Abstract
Gene and gametic frequencies of theAdh, Aox, α-Gpdh andEst-6 loci (map position: II-50.I, III-56.6, II-20.5 and III-36.0 respectively) have been studied in two wine cellar populations at 40 km distance from each other, and two field populations, one near each of the wine cellars. Only one locus,Aox was polymorphic for more than two electromorphs. TheAdh locus seems to follow a different mode of change in genic frequencies in wine cellars, than in the field, while the other loci exhibit a similar pattern of polymorphism in the field and in the wine cellar. Linkage disequilibrium in the gameteAdh/α-Gpdh is affected by different phenomena in the field than in the wine cellar. A stronger linkage disequilibrium in theAdh/gametes observed in the field, may be a consequence of a mixture of subpopulations subjected to differential selection at theAdh locus. TheAdh locus is the only one in which selection is detected in one environment. It is neutral in other environments. Theα-Gpdh, Aox andEst-6 polymorphisms, however, behave as though they were neutral both in the wine cellar and in the field.
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Muñoz-Serrano, A., Alonso-Moraga, A. & Rodero, A. Annual variation of enzyme polymorphism in four natural populations ofDrosophila melanogaster occupying different niches. Genetica 67, 121–129 (1985). https://doi.org/10.1007/BF02424418
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DOI: https://doi.org/10.1007/BF02424418