lineages occurred 0.1 Mya.Recurring shifts in sea level and sea surface temperatures of Mediterranean Sea caused the desiccation of shallower lagoonsand the consequent bottleneck phenomena of the brackish populations.Genetic differentiation in P. tortonesei seems to have been affected by its historical demography. Colonization and re-colonizationprocesses could have had strong effects on mitochondrial genealogy lineages.The SPN showed two haplogroups for each gene, each consistent with the two main clades, W-MED and E-MED, and resulting in a star-like shape network in agreement with the expansionmodel. These results correlated with those obtained through neutrality statistic tests, where significantly negative values forTajima’s D and Fu’s F statistics were most likely the result of recent population growth, since the mismatch distribution of both genesfitted the predicted distribution under a model of sudden population expansion.
KW - Pomatoschistus tortonesei
KW - Siculo-Tunisian Strait (STS)
KW - mtDNA
UR - http://hdl.handle.net/10447/51417
M3 - Article
VL - 53
SP - 596
EP - 601
JO - Molecular Phylogenetics and Evolution
JF - Molecular Phylogenetics and Evolution
SN - 1055-7903
ER -