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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Variation at four enzyme loci in natural populations Drosophila melanogaster : factor analyses of genotypic and gametic associations Angeles ALONSO-MORAGA | Génét. Sél. Evol. 1988 20 1 15-24 Variation at four enzyme loci in natural populations of Drosophila melanogaster factor analyses of genotypic and gametic associations Angeles ALONSO-MORAGA and A. MUNOZ-SERRANO Facultad de Ciencias ưniversidad de Córdoba Departamento de Genética 14071 Córdoba Spain Facultad de Veterinaria Universidad de Córdoba Departamento de Genética 14071 Córdoba Spain Summary Factor analyses have been used to interpret spatial and temporal variation of genotype and gamete frequencies. Four loci alcohol dehydrogenase a-glycerophosphate dehydrogenase esterase-6 and aldehyde oxidase have been analyzed from two wine cellar and two field populations of Drosophila melanogaster collected during a one year period. The high correlations of the Adh locus with the first factor are postulated to be the manifestation of systematic pressures and those of Aidox with the second factor to be the manifestation of the stochastic pressures. The influence of the first factor is greater for a-Gpdh and Est-6 loci than that of the second factor. However it is proved that both factors act on the four loci. Key words factor analysis genetic variation natural population genotype frequency gamete frequency Drosophila melanogaster. Resume Variation de quatre locus enzymatiques dans des populations naturelles de Drosophila melanogaster analyse factorielle des associations génotypiques et gamétiques On a utilise 1 analyse factorielle pour interpreter la variation spatiale et temporelle des frequences génotypiques et gamétiques. On a analyse quatre locus alcool déshydrogénase a-glycerophosphate déshydrogénase estérase-6 et aldehyde oxydase de deux populations de cellier et deux populations de campagne de Drosophila melanogaster collectées pendant une année. On a postulé que les plus fortes corrélations du locus Adh avec le premier facteur s expliquent par des pressions systématiques et que celles du locus Aidox avec le deuxieme facteur s expliquent par des pressions .
