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Báo cáo sinh học: "The complex Robertsonian system of Dichroplus pratensis (Melanoplinae, Acrididae). I. Geographic distribution of fusion polymorphisms"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: The complex Robertsonian system of Dichroplus pratensis (Melanoplinae, Acrididae). I. Geographic distribution of fusion polymorphisms | I.N.R.A. C.R.J. Département de Génétique Animate BIBLIOTHÈQUE . p.-moon 09 o7n F- 78352 JOUY EN JOSAS Genet Sei Evol 1991 23 353-370 Elsevier INRA 353 Original article The complex Robertsonian system of Dichroplus pratensis Melanoplinae Acrididae . I. Geographic distribution of fusion polymorphisms CJ Bidau1 c Belinco2 p Mirol3 D Tosto3 1 Univer sidad National de Misiones Departamento de Genética Facultad de Cientias Exactas Quimicas y Naturales Felix de Azara 1552 6 Piso 3300 Posadas Misiones Argentina 2 Biological Sciences Center Dept of Genetics and Cell Biology 1445 Gartner Ave St Paul MN USA 3 Dept Ciencias Biológicas Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Laboratorio de Genética 1428 Buenos Aires Argentina Received 20 July 1990 accepted 17 June 1991 Summary A chromosomal survey was performed in Argentine natural populations of the South-American melanopline grasshopper Dichroplus pratensis Bruner Acrididae . The cytogenetic study of samples from different populations revealed the existence of at least 7 distinct Robertsonian translocations which involve the 6 L large autosomes of the 2n 20 ọ 19 cT all-telocentric standard karyotype. Some of the fusions thus share monobrachial homologies. The Robertsonian variation found in D pratensis is discussed in relation to a model of chromosomal evolution for the species in which the changes in recombination patterns produced by the fusions are central. centric fusion polymorphism polytypism grasshopper Resume - Le système robertsonien complexe de Dichroplus pratensis Melanoplinés Acrididés . I. Distribution géographique des polymorphismes de fusion. Une enquête chromosomique a été réalisée sur des populations naturelies de sauterelles mélanoplines Member of the Carrera del Investigador Cientifico y Tecnológico CONICET Correspondence and reprints 354 CJ Bidau et al sud-américaines Dichroplus pratensis Bruner Acrididés . L étude cytogénétique d echan-tillons en provenance de differentes .