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No. de sistema: 000059734

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040 _ _ a| ECO
c| ECO
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100 1 _ a| Zarza Franco, Guadalupe Eugenia
c| Doctora
e| autora
245 1 0 a| Diversification in the northern neotropics
b| mitochondrial and nuclear DNA phylogeography of the iguana Ctenosaura pectinataand related species
506 _ _ a| Disponible para usuarios de ECOSUR con su clave de acceso
520 1 _ a| While Quaternary climatic changes are considered by some to have been a major factor promoting speciation within the neotropics, others suggest that much of the neotropical species diversity originated before the Pleistocene. Using mitochondrial and nuclear sequence data, we evaluate the relative importance of Pleistocene and pre-Pleistocene events withinthe evolutionary history of the Mexican iguana Ctenosaura pectinata, and related species. Results support the existence of cryptic lineages with strong mitochondrial divergence(> 4%) among them. Some of these lineages form zones of secondary contact, with one of them hybridizing with C. hemilopha. Evolutionary network analyses reveal the oldest populations of C. pectinata to be those of the northern and southern Mexican coastal regions. Inland and mid-latitudinal coastal populations are younger in age as a consequence of a history of local extinction within these regions followed by re-colonization. Estimated divergence times suggest that C. pectinata originated during the Pliocene, whereas geographically distinct mitochondrial DNA lineages first started to diverge during the Pliocene, with subsequent divergence continuing through the Pleistocene. Our results highlight the influence of both Pliocene and Pleistocene events in shaping the geographical distributionof genetic variation within neotropical lowland organisms. Areas of high genetic diversityin southern Mexico were detected, this finding plus the high levels of genetic diversity within C. pectinata, have implications for the conservation of this threatened species.
533 _ _ a| Reproducción electrónica en formato PDF
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Ctenosaura pectinataand
650 _ 4 a| Iguanas
650 _ 4 a| Cambio climático
650 _ 4 a| Variación genética
650 _ 4 a| Pleistoceno
650 _ 4 a| Filogeografía
651 _ 4 a| México
700 1 _ a| Reynoso, Víctor H.
e| autor
700 1 _ a| Emerson, Brent C.
e| autor
773 0 _
t| Molecular Ecology
g| Vol. 17 (2008), p. 3259–3275
x| 1365-294X
856 4 1 u| http://sii.ecosur.mx/Content/ProductosActividades/archivos/32286/textocompleto.pdf
z| Artículo electrónico
900 _ _ a| Solicítelo con su bibliotecario/a
902 _ _ a| BG / MM
904 _ _ a| Diciembre 2019
905 _ _ a| Artecosur
905 _ _ a| Biblioelectrónica
LNG eng
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*Solicítelo con su bibliotecario/a
Diversification in the northern neotropics: mitochondrial and nuclear DNA phylogeography of the iguana Ctenosaura pectinataand related species
Zarza Franco, Guadalupe Eugenia (autora)
Reynoso, Víctor H. (autor)
Emerson, Brent C. (autor)
Nota: Disponible para usuarios de ECOSUR con su clave de acceso
Contenido en: Molecular Ecology. Vol. 17 (2008), p. 3259–3275. ISSN: 1365-294X
No. de sistema: 59734
Tipo: Artículo
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Inglés

"While Quaternary climatic changes are considered by some to have been a major factor promoting speciation within the neotropics, others suggest that much of the neotropical species diversity originated before the Pleistocene. Using mitochondrial and nuclear sequence data, we evaluate the relative importance of Pleistocene and pre-Pleistocene events withinthe evolutionary history of the Mexican iguana Ctenosaura pectinata, and related species. Results support the existence of cryptic lineages with strong mitochondrial divergence(> 4%) among them. Some of these lineages form zones of secondary contact, with one of them hybridizing with C. hemilopha. Evolutionary network analyses reveal the oldest populations of C. pectinata to be those of the northern and southern Mexican coastal regions. Inland and mid-latitudinal coastal populations are younger in age as a consequence of a history of local extinction within these regions followed by re-colonization. Estimated divergence times suggest that C. pectinata originated during the Pliocene, whereas geographically distinct mitochondrial DNA lineages first started to diverge during the Pliocene, with subsequent divergence continuing through the Pleistocene. Our results highlight the influence of both Pliocene and Pleistocene events in shaping the geographical distributionof genetic variation within neotropical lowland organisms. Areas of high genetic diversityin southern Mexico were detected, this finding plus the high levels of genetic diversity within C. pectinata, have implications for the conservation of this threatened species."


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