TAILIEUCHUNG - báo cáo khoa học: "Selection for abdominal bristle number in Drosophila subobscura, a highly polymorphic species"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Selection for abdominal bristle number in Drosophila subobscura, a highly polymorphic species | Ị Génét. Sél. Evol. 1986 18 4 427-436 Selection for abdominal bristle number in Drosophila subobscura a highly polymorphic species for gene arrangements Maria-Jose MARTINEZ-SEBASTIAN and . MENSUA Departamento de Genetica Facultad de Ciencias Biológicas Avd. Dr. Moliner 50 Burjasot Valencia Spain Summary Two replicate selection lines for abdominal bristle number in both high and low directions and 2 control lines were established from a laboratory population of Drosophila subobscura and were run for 23-24 generations. The sum of the bristles on the 4th and 5th abdominal sternites was the criterion of selection and the intensity of selection used was 20 p. 100. Response to selection was very similar to the response obtained by other authors in Drosophila melanogaster. This indicates that the behaviour of the genotype responsible for the abdominal bristle number may be similar in the 2 species in spite of the fact that Drosophila subobscura is very rich in chromosomal polymorphisms and Drosophila melanogaster is very poor. Key words Artificial selection neutral trait Drosophila subobscura. Résumé Selection pour le nombre de soles abdominales chez Drosophila subobscura espèce très polymorphe pour les arrangements génìques On a établi 2 lignées de selection haute et basse pour le nombre de soies abdominales ainsi que 2 lignées témoins à partir d une population de laboratoire de Drosophila subobscura. On a conduit la selection pendant 23-24 generations. Le caractère sélectionné etait le nombre de soies des 4C et 5e sternites de 1 abdomen et rintensité de selection était de 20 p. 100. La réponse à la selection a été semblable à celle obtenue par d autres auteurs chez Drosophila melanogaster. Cette concordance indique que la nature du genotype responsable du nombre de soies abdominales peut être similaire dans les 2 espèces bien que Drosophila subobscura montre un polymorphisme chromosomique beaucoup plus riche que Drosophila melanogaster. Mots clés Selection .

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