
Chromosome Polymorphism, Geographical Variation and Karyotypes in Sauria
1972; University of Florence; Volume: 25; Issue: 3 Linguagem: Inglês
10.1080/00087114.1972.10796485
ISSN2165-5391
AutoresMaria Luiza Beçak, Willy Beçak, Leonor Denaro,
Tópico(s)Amphibian and Reptile Biology
ResumoSUMMARYA comparative cytogenetic study was done on ten lacertilian species belonging to six families: Iguanidae, Teiidae, Amphisbaenidae, Gekkonidae, Anguidae and Scincidae.Intra-individual and intrapopulational karyotype variations apparently stemming from differences in the number of chromosomes were observed in the iguanid Tropidurus torquatus from Minas Gerais and Maranhão. A heteromorphic autosomal pair was found in another population (São Paulo) of the same species. The geographical variation may be related to the process of speciation.Intra-individual differences in the number of macro — and microchromosomes were found in a population of Amphisbaena dubia. For every new acrocentric macrochromosome, a decrease of two microchromosomes was observed. The chromosomal variation may be due to a fusion/fission process or to somatic segregation involving macro — and microchromosomes.
Referência(s)