Inheritance of resistance to Bacillus thuringiensis subsp. kurstaki in Trichoplusia ni.
Appl Environ Microbiol
; 70(10): 5859-67, 2004 Oct.
Article
em En
| MEDLINE
| ID: mdl-15466525
ABSTRACT
The genetic inheritance of resistance to a commercial formulation of Bacillus thuringiensis subsp. kurstaki was examined in a Trichoplusia ni colony initiated from a resistant population present in a commercial vegetable greenhouse in British Columbia, Canada. Progeny of F(1) reciprocal crosses and backcrosses between F(1) larvae and resistant (P(R)) and susceptible (P(S)) populations were assayed at different B. thuringiensis subsp. kurstaki concentrations. The responses of progeny of reciprocal F(1) crosses were identical, indicating that the resistant trait was autosomal. The 50% lethal concentration for the F(1) larvae was slightly higher than that for P(S), suggesting that resistance is partially recessive. The responses of both backcross progeny (F(1) x P(R), F(1) x P(S)) did not correspond to predictions from a single-locus model. The inclusion of a nonhomozygous resistant parental line in the monogenic model significantly increased the correspondence between the expected and observed results for the F(1) x P(R) backcross but decreased the correspondence with the F(1) x P(S) backcross results. This finding suggests that resistance to B. thuringiensis subsp. kurstaki in this T. ni population is due to more than one gene.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Contexto em Saúde:
2_ODS3
Problema de saúde:
2_enfermedades_transmissibles
Assunto principal:
Bacillus thuringiensis
/
Controle Biológico de Vetores
/
Lepidópteros
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Appl Environ Microbiol
Ano de publicação:
2004
Tipo de documento:
Article