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Glyphosate resistance in perennial ryegrass (Lolium perenne L.) is associated with a fitness penalty

Abstract
The net selection effect of herbicides on herbicide-resistance traits in weeds is conditioned by the fitness benefits and costs associated with resistance alleles. Fitness costs play an important evolutionary role preventing the fixation of adaptive alleles and contributing to the maintenance of genetic polymorphisms within populations. Glyphosate is widely used in world agriculture, which has led to the evolution of widespread glyphosate resistance in [ver mas...]
The net selection effect of herbicides on herbicide-resistance traits in weeds is conditioned by the fitness benefits and costs associated with resistance alleles. Fitness costs play an important evolutionary role preventing the fixation of adaptive alleles and contributing to the maintenance of genetic polymorphisms within populations. Glyphosate is widely used in world agriculture, which has led to the evolution of widespread glyphosate resistance in many weed species. The fitness of glyphosate-resistant and -susceptible perennial ryegrass plants selected from within a single population were studied in two field experiments conducted during 2011 and 2012 under different soil water availability. Glyphosate-resistant plants showed a reduction in height of 12 and 16%, leaf blade area of 16 and 33%, shoot biomass of 45 and 55%, seed number of 33 and 53%, and total seed mass of 16 and 5% compared to glyphosate-susceptible plants in 2011 and 2012, respectively. The reduction in seed number per plant resulted in a 40% fitness cost associated with the glyphosate-resistance trait in perennial ryegrass. Fitness costs of glyphosate-resistant plants were expressed under both conditions of water availability. These results could be useful for designing management strategies and exploiting the reduced glyphosate-resistant perennial ryegrass fitness in the absence of glyphosate selection. [Cerrar]
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Author
Yanniccari, Marcos Ezequiel;   Vila-Aiub, Martín Miguel;   Istilart, Carolina Maria;   Acciaresi, Horacio Abel;   Castro, Ana Maria;  
Fuente
Weed Science 64 (1) : 71-79
Date
2016
ISSN
0043-1745 (Print)
1550-2759 (Online)
URI
http://hdl.handle.net/20.500.12123/923
https://www.cambridge.org/core/journals/weed-science/article/glyphosate-resistance-in-perennial-ryegrass-lolium-perenne-l-is-associated-with-a-fitness-penalty/0DEBC9E192DB35AC09B9BC19C77B7B27
DOI
https://doi.org/10.1614/WS-D-15-00065.1
Formato
pdf
Tipo de documento
article
Palabras Claves
Malezas; Weeds; Glifosato; Glyphosate; Lolium perenne; Resistencia a los Herbicidas; Resistance to Herbicides; Raigrás perenne;
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Excepto donde se diga explicitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
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