ISSN:
1617-4623
Keywords:
Transposable elements
;
Genome organization
;
Male recombination
;
hobo
;
GD sterility
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary P strains of Drosophila melanogaster are characterized by the presence of both full-length and deletion derivatives of the transposable element P in their genome, and by their ability to induce the syndrome of hybrid dysgenesis among the progeny of certain intra-strain crosses, when introduced through the male parents. In contrast, strains belonging to the M' class, and which were also found to bear P element-homologous sequences, lack this ability and this has been attributed to the presence in the genome of most of these strains of a distinct class of deletion derivatives termed KP, which can suppress the action of functional P factors. Here we demonstrate that KP elements are present, next to full-length ones, in the genome of at least three strains which induce P-M-like dysgenic symptoms, including GD sterility. KP elements form the majority of the P-homologous sequences in the strains MR-h12, 23.5/CyL 4 and the latter's derivative 23.5 */Cy. While the first one is a genuine P strain and the second one depicts a strong P cytotype, the third is a genuine M' strain. The hybrid dysgenesis induced by the two 23.5 MRF strains seems to be due, not primarily to the P elements, but to the action of hobo elements.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00331309
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