Abstract
The geographical variation of 25 native populations of maritime pine (Pinus pinaster Ait.) was studied using ten allozymes encoded by 16 loci. A phylogenetic tree based on Nei’s unbiased genetic distance and a Mantel’s randomization test were made. Geostatistical analysis was used for describing in more detail spatial patterns of gene frequencies. The phylogenetic analysis found a clear clustering in northwestern populations and a complex pattern, with two differentiated groups, in the southeastern and eastern regions. Clinal trends of variation and fine-scale spatial structure were detected by geostatistical analysis. Directional clinal variation was found from south to north and, though to a lesser extend, from east to west. This pattern was stronger when populations were separated by more than 250 km. The long-distance founder events during postglacial spread and the orientation of the main mountain ranges are proposed to be the main causes of the geographical structure of this species.
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González-Martínez, S.C., Salvador, L., Agúndez, D., Alía, R., Gil, L. (2001). Geographical variation of gene diversity of Pinus pinaster Ait. in the Iberian Peninsula. In: Müller-Starck, G., Schubert, R. (eds) Genetic Response of Forest Systems to Changing Environmental Conditions. Forestry Sciences, vol 70. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9839-2_14
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DOI: https://doi.org/10.1007/978-94-015-9839-2_14
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