The complex Robertsonian system of Dichroplus pratensis (Melanoplinae, Acrididae). I : Geographic distribution of fusion polymorphisms

• Published in: Genetics selection evolution (Paris) Vol. 23; no. 5-6; pp. 353 - 370
• Main Authors: BIDAU, C. J, BELINCO, C, MIROL, P, TOSTO, D
• Format: Journal Article
• Language: English
• Published: Les Ulis EDP Sciences 15.12.1991; BioMed Central Ltd; BioMed Central; BMC
• Subjects: Acrididae; Animal genetics; Animals; Biological and medical sciences; Cytogenetics; Dichroplus pratensis; Fundamental and applied biological sciences. Psychology; Genetics; Genetics of eukaryotes. Biological and molecular evolution; Invertebrata; Life Sciences; Orthoptera; South America; Argentina; America; Chromosomal aberration; Insecta; Orthoptera; Meiosis; Population genetics; Acrididae; Arthropoda; Cytogenetics; Acridoidea; Abnormal chromosome; Frequency; Invertebrata; Karyotype; Geographical variation; Polymorphism; Chromosome translocation
• ISSN: 0999-193X; 1297-9686; 1297-9686
• DOI: 10.1186/1297-9686-23-5-353

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 (female)/19(male) 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. (DBO)