Las homeoproteínas dirigen el desarrollo embrionario de los organismos mediante la unión del homeodominio al DNA y su interacción con otras proteínas. Antennapedia (Antp) se encarga formar patas alas en tórax e interactúa TFIIEβ a través D. melanogaster. En este trabajo mostramos que únicamente dos aminoácidos Antp son necesarios para formación patas. La función estas interacciones contribuye c...

Shrub encroachment, a global phenomenon with management implications, is examined in two papers in the current issue of Applied Vegetation Science. Barbosa da Silva et al. show that encroachment simplifies herbaceous community, and Pittarello et al. illustrate how pastoral practices can restore encroached grasslands. While detrimental effects of shrub encroachment on grassland vegetation are of...

Drosophila serido Vilela & Sene is a polytypic and cactophilic species with broad geographic distribution in Brazil. The morphology of the aedeagi of eight natural populations of D. serido was analyzed. Based on features of their aedeagi, populations of D. serido were discriminated with an efficiency of nearly 75%. The analysis using the Mantel test suggests that the morphological divergence of...

Molecular differentiation between races or closely related species is often incongruent with the reproductive divergence of the taxa of interest. Shared ancient polymorphism and/or introgression during secondary contact may be responsible for the incongruence. At loci contributing to speciation, these two complications should be minimized (1, 2); hence, their variation may more faithfully refle...

Carlos Alberto Gómez-Aldapa1, Ma. del Refugio Torres-Vitela2, Angélica Villarruel-López2 and Javier Castro-Rosas1* 1Center of Chemical Research, Institute of Basic Sciences and Engineering Autonomous University of Hidalgo State, City of Knowledge Carretera Pachuca-Tulancingo, Mineral de la Reforma, Hidalgo 2Laboratory of Food Safety, University Center of Exact Sciences and Engineering Universit...

In Drosophila melanogaster and Drosophila simulans, positive Darwinian selection drives high rates of evolution of male reproductive genes, and accessory gland proteins (Acps) in particular. Here, we tested whether 13 X-linked male-specific genes, 4 Acps and 9 non-Acps, are under selective forces in the Drosophila pseudoobscura species group, much as those in the D. melanogaster group. We obser...

In several Drosophila species, the XY Mendelian ratio is disturbed by X-linked segregation distorters (sex-ratio drive). We used a collection of recombinants between a nondistorting chromosome and a distorting X chromosome originating from the Seychelles to map a candidate sex-ratio region in Drosophila simulans using molecular biallelic markers. Our data were compatible with the presence of a ...