TAILIEUCHUNG - báo cáo khoa học: "Sexual isolation between Drosophila melanogaster females and Drosophila simulans males. I - Relation between homospecific and heterospecific mating success."

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Sexual isolation between Drosophila melanogaster females and Drosophila simulans males. I - Relation between homospecific and heterospecific mating success. | Génét. Sél. Evol. 1987 19 1 21-36 Sexual isolation between Drosophila melanogasterfemales and Drosophila simulans males. I - Relation between homospecific and heterospecific mating success. Maria c. CARRACEDO and p. CASARES Departamento de Genetica Universidad de Oviedo Julian Claveria sin 33006 Oviedo Spain Summary The mating performances of D. melanogaster females andI D. simulans males have been examined in homospecific and heterospecific crosses Isofemale lines of D melanogaster and D. simulans selected according to their previous high intermediate and low hybridization values in crosses between melanogaster females and simulans males were used. The dynamics of mating success as flies reached sexual maturity was examined. Female sexual maturity of the isofemale lines estimated from mating frequency gradually increased with ageing. Around 10 p. 100 of females were sexually mature in the first 24 hr and the maximum value was attained roughly at day 3. Important differences in the speed of sexual maturity were found between the D. melanogaster lines. In D. simulans differences between lines were small. Hybridization was not restricted to young females as adults also hybridized on day 4 of life. In this sense females played a more important role than males. Notably the hybridization success of D. melanogaster females was directly related with their speed in attaining sexual maturity. However no relation was found in D. stmulans males between their hybridization success and their mating behaviour with homospecific females. Sexual isolation and mating propensities are discussed in the light of current mating theories. Key words Sexual isolation mating success sexual maturity Drosophila melanogaster Drosophila simulans. Resume Isolement sexuel entre ewe es Drosophila melanogaster et males DrosophilaI simulans . relation entre réussites d accouplements homospecifiques et hétérospécifiques L aptitude à 1 accouplement au sein de 1 espèce d une part croisements .

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