tailieunhanh - báo cáo khoa học: " Presence of the deleted hobo element Th in Eurasian populations 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: Presence of the deleted hobo element Th in Eurasian populations of Drosophila melanogaster | 107 Genet. Sei. Evol. 1989 21 107-111 Elsevier INRA Original article Presence of the deleted hobo element Th in Eurasian populations of Drosophila melanogaster G. Periquet 1 . Hamelin 1 Y. Bigot1 and Kai Hu 2 1 Institutde Biocdnotique Expérimentale des Agrosystèmes Facultd des Sciences Parc Grandmont 37200 Tours France 2 Biology Department University of Hainan Hainandao Peoples Republic of China received 3-1-1988 accepted 6-7-1988 Summary Molecular analysis has revealed the presence of a specific deletion-derivative hobo element the Th element in all current strains of Drosophila melanogaster examined throughout the Eurasian continent. The Th element is characterized by an internal deletion of kb as compared to the complete hobo element. The presence of this element in natural populations raises the question of its possible role in the regulation of the hobo system. Drosophila- transposable elements - hobo - populations Résumé Présence de 1 élément hobo délété Th dans les populations eurasiennes de Drosophila melanogaster Un element hobo defectif element Th présentant une deletion interne de 1 5 kb a été mis en évidence par analyse moléculaire. Cet élément est present dims toutes les souches actuelles de Drosophila melanogaster examinees sur le continent eurasien. Sa presence dans les populations naturelles pose la question de son rôle éventuel dans le mécanisme de régu-lation du système hobo. Drosophila - éléments transposables - hobo - populations Introduction In Drosophila melanogaster the progeny of certain out-crosses is characterized by a number of germline abnormalities including chromosome breakage high mutation rates sterility and male recombination. This syndrome has been termed hybrid dysgenesis Kidwell eta . 1977 . Three independent systems of transposable elements p hobo can produce these anomalies through the interaction of chromosomal cytoplasmic and environmental factors see reviews by Blackman and Gelbart 1988 Engels 1988 Louis and .