Abstract
Using in situ hybridisation to the giant chromosomes of salivary glands, mdg-1 mobile element polymorphism was studied in individuals of Drosophila melanogaster from a mass-mated population and from inbred lines established from this population (analysed at the 15th, 27th and 35th generations). The number of mdg-1 copies and the number of heterozygous insertion sites were estimated in the expected hybrids, which resulted from theoretically crossing the inbred lines. The mean number of labelling sites in hybrids that originated from lines from the 35th generation was equal to 30·5 and was similar to the value observed in the initial population. An average proportion of heterozygous sites of 0·85 (with a range from 0·62 to 0·96), and an average number of copies of 35 (29 to 44) were found in these hybrids. These values may be considered as valid estimates of the values in the initial population. Other measurements of genetic heterogeneity, determined on the mass-mated population and the inbred lines, are proposed and discussed.
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Biémont, C., Gautier, C. Mdg-1 mobile element heterozygosity in Drosophila melanogaster. Heredity 58, 167–172 (1987). https://doi.org/10.1038/hdy.1987.30
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DOI: https://doi.org/10.1038/hdy.1987.30
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