Impacts of prolonged high temperature on heavy-panicle rice varieties in the field

ABSTRACT Although enhancement of sink capacity with heavy-panicle is an important approach to the improvement of yield potential in super rice (Oryza sativa L.) breeding, environmental fluctuations may greatly affect fertilization and grain filling of heavy-panicle rice. Here, we investigated the re...

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Autores principales:	Chen,Jianzhen, Yan,Haoliang, Mu,Qilin, Tian,Xiaohai
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2017
Materias:	Chalky grain rate grain position grain weight head milled rice rate heavy-panicle rice Oryza sativa spikelet fertility
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000200102
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spelling	oai:scielo:S0718-583920170002001022017-11-09Impacts of prolonged high temperature on heavy-panicle rice varieties in the fieldChen,JianzhenYan,HaoliangMu,QilinTian,Xiaohai Chalky grain rate grain position grain weight head milled rice rate heavy-panicle rice Oryza sativa spikelet fertility ABSTRACT Although enhancement of sink capacity with heavy-panicle is an important approach to the improvement of yield potential in super rice (Oryza sativa L.) breeding, environmental fluctuations may greatly affect fertilization and grain filling of heavy-panicle rice. Here, we investigated the response of heavy-panicle rice varieties to high temperature at flowering and grain filling stages under field conditions, with a focus on spikelets positions on the panicle. Six varieties each with four staggered sowings were grown under various climatic conditions, and thus their flowering stages and grain filling stages experienced high or normal temperature weather scenarios. When rice varieties grown under high temperature, spikelet fertilities increased in all tested varieties. Grain weights of varieties CW2221, K106 and R-2 under high temperature stress showed an average of 10.81% increase compared with normal temperature, whereas 'C418', 'J1307' and 'Xianghui210' decreased by 15.21%. Head milled rice rates significantly decreased, but chalky grain rates and chalkiness degrees significantly increased under high temperature. We further demonstrated that the effects of high temperature on spikelet fertility, grain weight and grain qualities were correlated with grain positions. These results indicate that understanding effects of high temperature on grain weight and quality in heavy-panicle rice varieties is a key factor for super rice breeding in the future.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.77 n.2 20172017-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000200102en10.4067/S0718-58392017000200102
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Chalky grain rate grain position grain weight head milled rice rate heavy-panicle rice Oryza sativa spikelet fertility
spellingShingle	Chalky grain rate grain position grain weight head milled rice rate heavy-panicle rice Oryza sativa spikelet fertility Chen,Jianzhen Yan,Haoliang Mu,Qilin Tian,Xiaohai Impacts of prolonged high temperature on heavy-panicle rice varieties in the field
description	ABSTRACT Although enhancement of sink capacity with heavy-panicle is an important approach to the improvement of yield potential in super rice (Oryza sativa L.) breeding, environmental fluctuations may greatly affect fertilization and grain filling of heavy-panicle rice. Here, we investigated the response of heavy-panicle rice varieties to high temperature at flowering and grain filling stages under field conditions, with a focus on spikelets positions on the panicle. Six varieties each with four staggered sowings were grown under various climatic conditions, and thus their flowering stages and grain filling stages experienced high or normal temperature weather scenarios. When rice varieties grown under high temperature, spikelet fertilities increased in all tested varieties. Grain weights of varieties CW2221, K106 and R-2 under high temperature stress showed an average of 10.81% increase compared with normal temperature, whereas 'C418', 'J1307' and 'Xianghui210' decreased by 15.21%. Head milled rice rates significantly decreased, but chalky grain rates and chalkiness degrees significantly increased under high temperature. We further demonstrated that the effects of high temperature on spikelet fertility, grain weight and grain qualities were correlated with grain positions. These results indicate that understanding effects of high temperature on grain weight and quality in heavy-panicle rice varieties is a key factor for super rice breeding in the future.
author	Chen,Jianzhen Yan,Haoliang Mu,Qilin Tian,Xiaohai
author_facet	Chen,Jianzhen Yan,Haoliang Mu,Qilin Tian,Xiaohai
author_sort	Chen,Jianzhen
title	Impacts of prolonged high temperature on heavy-panicle rice varieties in the field
title_short	Impacts of prolonged high temperature on heavy-panicle rice varieties in the field
title_full	Impacts of prolonged high temperature on heavy-panicle rice varieties in the field
title_fullStr	Impacts of prolonged high temperature on heavy-panicle rice varieties in the field
title_full_unstemmed	Impacts of prolonged high temperature on heavy-panicle rice varieties in the field
title_sort	impacts of prolonged high temperature on heavy-panicle rice varieties in the field
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000200102
work_keys_str_mv	AT chenjianzhen impactsofprolongedhightemperatureonheavypaniclericevarietiesinthefield AT yanhaoliang impactsofprolongedhightemperatureonheavypaniclericevarietiesinthefield AT muqilin impactsofprolongedhightemperatureonheavypaniclericevarietiesinthefield AT tianxiaohai impactsofprolongedhightemperatureonheavypaniclericevarietiesinthefield
_version_	1714205367595958272

Impacts of prolonged high temperature on heavy-panicle rice varieties in the field

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