Diversity of some gene frequencies in European and Asian populations. VI. Geographic patterns of PGM and ACP |
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Authors: | A Farabegoli G Barbujani |
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Affiliation: | Istituto di Zoologia, Università di Ferrara, Italy. |
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Abstract: | Genetic variation at the phosphoglucomutase-1 (PGM) and acid phosphatase (ACP) loci, in 160 and 120 European and Asian populations, respectively, is described by spatial autocorrelation statistics and directional variograms. Short-distance patterns of gene frequencies correspond to those predicted by models of isolation by distance, but long-range differentiation of populations is observed as well. A possible role of climatic selection in maintaining the PGM polymorphism is supported by the north-south orientation of the gradient for that locus, but not by biochemical evidence. By and large, the observed patterns of gene frequencies seem to reflect a combination of demographic processes, subdivision and isolation of local populations among them. |
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