Cold tolerance evaluation in Chilean rice genotypes at the germination stage

Low temperature is the most important abiotic stress affecting rice (Oryza sativa L.) yield in Chile. Rice in Chile is usually planted when the minimum air temperatures are below 12 °C. This temperature is lower than the optimum needed for normal rice germination. Therefore, the aim of this study wa...

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Autores principales:	Donoso Ñanculao,Gabriel, Paredes Cárcamo,Mario, Arbiza de los Santos,Oscar, Becerra Velásquez,Viviana
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2013
Materias:	Low temperatures coleoptile length experimental lines
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000100001
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spelling	oai:scielo:S0718-583920130001000012018-10-01Cold tolerance evaluation in Chilean rice genotypes at the germination stageDonoso Ñanculao,GabrielParedes Cárcamo,MarioArbiza de los Santos,OscarBecerra Velásquez,Viviana Low temperatures coleoptile length experimental lines Low temperature is the most important abiotic stress affecting rice (Oryza sativa L.) yield in Chile. Rice in Chile is usually planted when the minimum air temperatures are below 12 °C. This temperature is lower than the optimum needed for normal rice germination. Therefore, the aim of this study was to evaluate cold tolerance in 20 experimental lines from the Rice Breeding Program of the Instituto de Investigaciones Agropecuarias (INIA), Chile, at the germination stage. Coleoptile length reduction (CRED), coleoptile length after cold treatment (CLEN), coleoptile length recovery (CREC), and coleoptile regrowth (CREG) were evaluated at 13 °C for 4 d using ’Diamante-INIA’ as the cold-tolerant control. To find genotypes with cold tolerance (low CRED value and high CLEN, CREC, and CREG values), genotypes were ranked, a biplot of principal components, and cluster analysis were performed. No differences were found among genotypes in the ranking based on CREC value so this trait was not considered. Analysis showed that only three experimental lines had cold tolerance similar to that of ’Diamante-INIA’; all other experimental lines exhibited intermediate to low cold tolerance. These results showed low cold tolerance of some Chilean genotypes at the germination stage, thus confirming the need to evaluate the rest of the germplasm from the Rice Breeding Program.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.73 n.1 20132013-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000100001en10.4067/S0718-58392013000100001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Low temperatures coleoptile length experimental lines
spellingShingle	Low temperatures coleoptile length experimental lines Donoso Ñanculao,Gabriel Paredes Cárcamo,Mario Arbiza de los Santos,Oscar Becerra Velásquez,Viviana Cold tolerance evaluation in Chilean rice genotypes at the germination stage
description	Low temperature is the most important abiotic stress affecting rice (Oryza sativa L.) yield in Chile. Rice in Chile is usually planted when the minimum air temperatures are below 12 °C. This temperature is lower than the optimum needed for normal rice germination. Therefore, the aim of this study was to evaluate cold tolerance in 20 experimental lines from the Rice Breeding Program of the Instituto de Investigaciones Agropecuarias (INIA), Chile, at the germination stage. Coleoptile length reduction (CRED), coleoptile length after cold treatment (CLEN), coleoptile length recovery (CREC), and coleoptile regrowth (CREG) were evaluated at 13 °C for 4 d using ’Diamante-INIA’ as the cold-tolerant control. To find genotypes with cold tolerance (low CRED value and high CLEN, CREC, and CREG values), genotypes were ranked, a biplot of principal components, and cluster analysis were performed. No differences were found among genotypes in the ranking based on CREC value so this trait was not considered. Analysis showed that only three experimental lines had cold tolerance similar to that of ’Diamante-INIA’; all other experimental lines exhibited intermediate to low cold tolerance. These results showed low cold tolerance of some Chilean genotypes at the germination stage, thus confirming the need to evaluate the rest of the germplasm from the Rice Breeding Program.
author	Donoso Ñanculao,Gabriel Paredes Cárcamo,Mario Arbiza de los Santos,Oscar Becerra Velásquez,Viviana
author_facet	Donoso Ñanculao,Gabriel Paredes Cárcamo,Mario Arbiza de los Santos,Oscar Becerra Velásquez,Viviana
author_sort	Donoso Ñanculao,Gabriel
title	Cold tolerance evaluation in Chilean rice genotypes at the germination stage
title_short	Cold tolerance evaluation in Chilean rice genotypes at the germination stage
title_full	Cold tolerance evaluation in Chilean rice genotypes at the germination stage
title_fullStr	Cold tolerance evaluation in Chilean rice genotypes at the germination stage
title_full_unstemmed	Cold tolerance evaluation in Chilean rice genotypes at the germination stage
title_sort	cold tolerance evaluation in chilean rice genotypes at the germination stage
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000100001
work_keys_str_mv	AT donosonanculaogabriel coldtoleranceevaluationinchileanricegenotypesatthegerminationstage AT paredescarcamomario coldtoleranceevaluationinchileanricegenotypesatthegerminationstage AT arbizadelossantososcar coldtoleranceevaluationinchileanricegenotypesatthegerminationstage AT becerravelasquezviviana coldtoleranceevaluationinchileanricegenotypesatthegerminationstage
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Cold tolerance evaluation in Chilean rice genotypes at the germination stage

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