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Descripción
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| In the present work, a spatial analysis of genetic diversity has been carried out in ten Wych elm populations (Ulmus glabra Hudson) located along the Central System. For that purpose, 11 nuclear loci of the microsatellite type were analyzed. In a first approximation, a Mantel test was used to calculate the correlation between the genetic distances matrix and the geographic distances for each of the populations. On the other hand, a spatial autocorrelation analysis was performed, and the corresponding correlation graphs (correlograms) for each of the populations were obtained. Finally, for those populations in which the existence of spatial genetic structure (SGS) was detected, a small scale spatial autocorrelation analysis was carried out. The Mantel test detected the existence of a significant correlation (P<0.05) between the genetic distances matrix and geographical distances in five of the ten populations studied (Riaza-Becerril, Rozas de Puerto Real, El Tiemblo, El Barraco -Valle de Iruelas- And Casillas). The analysis of spatial autocorrelation allowed to detect the existence of a positive and significant autocorrelation (P<0.01) for the first distance classes in six of the populations analyzed (Riaza-Becerril, Rozas de Puerto Real, El Tiemblo, El Barraco, Casavieja and Benfeita). The extension of this positive autocorrelation was estimated by the point of intercept of the graph of the autocorrelation coefficient with the axis of the value 0 for this coefficient, varying this distance between the 42.6m in Rozas de Puerto Real and the 237.9m in El Barraco. In the populations of Rozas de Puerto Real and El Tiemblo the existence of a negative and highly significant autocorrelation was also detected at greater distances. Analysing the spatial autocorrelation at a finer scale, those individuals who contributed significantly to the existence of positive SGS were detected. The number of these individuals varied between 2 (out of the 20 individuals in Casavieja) and 42 (out of the 46 individuals in Rozas de Puerto Real). This study has revealed important data on how the environment of the population, the disposition of individuals within each population or even the existence of U. minor introgression can affect the SGS. These results allow a better understanding of the SGS of relict populations of U. glabra from the Central System, and thus, to develop appropriate management plans for each of these populations. | |
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Internacional
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No |
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Nombre congreso
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VIII Congreso de Biología de la Conservación de Plantas |
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Tipo de participación
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960 |
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Lugar del congreso
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Madrid |
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Revisores
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Si |
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ISBN o ISSN
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DOI
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Fecha inicio congreso
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04/07/2017 |
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Fecha fin congreso
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07/07/2017 |
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