role of historical factors and natural selection in the evolution of breeding systems of Oxalis alpina in the Sonoran desert 'Sky Islands'

Pleistocene climatic oscillations are known to influence the patterns of genetic diversity and the distribution of traits that are the target of selection. Here, we combine phylogeographical and ecological niche modelling (ENM) approaches to explore the influence of historical factors (Pleistocene c...

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Bibliographic Details
Published in:Journal of evolutionary biology 2010-10, Vol.23 (10), p.2163-2175
Main Authors: PÉREZ-ALQUICIRA, J, MOLINA-FREANER, F.E, PIÑERO, D, WELLER, S.G, MARTÍNEZ-MEYER, E, ROZAS, J, DOMÍNGUEZ, C.A
Format: Article
Language:English
Subjects:
Arizona
Biological Evolution
Climate
Desert Climate
Deserts
distyly
ecological niche modelling
Ecosystem
Evolutionary biology
Flowers - physiology
Genetic diversity
Genetic Drift
genetic structure
Genetic Variation
Haplotypes
historical factors
Islands
Magnoliopsida - genetics
Mexico
Models, Genetic
natural selection
New Mexico
Phylogeography
Pleistocene
Selection, Genetic
Sky Islands
tristyly
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Summary:Pleistocene climatic oscillations are known to influence the patterns of genetic diversity and the distribution of traits that are the target of selection. Here, we combine phylogeographical and ecological niche modelling (ENM) approaches to explore the influence of historical factors (Pleistocene climatic shifts) and natural selection on the evolution of distyly (two floral morphs) from tristyly (three floral morphs) of Oxalis alpina in the Sky Islands of the Sonoran Desert. Molecular data and ENM indicate that historical factors have had a strong influence on the genetic structure and the geographical distribution of reproductive systems of O. alpina. Moreover, genetic results suggest the possibility that distylous populations do not represent a monophyletic group. We propose that the combined effects of natural selection and genetic drift have influenced the tristyly-distyly transition.
ISSN:1010-061X
1420-9101
DOI:10.1111/j.1420-9101.2010.02075.x