0000000001325525
AUTHOR
Francesc Mestres
Colonization of America by Drosophila subobscura: association between Odh gene haplotypes, lethal genes and chromosomal arrangements.
The colonization of America by Drosophila subobscura has been a unique exper iment in nature that has allowed us to explore the effects of evolution on a continental scale. To analyze this evolutionary event, nucleotide sequences of the Odh (Octanol dehydrogenase) gene were obtained for 43 lethal chromosomal lines from colonizing populations of North America and 5 from South America, in addition to 5 chromosomal lines from Europe with different viabilities and 2 from laboratory marker stocks. Since 10 different Odh haplotypes were found in America, the minimum number of colonizers would be 5 (or 3 mated females). Only one Odh haplotype was found in American O(5) inversions confirming that o…
Molecular variation in the Odh gene in Chilean natural populations of Drosophila subobscura
A 793-nucleotide fragment from the D. subobscura Odh gene was sequenced in 46 lethal chromosomal lines from two South American colonizing populations (18 from Santiago de Chile and 28 from Puerto Montt). Only eight different haplotypes were found and, with just one exception, all had previously been detected in North American samples. The exception probably corresponds to a genetic exchange between two American haplotypes. Our results confirm the loss in genetic variability due to the recent founder event, and the high resemblance between the two colonized hemispheres. One haplotype is entirely associated with the O5 inversion, the same association found in North America. Two different hapl…
XIMET – The Trans-University Educational Materials Exchange-Network with a Focus on Genetics
XiMET (Xarxa d'intercanvi de Materials Educatius Transuniversitària) es una red de innovación educativa y calidad docente formada por profesorado perteneciente a las Universidades de Valencia (UVEG), Universidad Politécnica de Valencia (UPV), la Universidad de Barcelona (UB) y la Universidad Autónoma de Madrid (UAM). Dicha red se ha establecido para la difusión de las acciones realizadas por el profesorado del departamento de Genética de la UVEG dentro de los grupos GEMEG y BIOPAC, y además facilitar la activación de alianzas de innovación interuniversitaria. Una tarea fundamental de XiMET es la elaboración de materiales docentes y objetos de aprendizaje multimedia, diseñados como apoyo par…