tailieunhanh - Báo cáo sinh học: "properties related Drosophila melanogaster strains with altered fitness also show changes in their hobo element "

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: properties related Drosophila melanogaster strains with altered fitness also show changes in their hobo element | Genet Sei Evol 1994 26 205-216 Elsevier INRA 205 Original article Closely related Drosophila melanogaster strains with altered fitness also show changes in their hobo element properties VN Bolshakov1 AP Galkin2 LZ Kaidanov2 VA Gvozdev3 c Louis1 4 1 Institute of Molecular Biology and Biotechnology FORTH PO Box 1527 Heraklion Crete Greece 2 Saint Petersburg State University Department of Genetics Saint Petersburg Russia 3 Russian Academy of Sciences Institute of Molecular Genetics Moscow Russia 4 University of Crete Department of Biology Heraklion Crete Greece Received 4 August 1993 accepted 5 January 1994 Summary - A set of Drosophila melanogaster strains of common origin but with different fitness characteristics established either spontaneously or after selection for the specific fitness parameters appear to induce non-P-element-mediated gonadal atrophy in appropriate crosses to tester strains containing or lacking hobo elements H and E strains . Using the gonadal dystrophy GD sterility assay as well as genomic Southern blot hybridization and in situ hybridization on polytene chromosomes it was found that all these strains possess hobo elements whose dysgenic activity composition copy number and cytogenetic locations appeared to be variable. In general low fitness strains have moderate hobo-activity and hobo-repression potentials while high fitness strains show no hobo-activity but also quite high hobo-repression potentials. Although distinct differences in the composition copy number and location of the hobo elements in the genome were observed between these 2 groups of strains these variations did not show any profound correlation with either hobo-related dysgenic potential or the fitness of the strains. Drosophila melanogaster I selection fitness transposable element hobo Resume Des souches étroitement apparentées de Drosophila melanogaster avec des aptitudes reproductives modifiees manifestent aussi des changements dans les propriétés de leurs éléments