SELECTION IN EXPERIMENTAL POPULATIONS OF DROSOPHILA MELANOGASTER WITH DIFFERENT GENETIC BACKGROUNDS
نویسندگان
چکیده
منابع مشابه
Selection in Experimental Populations of Drosophila Melanogaster with Different Genetic Backgrounds.
HE heterozygous carriers of some genetic variants are superior in fitness to Tthe corresponding homozygotes. The causation of this hybrid vigor or heterosis (euheterosis according to DOBZHANSKY 1952) constitutes an important but as yet little understood problem. One possibility is that some gene alleles are “overdominant” with respect to fitness, and thus give heterosis in heterozygous conditio...
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HE investigation reported in the present paper is of the effects of genetic T drift in three experimental populations of Drosophila melanogastar, two of which received treatments with gamma rays. Although there has been considerable theoretical discussion of genetic drift, few experimental studies of this phenomenon have been carried out. This paucity of experimental verification exists in spit...
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POPULATION biologists have long followed gene frequency changes in model populations in attempts to verify various aspects of the mathematical theory of natural selection. The selection has been assumed to be constant in many of these studies, although it is widely recognized (e.g., TEISSIER 1954) that the selection in fact fluctuates with the physical and biological elements of the environment...
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HE existence of polymorphisms in many populations is a well established fact, but the ways in which they get started are not understood. This study was undertaken to throw some light on the subject by observations on a mutant which, while presumably not polymorphic in the population wherein it arose, nevertheless tended to persist in laboratory cultures. The mutant gene was studied in a variety...
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We have studied linkage disequilibrium in Drosophila melanogaster in two samples from a wild population and in four large laboratory populations derived from the wild samples. We have assayed four polymorphic enzyme loci, fairly closely linked in the third chromosome: Sod Est-6, Pgm, and Odh. The assay method used allows us to identify the allele associations separately in each of the two homol...
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ژورنال
عنوان ژورنال: Genetics
سال: 1964
ISSN: 1943-2631
DOI: 10.1093/genetics/50.1.81