starvation and desiccation tolerance in drosophila melanogaster differences between european, north african and afrotropical populations饥饿和脱水耐性的黑腹果蝇区别欧洲、北非和afrotropical人群.pdfVIP

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starvation and desiccation tolerance in drosophila melanogaster differences between european, north african and afrotropical populations饥饿和脱水耐性的黑腹果蝇区别欧洲、北非和afrotropical人群.pdf

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starvation and desiccation tolerance in drosophila melanogaster differences between european, north african and afrotropical populations饥饿和脱水耐性的黑腹果蝇区别欧洲、北非和afrotropical人群

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 Génétique Evolutives, ’ 91198 Cif sur-Yvette Cedex, !1-ance (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 / environmental stress Résumé mdash; Tolérance à l’inanition et à la dessiccation chez Drosophila melanogaster : différences entre populations d’Europe, d’Afrique du Nord et d’Afrique tropicale. La tolérance à l’inanition (durée de survie en présence seulement d’eau) et la tolérance à la dessiccation (durée de survie sans nourriture en atmosphét!e sèche) ont été étudiées à 170 C sur des mouches adultes provenant de9 régions géographiques. Une ass