GIMENEZ mabel dionisia
TWO EXCEPTIONAL SOUTH AMERICAN MODELS FOR THE STUDY OF CHROMOSOMAL EVOLUTION: THE TUCURA DICHROPLUS PRATENSIS AND THE TUCO-TUCOS OF THE GENUS CTENOMYS
CLAUDIO J. BIDAU; DARDO A. MARTÍ; MABEL D. GIMÉNEZ
Historia Natural (Segunda Serie)
Fundación de Historia Natural 'Félix de Azara'
Lugar: Buenos Aires; Año: 2003 vol. II p. 53 - 72
In this work, we summarize the contributions that our research group has produced along more than 20 years, to the evolutionary biology of the grasshoppers of the genus Dichroplus (Orthoptera, Acrididae, Melanoplinae) y and the burrowing rodents of the genus Ctenomys (Rodentia, Ctenomyidae, Ctenomyinae). We especially emphasize their value as models for the study of the relevance of chromosomal rearrangements in microevolution (chromosomal polymorphisms) and macroevolution (chromosomal speciation), and the different approaches we have imprinted to their study along the years, such as population cytogenetics, karyotypic and meiotic studies, morphological and systematic analyses and finally, the macroecological and biogeographical research We also review the techniques that we have incorporated to our studies along these years, such as electron microscopy of syanptonemal complexes, analyses offemale meiosis, molecular cytogenetics techniques such as restriction enzyme banding and FISH ('fluorescent in situ hybridization'), and sequencing of mitochondrial genes.We conclude that it is only with a multidisciplinary approach that it is possible to ellucidate the complexities involved in the evolutionary biology of any group of living organisms.