Polytypic and polymorphic cytogenetic variations in the widespread anuran Physalaemus cuvieri (Anura, Leiuperidae) with emphasis on nucleolar organizing regions
Biol. Res
;
42(1): 79-92, 2009. ilus, tab, mapas
Article
in English
| LILACS
| ID: lil-519086
ABSTRACT
We investigated the NOR distribution in ten populations of Physalaemus cuvieri from different regions of Brazil and Argentina. A high variability in NOR pattern was observed and provided a useful tool in grouping several populations. The specimens from the state of Tocantins, northern Brazil, could easily be distinguished from all the other analyzed populations, since its karyotype presented NORs in the chromosome pairs 1,3,4 and 10 (and sometimes also in chromosome 5), and several pericentromeric C-bands. A NOR-site in chromosome 9 characterized three populations from the northeastern region of Brazil. Interestingly, the P. cuvieri populations located in opposite extremes of the geographic distribution had, as a fixed condition, the presence of NORs in 8q int and llp. Besides interpopulational divergences, intrapopulational variability was observed in the number of NORs, except for populations from the states of Bahia and Minas Gerais, which are boundary states respectively in the northeastern and southeastern regions of Brazil. In relation to NOR size, interindividual variations occurred in all Brazilian and Argentinean populations. Additionally, intraindividual variability in NOR size was detected in specimens from Minas Gerais. The data presented herein revealed substantial geographic polytypic variation in P. cuvieri and indicated that a taxonomic reexamination of this species is necessary.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Anura
/
Polymorphism, Genetic
/
Nucleolus Organizer Region
Limits:
Animals
Country/Region as subject:
South America
/
Argentina
/
Brazil
Language:
English
Journal:
Biol. Res
Journal subject:
Biology
Year:
2009
Type:
Article
/
Project document
Affiliation country:
Argentina
/
Brazil
Institution/Affiliation country:
Universidad Nacional de Misiones/AR
/
Universidade Estadual de Campinas/BR
/
Universidade Federal do Maranhão/BR
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