Morphological characterization of Phalaris minor biotypes resistant and susceptible to ACCase inhibitor herbicides

  • José Luis Garcia-Franco Postgrado en Botánica, Colegio de Postgraduados
  • Ebandro Uscanga-Mortera Postgrado en Botánica, Colegio de Postgraduados
  • Josué Kohashi-Shibata Postgrado en Botánica, Colegio de Postgraduados
  • Antonio García-Esteva Postgrado en Botánica, Colegio de Postgraduados
  • Petra Yáñez-Jiménez Postgrado en Botánica, Colegio de Postgraduados
  • Héctor Manuel Ortega-Escobar Postgrado en Hidrociencias, Colegio de Postgraduados
keywords: graminicides, morphological characterization,, resistance to herbicide

Abstract

Phalaris minor Retz. (Little-seed Canary Grass) is considered an important weed of the wheat crop in the Mexican Bajio region, which has developed resistance to herbicides inhibitors of acetyl coenzyme A carboxylase. In some cases, it has been observed that weeds mimic the crop, as Echinochloa spp. with the rice. The aim of this study was: (1) to determine whether there are morphological differences between resistant and susceptible little-seed canary grass biotypes, and (2) to compare the morphology in vegetative stage of P. minor biotypes with the wheat. Experiments were performed in Montecillo, State of Mexico, under a greenhouse and in a non-competition condition. The resistant biotypes used were: C4, C7, Guanajuato, Jalisco, and one susceptible. Wheat cultivars used were: Cortazar and Nana. Twenty morphological variables were recorded in the vegetative phase for comparison with wheat and twenty-three variables throughout the little-seed canary grass life cycle for the comparison between biotypes. Data was analyzed using discriminant analysis, which showed a statistical separation between little-seed canary grass biotypes. Thus, it is possible that the resistance had been developed independently in the biotypes and not that resistance had been developed solely from an initial population. If they were originated from a single resistant population, biotypes are expe cted to be similar morphologically due to its genetic closeness. The discriminant analysis also showed a statistical separation between little seed canary grass biotypes and wheat cultivars, making it practical to distinguish them visually.

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Morphological characterization of <em>Phalaris minor</em> biotypes resistant and susceptible to ACCase inhibitor herbicides
Published
2014-06-15
How to Cite
Garcia-Franco, J. L., Uscanga-Mortera, E., Kohashi-Shibata, J., García-Esteva, A., Yáñez-Jiménez, P., & Ortega-Escobar, H. M. (2014). Morphological characterization of Phalaris minor biotypes resistant and susceptible to ACCase inhibitor herbicides. Botanical Sciences, 92(2), 169-176. https://doi.org/10.17129/botsci.44
Section
STRUCTURAL BOTANY / BOTÁNICA ESTRUCTURAL