We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Migration by seed dispersal of ACCase-inhibitor-resistant Avena fatua in north-western Mexico.
- Authors
Tafoya‐Razo, J Antonio; Núñez‐Farfán, Juan; Torres‐García, Jesús R
- Abstract
BACKGROUND Biotypes of Avena fatua resistant to ACCase-inhibiting herbicides have been reported in the States of Baja California ( BC) and Sonora ( SON), Mexico. We hypothesised that resistant biotypes present in SON (Valle de Hermosillo and Valle del Yaqui) are derived from a resistant population from BC (Valle de Mexicali) via gene flow through the transport and exchange of contaminated wheat seed. This study aimed to determine (1) the resistance of A. fatua to ACCase-inhibiting herbicides in populations from BC and SON, (2) the mutation at the site of action and (3) the genetic structure and gene flow among populations. RESULTS DNA sequencing showed that all biotypes shared the same mutation (Leu × Ile at codon 1781). Microsatellites showed evidence of a genetic bottleneck in SON, and spatial analysis of molecular variance grouped one biotype from the Valle de Mexicali with two biotypes from the Valle de Hermosillo. Migration analysis suggested gene flow from the Valle de Mexicali to the Valle de Hermosillo, but not to the Valle del Yaqui. CONCLUSIONS The presence of resistant biotypes of A. fatua in the Valle de Hermosillo, SON, are likely derived from seeds from BC, possibly through the transport of contaminated wheat seeds. © 2016 Society of Chemical Industry
- Subjects
MEXICO; WILD oat; SEED dispersal; HERBICIDE resistance; GENE flow in plants; PEST control
- Publication
Pest Management Science, 2017, Vol 73, Issue 1, p167
- ISSN
1526-498X
- Publication type
Article
- DOI
10.1002/ps.4282