Genetic variability among populations of Lutzomyia (Psathyromyia) shannoni (Dyar 1929) (Diptera: Psychodidae: Phlebotominae) in Colombia
Mem. Inst. Oswaldo Cruz
; 96(2): 189-96, Feb. 2001. ilus, mapas, tab
Article
em En
| LILACS
| ID: lil-281567
Biblioteca responsável:
BR1.1
RESUMO
Polyacrylamide gel electrophoresis was used to elucidate genetic variation at 13 isozyme loci among forest populations of Lutzomyia shannoni from three widely separated locations in Colombia Palambí (Nariño Department), Cimitarra (Santander Department) and Chinácota (Norte de Santander Department). These samples were compared with a laboratory colony originating from the Magdalena Valley in Central Colombia. The mean heterozygosity ranged from 16 to 22 percent, with 2.1 to 2.6 alleles detected per locus. Nei's genetic distances among populations were low, ranging from 0.011 to 0.049. The estimated number of migrants (Nm=3.8) based on Wright's F-Statistic, F ST, indicated low levels of gene flow among Lu. shannoni forest populations. This low level of migration indicates that the spread of stomatitis virus occurs via infected host, not by infected insect. In the colony sample of 79 individuals, the Gpi locus was homozygotic (0.62/0.62) in all females and heterozygotic (0.62/0.72) in all males. Although this phenomenon is probably a consequence of colonization, it indicates that Gpi is linked to a sex determining locus
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Psychodidae
/
Variação Genética
Limite:
Animals
País/Região como assunto:
America do sul
/
Colombia
Idioma:
En
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
MEDICINA TROPICAL
/
PARASITOLOGIA
Ano de publicação:
2001
Tipo de documento:
Article
/
Project document
País de afiliação:
Brasil
/
Colômbia
/
Estados Unidos
País de publicação:
Brasil