Abstract
Using data from in situ hybridization of the giant chromosomes from salivary glands, we have studied hobo mobile element copy numbers in 17 genomes of highly inbred lines of Drosophila melanogaster. A high number of insertions in the 3R arm and a high variance in total copy number characterize the hobo element. The genomic control of copy number (a compensatory effect among chromosome arms) detected previously for mdg-1, I and copia but not for P, was not found for hobo either, and there is no relation between the P and hobo copy numbers per line. From the DNA structure and putative mechanisms of transposition of each element, we suggest that the mechanism of transposition, involving either a reverse transcriptase or a transposase, is a good criterion for determining the way the copy number is regulated.
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Biémont, C., Gautier, C. & Heizmann, A. Independent regulation of mobile element copy number in Drosophila melanogaster inbred lines. Chromosoma 96, 291–294 (1988). https://doi.org/10.1007/BF00286916
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DOI: https://doi.org/10.1007/BF00286916