In:
Genetical Research, Hindawi Limited, Vol. 69, No. 3 ( 1997-06), p. 197-208
Kurzfassung:
Until now, with regard to the hobo system of hybrid
dysgenesis, natural populations of Drosophila
melanogaster have been investigated using only two criteria: at
the molecular level, the presence or absence of Xho I fragments 2·6 kb long or smaller;
and/or at the genetic level, the ability to induce gonadal dysgenesis sterility in crosses A (females of an E reference
strain crossed with males under test) and A* (females under test crossed with males of an H
reference strain). Recently, analyses of laboratory strains using these criteria as well as the mobilization of
two reporter genes, the male recombination and the number of ‘TPE’ repeats in the
S region, revealed a lack of correlation between the different dysgenic parameters themselves, and also
between these parameters and the molecular characteristics of the strains. Thirteen current strains
derived from world populations were therefore investigated with regard to all these dysgenic traits,
to determine discriminating criteria providing a robust method of classifying natural populations
and deducing the dynamics of hobo elements in these populations. We show, as in laboratory
strains, a lack of correlation between the parameters studied. Therefore, the significance of each of
them as well as the nature of hobo hybrid dysgenesis are discussed, to propose an analysis
method of the hobo system
applicable to natural populations. According to the geographical distribution of hobo activities in
world populations and to the variable polymorphism of the number of ‘TPE’ repeats, we propose
a new scenario for the invasion of D. melanogaster by hobo elements.
Materialart:
Online-Ressource
ISSN:
0016-6723
,
1469-5073
DOI:
10.1017/S0016672397002826
Sprache:
Englisch
Verlag:
Hindawi Limited
Publikationsdatum:
1997
ZDB Id:
2412684-6
ZDB Id:
1472156-9
SSG:
12
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