TAILIEUCHUNG - Báo cáo khoa hoc:" Genetic differentiation and evolutionary process of speciation in the Idotea chelipes complex"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Genetic differentiation and evolutionary process of speciation in the Idotea chelipes complex | Genet. Sei. Evol. 30 1998 289-303 Inra Elsevier Paris 289 Original article Genetic differentiation and evolutionary process of speciation in the Idotea chelipes complex Crustacea Isopoda Faouzia Charfi-Cheikhrouhaa Marc Laulierb Emmanuelle Hamelin0 Jean-Pierre Mocquard0 a Laboratoire de biologie animale faculte des sciences campus universitaire 1060 Tunis Tunisia b Laboratoire de biologie animale faculte des sciences Avenue Olivier Messiaen 72085 Le Mans cedex France c Laboratoire de génétique et biologic des populations de crustacés 40 Avenue du Recteur Pineau 86022 Poitiers cedex France Received 29 December 1997 accepted 7 April 1998 Abstract - Genetic differentiation and evolutionary relationships among 12 populations representing three subspecies of the polytypic Idotea chelipes were studied by examining geographic variation at 13 loci assayed using polyacrylamide gel electrophoresis. Interbreeding tests and isozyme variations were investigated to compare these three subspecies and Idotea balthica and to see whether morphological differences coincided with genetic differentiation. A dendrogram using Nei s genetic distance values and a pattern of speciation are reported. The taxinomic status both specific and subspecific were confirmed. Inra Elsevier Paris Idotea cross breed genetic distance I speciation Resume Differenciation génétique et processus evolutif de la speciation d Idotea chelipes Crustacé Isopode . Idotea chelipes a été déíỉnie sur la base des critères morphologiques et de 1 hémocyanine comme espèce polytypique qui groupe trois sous-espèces I. c. bocqueti I. c. mediterranea et I. c. chelipes. Le statut taxinomique de ces trois sous-espèces est reexamine en utilisant les données du polymorphisme enzymatique et les résultats des tests d interfertilite par comparaison avec une autre espèce Idotea balthica. Douze populations d Z. chelipes ont été analysées par électrophorềse sur gel de polyacrylamide mettant en evidence 13 loci. A partir des frequences

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