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Báo cáo sinh học: " Starvation and desiccation tolerance in Drosophila melanogaster: differences between European, North African and Afrotropical populations"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Starvation and desiccation tolerance in Drosophila melanogaster: differences between European, North African and Afrotropical populations | 381 Genet Sei Evol 1990 22 381-391 Elsevier INRA Original article Starvation and desiccation tolerance in Drosophila melanogaster differences between European North African and Afrotropical populations JL Da Lage p Capy JR David CNRS Laboratoire de Biologie et Génétịque Evolutives 91198 Gif-sur-Yvette Cedex France Received 5 January 1990 accepted 13 July 1990 Summary Starvation tolerance mean survival time with water only and desiccation tolerance mean survival with no food and zero humidity were measured at 17 c in adult flies from 3 different geographic populations living in different climates. A fairly large uncontrolled variability was observed and two successive generations of the various isofemale lines were investigated for each population. For desiccation tolerance a Tunisian population from an oasis was found to be more tolerant than French or Congolian populations. For starvation tolerance the survival of the Congolian population was about twice the values found for French or Tunisian flies. It is suggested that the Afrotropical flies which live in a hot humid environment are poorly protected against desiccation but need a high starvation tolerance because of their high metabolic rate due to the high ambient temperature. Drosophila melanogaster geographic race ecological genetics I environmental stress Résumé Tolerance à 1 inanition et à la dessiccation chez Drosophila melanogaster differences entre populations d Europe d Afrique du Nord et d Afrique tropicale. La tolerance à I inanition durée de survie en presence seulement d eau et la tolerance à la dessiccation durée de survie sans nourriture en atmosphère sèche ont été étudiées à 17a c sur des mouches adultes provenant de 3 regions géographiques. Une assez forte variabilité non contrôlée a été observée et 2 generations successives ont été étudiées pour les diverses lignées isofemelles de chaque population. Pour la tolérance à la dessiccation la population tunisienne provenant d une oasis a été trouvée