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Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Parallel selection of ethanol and acetic-acid tolerance in Drosophila melanogaster populations from India | Genet Sei Evol 1994 26 485-494 Elsevier INRA 485 Original article Parallel selection of ethanol and acetic-acid tolerance in Drosophila melanogaster populations from India R Parkash Shamina Neena Department of Biosciences Maharshi Dayanand University Rohtak 124001 India Received 10 September 1993 accepted 23 June 1994 Summary - Nine Indian geographical populations of Drosophila melanogaster collected along the 20 N latitudinal range revealed a significant clinal variation at the alcohol dehydrogenase Adh locus AdhF allelic frequency increasing significantly with latitude 0.036 0.004 for 1 latitude genetic divergence Fst 0.25 . Patterns of ethanol and acetic-acid tolerance in adult individuals revealed significant genetic divergence. Parallel patterns of latitudinal ethanol tolerance 10 to 15 and acetic-acid tolerance 3.7 to 13.2 were observed in adult individuals from the 9 geographical populations. Thus the northern and southern populations revealed divergence in the patterns of resource utilisation. The parallel latitudinal genetic divergence at the Adh locus and for ethanol and acetic-acid tolerance in Indian populations of Drosophila melanogaster could be explained by balancing natural selection varying spatially along the north-south axis of the Indian subcontinent. ADH polymorphism ethanol tolerance acetic-acid tolerance latitudinal clines Indian populations Drosophila melanogaster Resume Selection parallèle des tolerances à 1 éthanol et à 1 acide acétique dans des populations indiennes de Drosophila melanogaster. Neuf populations géographiques indiennes de Drosophila melanogaster échelonnées sur une latitude de 20 N révèlent une variation clinale significative au locus de I alcool déshydrogénase AdhJ avec un accroissement significatif de la frequence de I allele Adi avec la latitude 0 036 0 004 par degré de latitude et un indice de fixation F ST 0 25. Des evolutions parallèles de la tolerance à 1 éthanol 10 à 15 et de la tolerance à I acide acétique 3 7 à 13
