Glyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensity

Glyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensity

BACKGROUND: A population of Echinochloa colona infesting agricultural fields in the northern region of Western Australia evolved glyphosate resistance after 10 years of glyphosate selection. This study identified two phenotypic [susceptible S versus resistant R] lines from within a segregating glyphosate - resistant population. Estimation of survival, growth and reproductive rates of the phenotypes in response to glyphosate selection helped to characterise the level of resistance, fitness and the selection intensity for glyphosate in this species. RESULTS: Estimations of LD50 [lethal dose] and GR50 [growth rate] showed an eightfold glyphosate resistance in this population. The resistant index based on the estimation of seed number [SYn50] showed a 13 - fold resistance. As a result of linear combination of plant survival and fecundity rates, plant fitness values of 0.2 and 0.8were estimated for the S and R phenotypeswhen exposed to the low dose of 270 g glyphosate ha-1. At the recommended dose of 540 g glyphosate ha-1, fitness significantly decreased [fivefold] in S plants but remained markedly similar [0.7] in plants of the R phenotype. Thus, the calculated selection intensity [SI] at 540 g glyphosate ha-1 was much greater [SI=17] than at 270 g glyphosate ha-1 [SI=4]. CONCLUSIONS: The assessment of plant survival and fecundity in response to glyphosate selection in the S and R phenotypes allowed a greater accuracy in the estimation of population fitness of both phenotypes and thus of glyphosate selection intensity in E. colona. The estimation of seed number or mass of phenotypes under herbicide selection is a true ecological measure of resistance with implications for herbicide resistance evolution.

Saved in:
Bibliographic Details
Main Authors: Goh, Sou Sheng, Vila Aiub, Martín Miguel, Busi, Roberto, Powles, Stephen B.
Format: Texto biblioteca
Language:eng
Subjects:GLYPHOSATE RESISTANCE, SELECTION INTENSITY, ECHINOCHLOA COLONA, FITNESS, FECUNDITY, ,
Online Access:http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47334
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
Tags: Add Tag
No Tags, Be the first to tag this record!
id KOHA-OAI-AGRO:47334
record_format koha
spelling KOHA-OAI-AGRO:473342023-11-10T15:10:08Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47334http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGGlyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensityGoh, Sou ShengGoh, Sou ShengVila Aiub, Martín MiguelBusi, RobertoPowles, Stephen B.textengapplication/pdfBACKGROUND: A population of Echinochloa colona infesting agricultural fields in the northern region of Western Australia evolved glyphosate resistance after 10 years of glyphosate selection. This study identified two phenotypic [susceptible S versus resistant R] lines from within a segregating glyphosate - resistant population. Estimation of survival, growth and reproductive rates of the phenotypes in response to glyphosate selection helped to characterise the level of resistance, fitness and the selection intensity for glyphosate in this species. RESULTS: Estimations of LD50 [lethal dose] and GR50 [growth rate] showed an eightfold glyphosate resistance in this population. The resistant index based on the estimation of seed number [SYn50] showed a 13 - fold resistance. As a result of linear combination of plant survival and fecundity rates, plant fitness values of 0.2 and 0.8were estimated for the S and R phenotypeswhen exposed to the low dose of 270 g glyphosate ha-1. At the recommended dose of 540 g glyphosate ha-1, fitness significantly decreased [fivefold] in S plants but remained markedly similar [0.7] in plants of the R phenotype. Thus, the calculated selection intensity [SI] at 540 g glyphosate ha-1 was much greater [SI=17] than at 270 g glyphosate ha-1 [SI=4]. CONCLUSIONS: The assessment of plant survival and fecundity in response to glyphosate selection in the S and R phenotypes allowed a greater accuracy in the estimation of population fitness of both phenotypes and thus of glyphosate selection intensity in E. colona. The estimation of seed number or mass of phenotypes under herbicide selection is a true ecological measure of resistance with implications for herbicide resistance evolution.BACKGROUND: A population of Echinochloa colona infesting agricultural fields in the northern region of Western Australia evolved glyphosate resistance after 10 years of glyphosate selection. This study identified two phenotypic [susceptible S versus resistant R] lines from within a segregating glyphosate - resistant population. Estimation of survival, growth and reproductive rates of the phenotypes in response to glyphosate selection helped to characterise the level of resistance, fitness and the selection intensity for glyphosate in this species. RESULTS: Estimations of LD50 [lethal dose] and GR50 [growth rate] showed an eightfold glyphosate resistance in this population. The resistant index based on the estimation of seed number [SYn50] showed a 13 - fold resistance. As a result of linear combination of plant survival and fecundity rates, plant fitness values of 0.2 and 0.8were estimated for the S and R phenotypeswhen exposed to the low dose of 270 g glyphosate ha-1. At the recommended dose of 540 g glyphosate ha-1, fitness significantly decreased [fivefold] in S plants but remained markedly similar [0.7] in plants of the R phenotype. Thus, the calculated selection intensity [SI] at 540 g glyphosate ha-1 was much greater [SI=17] than at 270 g glyphosate ha-1 [SI=4]. CONCLUSIONS: The assessment of plant survival and fecundity in response to glyphosate selection in the S and R phenotypes allowed a greater accuracy in the estimation of population fitness of both phenotypes and thus of glyphosate selection intensity in E. colona. The estimation of seed number or mass of phenotypes under herbicide selection is a true ecological measure of resistance with implications for herbicide resistance evolution.GLYPHOSATE RESISTANCESELECTION INTENSITYECHINOCHLOA COLONAFITNESSFECUNDITYPest Management Science
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic GLYPHOSATE RESISTANCE
SELECTION INTENSITY
ECHINOCHLOA COLONA
FITNESS
FECUNDITY

