Divergent selection on locomotor activity in Drosophila melanogaster. III. Genetic analysis.
Divergent directional selection produced three pairs of lines each consisting of a line with high and a line with low locomotor activity. Reciprocal crosses between the high and low lines of one of these pairs showed that a considerable part of the activity differences was contributed by differences between the X chromosomes. This was confirmed by a substitution of the three large chromosomes, between the low and the high lines. The two large autosomal chromosomes had only minor effects. Interactions between chromosomes were sometimes significant. Low-activity alleles tended to be dominant over alleles for high activity.
D000818:Animals; D002875:Chromosomes / Q000502:physiology; D003433:Crosses, Genetic; D004331:Drosophila melanogaster / Q000235:genetics; D005260:Female; D005799:Genes, Dominant; D008124:Locomotion; D008297:Male; D012641:Selection, Genetic; D014960:X Chromosome / Q000502:physiology