Genetic control of a cytochrome P450 metabolism - based herbicide resistance mechanism in Lolium rigidum

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The dynamics of herbicide resistance evolution in plants are influenced by many factors, especially the biochemical and genetic basis of resistance. Herbicide resistance can be endowed by enhanced rates of herbicide metabolism because of the activity of cytochrome P450 enzymes, although in weedy pla...

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Detalles Bibliográficos
Autor principal: Busi, Roberto
Otros Autores: Vila Aiub, Martín Miguel, Powles, Stephen B.
Formato: Artículo
Lenguaje:Español
Materias:
ADDITIVE GENES
DOMINANCE
HERBICIDE RESISTANCE
INHERITANCE
MENDELIAN SEGREGATION
POLYGENIC RESISTANCE
CHLORSULFURON
CYTOCHROME P450
DICHLORFOP-METHYL
DICLOFOP METHYL
DIPHENYL ETHER DERIVATIVE
SULFONAMIDE
TRIAZINE DERIVATIVE
BIOACCUMULATION
BIOCHEMICAL COMPOSITION
BIOTYPE
DISEASE RESISTANCE
ENVIRONMENTAL FACTOR
ENZYME ACTIVITY
GENE EXPRESSION
GENETIC ANALYSIS
GRASS
HERBICIDE
HERITABILITY
METABOLISM
OUTCROSSING
PESTICIDE RESISTANCE
PHENOTYPE
WEED CONTROL
BIOLOGICAL MODEL
CROSS BREEDING
DOMINANT GENE
DOSE RESPONSE
DRUG EFFECT
EVOLUTION
GENETICS
LOLIUM
BIOLOGICAL EVOLUTION
CROSSES, GENETIC
CYTOCHROME P-450 ENZYME SYSTEM
DOSE-RESPONSE RELATIONSHIP, DRUG
GENES, DOMINANT
HALOGENATED DIPHENYL ETHERS
SULFONAMIDES
TRIAZINES
LOLIUM RIGIDUM
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2011Busi.pdf
LINK AL EDITOR.
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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520 |a The dynamics of herbicide resistance evolution in plants are influenced by many factors, especially the biochemical and genetic basis of resistance. Herbicide resistance can be endowed by enhanced rates of herbicide metabolism because of the activity of cytochrome P450 enzymes, although in weedy plants the genetic control of cytochrome P450-endowed herbicide resistance is poorly understood. In this study we have examined the genetic control of P450 metabolism-based herbicide resistance in a well-characterized Lolium rigidum biotype. The phenotypic resistance segregation in herbicide resistant and susceptible parents, F1, F2 and backcross [BC] families was analyzed as plant survival following treatment with the chemically unrelated herbicides diclofop-methyl or chlorsulfuron. Dominance and nuclear gene inheritance was observed in F1 families when treated at the recommended field doses of both herbicides. The segregation values of P450 herbicide resistance phenotypic traits observed in F2 and BC families was consistent with resistance endowed by two additive genes in most cases. In obligate out-crossing species such as L. rigidum, herbicide selection can easily result in accumulation of resistance genes within individuals. 
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