INMIBO ( EX - PROPLAME)   14614
INSTITUTO DE MICOLOGIA Y BOTANICA
Unidad Ejecutora - UE
artículos
Título:
Biogeography and Divergence Times of Genus Macroptilium (Leguminosae)
Autor/es:
ESPERT, S. M. Y BURGHARDT, A.D.
Revista:
AoB Plants
Editorial:
Oxford University Press
Referencias:
Año: 2010 vol. 2010 p. 1 - 7
ISSN:
2041-2851
Resumen:
Background
and aims
Macroptilium is a herbaceous legume genus with 18 currently accepted species, seven of
them with economic importance due to their use as forage, green fertilizer and in medicine.
The genus is strictly American, with an unknown biogeographic history. The aim of this study
was to infer a biogeographic pattern of Macroptilium and to estimate its divergence times,
using sequences from the nuclear ribosomal DNA internal transcribed spacers.is a herbaceous legume genus with 18 currently accepted species, seven of
them with economic importance due to their use as forage, green fertilizer and in medicine.
The genus is strictly American, with an unknown biogeographic history. The aim of this study
was to infer a biogeographic pattern of Macroptilium and to estimate its divergence times,
using sequences from the nuclear ribosomal DNA internal transcribed spacers.Macroptilium and to estimate its divergence times,
using sequences from the nuclear ribosomal DNA internal transcribed spacers.
Methodology To study the historical biogeography of Macroptilium, two approaches were used: area optimization
on a previously obtained phylogeny and a dispersalvicariance analysis. Divergence
times were calculated by Bayesian methods.To study the historical biogeography of Macroptilium, two approaches were used: area optimization
on a previously obtained phylogeny and a dispersalvicariance analysis. Divergence
times were calculated by Bayesian methods.
Principal results The analyses revealed that Macroptilium has its origin in the middle Pliocene, with an estimated
age that ranges from 2.9 to 4 million years. The biogeographic analyses placed its
origin in South America, specifically on the Chaquean sub-region, where most of the cladogenetic
events of the genus took place.The analyses revealed that Macroptilium has its origin in the middle Pliocene, with an estimated
age that ranges from 2.9 to 4 million years. The biogeographic analyses placed its
origin in South America, specifically on the Chaquean sub-region, where most of the cladogenetic
events of the genus took place.
Conclusions Macroptilium constitutes a further example of the geographic pattern displayed by numerous
Neotropical taxa that moved north from South America to dominate the Central American
lowlands after the land connection across the Isthmus of Panama was established.Macroptilium constitutes a further example of the geographic pattern displayed by numerous
Neotropical taxa that moved north from South America to dominate the Central American
lowlands after the land connection across the Isthmus of Panama was established.