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A Rapid Method to Determine Cereal Plant Response to Glyphosate

Published online by Cambridge University Press:  20 January 2017

M. C. Escorial
Affiliation:
Departamento Proteccion Vegetal, INIA, Carretera La Coruña Km 7, Madrid 28040, Spain
H. Sixto
Affiliation:
Departamento Proteccion Vegetal, INIA, Carretera La Coruña Km 7, Madrid 28040, Spain
J. M. García-Baudín
Affiliation:
Departamento Proteccion Vegetal, INIA, Carretera La Coruña Km 7, Madrid 28040, Spain
M. C. Chueca*
Affiliation:
Departamento Proteccion Vegetal, INIA, Carretera La Coruña Km 7, Madrid 28040, Spain
*
Corresponding author's E-mail: chueca@inia.es.

Abstract

A rapid method for determining the response of cereals to glyphosate is described. This method detects the differential responses of plants in 4 d, allowing for the rapid selection of glyphosate-tolerance response. Two types of tests determined the efficacy of this rapid method: differential response to different dosages of herbicide in a coleoptile growth test and in sprayed plants. In seedling assay, barley cultivars showed a higher level of tolerance to glyphosate (the dose that causes 50% of the total effect [I50] = 0.066 and I50 = 0.060 mM) than wheat cultivars (I50 = 0.018 and I50 = 0.014 mM). The response in seedling assay is well correlated (r 2 = 0.95 and r 2 = 0.98) with the response in plant-sprayed assays. The method was employed to verify the tolerance level of a sensitive barley cultivar and the four tolerant and sensitive mutant lines derived from it.

Information

Type
Research
Copyright
Copyright © Weed Science Society of America 

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