tailieunhanh - báo cáo khoa học: "Variability of eye colour mutations in natural of Drosophila melanogaster"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Variability of eye colour mutations in natural of Drosophila melanogaster | Génét. Sét. Evol. 1988 20 1 25-36 Variability of eye colour mutations in natural populations of Drosophila melanogaster Carmen NÁJERA and . MÉNSUA Facultad de Ciencias Biọlógicas Universidad de Valencia Departamento de Genética D Moliner 50 Burjasot Valencia Spain Summary In order to compare the variability of eye colour mutations in natural populations of D. melanogaster six captures were carried out in three different habitats cellar vineyard and pinewood and at two different seasons of the year spring and autumn . Inbreeding by F pair mating of isolated wild females was used and eight pairs of this p generation were crossed. The total number of heterozygous loci was 87 the average proportion of heterozygous females and the average number of mutations per female the total number of mutations per fly being significantly higher in the cellar habitat. There were no significant differences between the seasons. The effective sizes estimated were high in all cases cellar 12 000 vineyard 15 000 and pinewood 17 500 and the average heterozygosity low . Key words D. melanogaster natural population genetic variability eye colour mutation. Resume Variabilité des mutations de la couleur des yeux dans des populations naturelies de Drosophila melanogaster Le polymorphisme de la couleur des yeux a été étudié dans des populations naturelles de à partir de six échantillons captures au printemps et à 1 automne dans trois habitats differents cave vignoble et pinède . La recherche des mutations récessives a été effectuee en croisant pour chaque femelle sauvage isolée huit couples de ses descendants appartenant à la générạtion F . Le nombre total de locụs en hétérozygotie est de 87 la proportion moyenne de femelles heterozygotes 40 68 et le nombre moyen de mutations par femelle 0 47. Le nombre de mutations par mouche est significativement plus élevé dans les populations de cave mais ne vane pas avec les saisons. L effectif génétique des populations .