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Isozyme variability in species of the genusDrosophila. VIII. The alcohol dehydrogenase polymorphism in north carolina populations ofD. melanogaster

โœ Scribed by F. M. Johnson; P. M. Burrows

Publisher
Springer
Year
1976
Tongue
English
Weight
608 KB
Volume
14
Category
Article
ISSN
0006-2928

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โœฆ Synopsis

Adult Drosophila melanogaster flies collected from populations broadly dispersed over ecological and geographic strata of North Carolina, and over a period of 4 years, were analyzed for alcohol dehydrogenase phenotypes by gel electrophoresis. Gene frequencies in spring-summer-fall field collections were remarkably stable over all strata. Two winter collections exhibited contrasting gene frequency changes. In one case the results are interpreted in terms of long-distance migration from Florida, while the other is explicable by assignment of a causal role to environmental factors which accompany the winter season.

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Isozyme variability in species of the ge
Isozyme variability in species of the genusDrosophila. VI. Frequency-property-environment relationships of allelic alcohol dehydrogenases inD. melanogaster
โœ C. L. Vigue; F. M. Johnson ๐Ÿ“‚ Article ๐Ÿ“… 1973 ๐Ÿ› Springer ๐ŸŒ English โš– 746 KB

Drosophila melanogaster from naturally occurring populations in the Eastern United States were examined by gel electrophoresis for their alcohol dehydrogenase (ADH) phenotype. The ADH enzymes were partially purified and characterized. Frequencies of the controlling alleles, Adh 4 and Adh 6, were dis

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Isozyme variability in species of the genusDrosophila. VII. Genotype-environment relationships in populations ofD. melanogasterfrom the eastern United States
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Collections of D. melanogaster were analyzed for genetic variation at nine enzyme loci. Allelic .frequencies were determined, and comparisons between observed phenotypic proportions and those expected under equilibrium conditions were made. A significant tendency toward homozygote excess was noted.