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DIGITAL.CSIC
Article . 2009 . Peer-reviewed
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Genetic variability in Muscari comosum (Liliaceae). III. Enzyme polymorphism in European and Canarian populations

Authors: Ruiz Rejón, C.; Lozano, R.; Ruiz Rejón, M.;

Genetic variability in Muscari comosum (Liliaceae). III. Enzyme polymorphism in European and Canarian populations

Abstract

[ES] Se analiza la variabilidad electroforética en seis loci enzimáticos de 33 poblaciones naturales de M. Comosum. Excepto el sistema GDH todos los demás loci (GOT-1, GOT-2, GOT-3, IDH y ADH) eran polimórficos. Aunque aparentemente las poblaciones están diferenciadas tal como muestran los valores de X2 de heterogeneidad esta diferenciación es solamente moderada de acuerdo con los valores de identidad genética y el estadístico Fst calculados. Las explicaciones más pausibles de este resultado pueden estar relacionadas con características biológicas (reproducción sexual, alogamia predominante, polinización por insectos, amplio rango de distribución geográfica) junto con otros factores adicionales relacionados con el pasado histórico de la especie, tales como su plasticidad fenotípica y su alta longevidad. Además el análisis realizado con estadísticos F muestra que en cuatro de los loci analizados existe un déficit de individuos heterocigotos, que se puede explicar por autopolinización parcial, efecto Whalund o apareamientos consanguíneos. También este análisis muestra que en el locus ADH existe un claro exceso de individuos heterocigotos. Varias causas pueden producir exceso de heterocigotos (apareamientos negativos, diferencias en las frecuencias alélicas entre los acervos gaméticos de machos y de hembras). Pero nosotros pensamos que esta observación podría explicarse por acción de la selección.

[EN] Electrophoretic variation at six loci from 33 European and Canarian populations of Muscari comosum (Liliaceae) were studied. Only GDH was monomorphic, being polymorphic the remaining loci (GOT-1, GOT-2, GOT-3, IDH and ADH). Although apparently the populations are differentiated, such as showed the values of chi-square of heterogeneity, the values of genetic identity and the Fst indicate that this heterogeneity is only moderated. The most likely explanations of this result could be related to the biological characteristics (sexual reproduction, predominantly outcrossing with mechanism of pollination by insects, widespread geographic range)joint with other factors additionally related to life history of the species, such as the plastic response to the environment, and the high longevity. Furthermore the analysis with F-statistics shows that there is a deficit of heterozygotes for four loci (GOT-1, GOT-2, GOT-3- and IDH) and this explained by partial self-pollination, Wahlund effect or consanguineous mating, among other factors. However this analysis shows a clear excess of heterozygotes at the ADH locus. Although many reasons could cause an excess heterozygotes (negative assortive mating, differences in allele frequencies between male and female gamete pools) we think that this obervation can be explained by selection.

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Country
Spain
Related Organizations
Keywords

Muscari comosum, Plant population, Enzyme polymorphism, Adaptive factors

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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