GLYPHOSATE RESISTANCE
SELECTION INTENSITY
ECHINOCHLOA COLONA
FITNESS
FECUNDITY
spellingShingle GLYPHOSATE RESISTANCE
SELECTION INTENSITY
ECHINOCHLOA COLONA
FITNESS
FECUNDITY

GLYPHOSATE RESISTANCE
SELECTION INTENSITY
ECHINOCHLOA COLONA
FITNESS
FECUNDITY
Goh, Sou Sheng
Goh, Sou Sheng
Vila Aiub, Martín Miguel
Busi, Roberto
Powles, Stephen B.
Glyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensity
description BACKGROUND: A population of Echinochloa colona infesting agricultural fields in the northern region of Western Australia evolved glyphosate resistance after 10 years of glyphosate selection. This study identified two phenotypic [susceptible S versus resistant R] lines from within a segregating glyphosate - resistant population. Estimation of survival, growth and reproductive rates of the phenotypes in response to glyphosate selection helped to characterise the level of resistance, fitness and the selection intensity for glyphosate in this species. RESULTS: Estimations of LD50 [lethal dose] and GR50 [growth rate] showed an eightfold glyphosate resistance in this population. The resistant index based on the estimation of seed number [SYn50] showed a 13 - fold resistance. As a result of linear combination of plant survival and fecundity rates, plant fitness values of 0.2 and 0.8were estimated for the S and R phenotypeswhen exposed to the low dose of 270 g glyphosate ha-1. At the recommended dose of 540 g glyphosate ha-1, fitness significantly decreased [fivefold] in S plants but remained markedly similar [0.7] in plants of the R phenotype. Thus, the calculated selection intensity [SI] at 540 g glyphosate ha-1 was much greater [SI=17] than at 270 g glyphosate ha-1 [SI=4]. CONCLUSIONS: The assessment of plant survival and fecundity in response to glyphosate selection in the S and R phenotypes allowed a greater accuracy in the estimation of population fitness of both phenotypes and thus of glyphosate selection intensity in E. colona. The estimation of seed number or mass of phenotypes under herbicide selection is a true ecological measure of resistance with implications for herbicide resistance evolution.
format Texto
topic_facet
GLYPHOSATE RESISTANCE
SELECTION INTENSITY
ECHINOCHLOA COLONA
FITNESS
FECUNDITY
author Goh, Sou Sheng
Goh, Sou Sheng
Vila Aiub, Martín Miguel
Busi, Roberto
Powles, Stephen B.
author_facet Goh, Sou Sheng
Goh, Sou Sheng
Vila Aiub, Martín Miguel
Busi, Roberto
Powles, Stephen B.
author_sort Goh, Sou Sheng
title Glyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensity
title_short Glyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensity
title_full Glyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensity
title_fullStr Glyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensity
title_full_unstemmed Glyphosate resistance in Echinochloa colona phenotypic characterisation and quantification of selection intensity
title_sort glyphosate resistance in echinochloa colona phenotypic characterisation and quantification of selection intensity
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47334
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
work_keys_str_mv AT gohsousheng glyphosateresistanceinechinochloacolonaphenotypiccharacterisationandquantificationofselectionintensity
AT gohsousheng glyphosateresistanceinechinochloacolonaphenotypiccharacterisationandquantificationofselectionintensity
AT vilaaiubmartinmiguel glyphosateresistanceinechinochloacolonaphenotypiccharacterisationandquantificationofselectionintensity
AT busiroberto glyphosateresistanceinechinochloacolonaphenotypiccharacterisationandquantificationofselectionintensity
AT powlesstephenb glyphosateresistanceinechinochloacolonaphenotypiccharacterisationandquantificationofselectionintensity
_version_ 1787218022625181696

Similar Items