Malpighian tubule polytene chromosomes of Culex quinquefasciatus (Diptera, Culicinae)
Mem. Inst. Oswaldo Cruz
; 98(3): 383-386, Apr. 2003. ilus
Article
em En
| LILACS
| ID: lil-340119
Biblioteca responsável:
BR1.1
RESUMO
Dipteran polytene chromosomes provide an excellent model for understanding in species complexes, as well as for structural and functional cytogenetics. The status of species in the Culex pipiens complex is controversial and the use of polytene chromosomes for cytogenetic analysis in the subfamily Culicinae has been difficult because of methodological problems. In this study, Malpighian tubule polytene chromosomes were obtained from young (0 to 12 h, 20ºC) and old (20 to 42 h, 28ºC) laboratory-bred C. pipiens quinquefasciatus pupae. The chromosome maps for this species were constructed and compared with published data for C. pipiens pipiens and C. p. quinquefasciatus. Although the banding patterns were conserved between subspecies, analysis of the structural variations in the bands and interbands revealed differences apparently related to the physiological stage and ecogeographical strain. The organization of the centromeric regions in larval and pupal chromosomes showed greater similarity to each other than did those of pupal and adult chromosomes. The use of pupal polytene chromosomes for in situ hybridization with vector competence probes is discussed
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Mapeamento Cromossômico
/
Culex
/
Túbulos de Malpighi
Limite:
Animals
Idioma:
En
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
MEDICINA TROPICAL
/
PARASITOLOGIA
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil