Publications by authors named "Nicole Chaminade"
Article Synopsis
- - Recent studies on Drosophila simulans have shown the emergence of X-linked segregation distorters, termed the "Paris" system, leading to the selection of Y chromosomes resistant to these distorters, with observable variation in the proportion of female progeny they produce.
- - Analysis of 386 Y chromosomes indicates a continuum of response to the Paris system, revealing only three polymorphic sites resulting in three distinct haplotypes, with one haplotype associated with resistance found fixed in Sub-Saharan African samples.
- - The rapid evolution and replacement of susceptible Y chromosomes by the resistant haplotype were documented in populations from Egypt and Morocco within a few years, highlighting the influence of intragenomic conflicts and suggesting the rapid emergence
The hAT transposons, very abundant in all kingdoms, have a common evolutionary origin probably predating the plant-fungi-animal divergence. In this paper we present their general characteristics. Members of this superfamily belong to Class II transposable elements.
View Article and Find Full Text PDFBackground: The study of P element repression in Drosophila melanogaster led to the discovery of the telomeric Trans-Silencing Effect (TSE), a homology-dependent repression mechanism by which a P-transgene inserted in subtelomeric heterochromatin (Telomeric Associated Sequences, "TAS") has the capacity to repress in trans, in the female germline, a homologous P-lacZ transgene located in euchromatin. TSE can show variegation in ovaries, displays a maternal effect as well as an epigenetic transmission through meiosis and involves heterochromatin and RNA silencing pathways.
Principal Findings: Here, we analyze phenotypic and genetic properties of TSE.
Sex-ratio meiotic drive is the preferential transmission of the X chromosome by XY males, which occurs in several Drosophila species and results in female-biased progeny. Although the trait has long been known to exist, its molecular basis remains completely unknown. Here we report a fine-mapping experiment designed to characterize the major drive locus on a sex-ratio X chromosome of Drosophila simulans originating from the Seychelles (XSR6).
View Article and Find Full Text PDFThis review deals with the differences between Drosophila melanogaster and Drosophila simulans in their mitotic and polytene chromosomes. The description of the mitotic karyotypes of D. melanogaster and D.
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