Abstract
Genetic determinants of egg production were studied in two inbred lines of Drosophila melanogaster. Chromosome III was the only one responsible for differences in egg laying between them; its effect is completely dominant. By means of a marker stock, synthetic chromosomes were constructed consisting of known portions of the two third chromosomes but without carrying any marker genes themselves. Chromosome III was thus divided into seven regions. It was shown that genes with effect over the trait are concentrated on the left arm of the chromosome displaying complete dominance. A factor was located on the left end of this chromosomic arm having a major effect on the trait (33·10 ± 4·96 eggs/female/day) by interaction with contiguous regions. A short segment including the located factor (or possibly the factor itself) acts as a dominance modifier and also as a segregation suppressor in contiguous segments.
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Dominguez, A., Rubio, J. Analysis of genetic factors affecting egg production in Drosophila melanogaster. Heredity 57, 305–313 (1986). https://doi.org/10.1038/hdy.1986.127
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DOI: https://doi.org/10.1038/hdy.1986.127
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