Genetic architecture underlying HPPD-inhibitor resistance in a Nebraska Amaranthus tuberculatus population.
Pest Manag Sci
; 77(11): 4884-4891, 2021 Nov.
Article
em En
| MEDLINE
| ID: mdl-34272808
ABSTRACT
BACKGROUND:
Amaranthus tuberculatus is a problematic weed species in Midwest USA agricultural systems. Inhibitors of 4-hydroxyphenylpyruvate dioxygenase (HPPD) are an important chemistry for weed management in numerous cropping systems. Here, we characterize the genetic architecture underlying the HPPD-inhibitor resistance trait in an A. tuberculatus population (NEB).RESULTS:
Dose-response studies of an F1 generation identified HPPD-inhibitor resistance as a dominant trait with a resistance factor of 15.0-21.1 based on dose required for 50% growth reduction. Segregation analysis in a pseudo-F2 generation determined the trait is moderately heritable (H2 = 0.556) and complex. Bulk segregant analysis and validation with molecular markers identified two quantitative trait loci (QTL), one on each of Scaffold 4 and 12.CONCLUSIONS:
Resistance to HPPD inhibitors is a complex, largely dominant trait within the NEB population. Two large-effect QTL were identified controlling HPPD-inhibitor resistance in A. tuberculatus. This is the first QTL mapping study to characterize herbicide resistance in a weedy species.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Amaranthus
/
Herbicidas
/
4-Hidroxifenilpiruvato Dioxigenase
Tipo de estudo:
Prognostic_studies
País/Região como assunto:
America do norte
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article