Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina

Rice grain discoloration affects grain yield and quality. Corrientes is the main rice producing province in Argentina. Previous studies were carried out in this province, where only panicle incidence (PI) was evaluated. In view of the need to obtain more agronomic parameters to more exhaustively inv...

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Detalles Bibliográficos
Autores principales: Dirchwolf, Pamela Maia, Gutiérrez, Susana Alejandra, Carmona, Marcelo Aníbal
Formato: Artículo
Lenguaje:Inglés
Publicado: Grupo Paulista de Fitopatologia 2023
Materias:
Oryza sativa
Grain discoloration
Weight loss
Severity
Sterility
Manchas de grãos
Perda de peso
Severidade
Eesterilidade
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/51666
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-51666
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spelling I48-R184-123456789-516662023-06-12T23:05:23Z Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina Dirchwolf, Pamela Maia Gutiérrez, Susana Alejandra Carmona, Marcelo Aníbal Oryza sativa Grain discoloration Weight loss Severity Sterility Manchas de grãos Perda de peso Severidade Eesterilidade Rice grain discoloration affects grain yield and quality. Corrientes is the main rice producing province in Argentina. Previous studies were carried out in this province, where only panicle incidence (PI) was evaluated. In view of the need to obtain more agronomic parameters to more exhaustively investigate the effects caused by this disease, the present study was carried out to evaluate panicle incidence (PI), percentage of discolored grains per panicle (GD), weight loss (WL), disease severity index (DSI) and sterility (S) in eight rice genotypes. Although PI and GD are estimated as disease incidence, both were significantly different. GD is obtained by the grain-by-grain evaluation, while PI considers a panicle diseased when the latter presents at least one spotted grain; thus, this last method overestimates the disease incidence. The genotype IRGA 424 recorded maximum and minimum GD and S values, which may be explained by different sowing dates in different regions in the province, with their corresponding environmental conditions during the critical period of the infection and during spikelet formation. WL and DSI had lower values than those reported by other authors, which indicates that the effects of rice grain discoloration on these parameters in Corrientes Province, Argentina, are less severe than in other rice cultivating countries. Manchas de grãos de arroz afeta o rendimento e qualidade do grão. A província de Corrientes é o principal produtor de arroz da Argentina. Estudos anteriores foram realizados nesta província, onde apenas a incidência de panícula (PI) foi avaliada. Tendo em vista a necessidade de obter mais parâmetros agronômicos para investigar de forma mais exaustiva os efeitos causados por esta doença, o presente estudo foi realizado onde o por cento de panículas doentes (PI), a percentagem de grãos manchados por panícula (GD), a redução de peso (WL), a severidade (DSI) e a esterilidade (S) foram avaliadas em oito genótipos de arroz. Embora o PI e o GD sejam estimados como incidência de doença, ambos foram significativamente diferentes. GD é obtido pela avaliação grão por grão, enquanto PI considera uma panícula como doente quando apresentou pelo menos um grão manchado, então esse último método está superestimando a incidência da doença. O genótipo IRGA 424 registrou valores máximos e mínimos de GD e S, o que pode ser explicado por diferentes datas de semeadura em diferentes regiões da província, com as respectivas condições ambientais durante o período crítico da infecção da doença e também durante a formação de espetáculos. WL e DSI registraram valores mais baixos do que os relatados por outros autores, o que nos faz inferir que os efeitos da descoloração do grão de arroz nesses parâmetros na província de Corrientes, na Argentina, são menos severos do que em outros países cultivados com arroz. 2023-06-12T11:40:03Z 2023-06-12T11:40:03Z 2018 Artículo Dirchwolf, Pamela Maia, Gutiérrez, Susana Alejandra y Carmona, Marcelo Aníbal, 2018. Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina. Summa Phytopathologica. Botucatu: Grupo Paulista de Fitopatologia, vol. 44, no. 3, p. 271-273. E-ISSN 1980-5454. 0100-5405 http://repositorio.unne.edu.ar/handle/123456789/51666 eng 10.1590/0100-5405/178172 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 271-273 application/pdf Grupo Paulista de Fitopatologia Summa Phytopathologica, 2018, vol. 44, no. 3, p. 271-273.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Oryza sativa
Grain discoloration
Weight loss
Severity
Sterility
Manchas de grãos
Perda de peso
Severidade
Eesterilidade
spellingShingle Oryza sativa
Grain discoloration
Weight loss
Severity
Sterility
Manchas de grãos
Perda de peso
Severidade
Eesterilidade
Dirchwolf, Pamela Maia
Gutiérrez, Susana Alejandra
Carmona, Marcelo Aníbal
Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina
topic_facet Oryza sativa
Grain discoloration
Weight loss
Severity
Sterility
Manchas de grãos
Perda de peso
Severidade
Eesterilidade
description Rice grain discoloration affects grain yield and quality. Corrientes is the main rice producing province in Argentina. Previous studies were carried out in this province, where only panicle incidence (PI) was evaluated. In view of the need to obtain more agronomic parameters to more exhaustively investigate the effects caused by this disease, the present study was carried out to evaluate panicle incidence (PI), percentage of discolored grains per panicle (GD), weight loss (WL), disease severity index (DSI) and sterility (S) in eight rice genotypes. Although PI and GD are estimated as disease incidence, both were significantly different. GD is obtained by the grain-by-grain evaluation, while PI considers a panicle diseased when the latter presents at least one spotted grain; thus, this last method overestimates the disease incidence. The genotype IRGA 424 recorded maximum and minimum GD and S values, which may be explained by different sowing dates in different regions in the province, with their corresponding environmental conditions during the critical period of the infection and during spikelet formation. WL and DSI had lower values than those reported by other authors, which indicates that the effects of rice grain discoloration on these parameters in Corrientes Province, Argentina, are less severe than in other rice cultivating countries.
format Artículo
author Dirchwolf, Pamela Maia
Gutiérrez, Susana Alejandra
Carmona, Marcelo Aníbal
author_facet Dirchwolf, Pamela Maia
Gutiérrez, Susana Alejandra
Carmona, Marcelo Aníbal
author_sort Dirchwolf, Pamela Maia
title Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina
title_short Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina
title_full Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina
title_fullStr Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina
title_full_unstemmed Assessment of grain discoloration in the main rice genotypes of Corrientes province, Argentina
title_sort assessment of grain discoloration in the main rice genotypes of corrientes province, argentina
publisher Grupo Paulista de Fitopatologia
publishDate 2023
url http://repositorio.unne.edu.ar/handle/123456789/51666
work_keys_str_mv AT dirchwolfpamelamaia assessmentofgraindiscolorationinthemainricegenotypesofcorrientesprovinceargentina
AT gutierrezsusanaalejandra assessmentofgraindiscolorationinthemainricegenotypesofcorrientesprovinceargentina
AT carmonamarceloanibal assessmentofgraindiscolorationinthemainricegenotypesofcorrientesprovinceargentina
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