Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China

ABSTRACT Submergence stress can greatly limit grain yield of inbred rice (Oryza sativa L.), but the effects of submergence on hybrid rice are unclear. A pot experiment was conducted to clarify the effects of submergence that happens at the vegetative growth stage on two Chinese hybrid rice cultivars...

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Autores principales:	Chen,Yutiao, Song,Jiayu, Yan,Chuan, Hong,Xiaofu
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2021
Materias:	Grain yield growth characters hybrid rice cultivar Oryza sativa rice starch viscosity submergence tolerance.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200191
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spelling	oai:scielo:S0718-583920210002001912021-05-28Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in ChinaChen,YutiaoSong,JiayuYan,ChuanHong,Xiaofu Grain yield growth characters hybrid rice cultivar Oryza sativa rice starch viscosity submergence tolerance. ABSTRACT Submergence stress can greatly limit grain yield of inbred rice (Oryza sativa L.), but the effects of submergence on hybrid rice are unclear. A pot experiment was conducted to clarify the effects of submergence that happens at the vegetative growth stage on two Chinese hybrid rice cultivars. The rice cultivars Zheyou-18, an indica-japonica hybrid, and Yliangyou-689, an indica hybrid, were planted under two treatments, submergence (43 cm depth of tap water for about 2 wk) and control (no submergence). Results showed that the grain yield of submerged ‘Yliangyou-689’ was 539.0 g m-2 in 2018 and 614.2 g m-2 in 2019; submergence significantly reduced grain yield by 49.6% and 44.2% of that of the control. The lower level of grain yield was attributed to reduced survival rate, numbers of tillers and spikelets, plant dry weight, and crop growth rate, and excessive elongation of stems due to submergence of plants. The grain yield of submerged ‘Zheyou-18’ was 466.8 g m-2 in 2018 and 376.4 g m-2 in 2019 and neither of which were significantly different from that of the control, indicating higher submergence tolerance in ‘Zheyou-18’ than in ‘Yliangyou-689’. Submergence did not affect plant N and K contents, but it reduced plant N uptake rates by 47.8% to 88.7% and it reduced K uptake rates by 53.9% to 89.5% of that of the control in these two hybrid cultivars. Furthermore, nonsignificant differences were observed in all of the parameters related to rice starch viscosity between control and submergence treatment.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.81 n.2 20212021-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200191en10.4067/S0718-58392021000200191
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Grain yield growth characters hybrid rice cultivar Oryza sativa rice starch viscosity submergence tolerance.
spellingShingle	Grain yield growth characters hybrid rice cultivar Oryza sativa rice starch viscosity submergence tolerance. Chen,Yutiao Song,Jiayu Yan,Chuan Hong,Xiaofu Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China
description	ABSTRACT Submergence stress can greatly limit grain yield of inbred rice (Oryza sativa L.), but the effects of submergence on hybrid rice are unclear. A pot experiment was conducted to clarify the effects of submergence that happens at the vegetative growth stage on two Chinese hybrid rice cultivars. The rice cultivars Zheyou-18, an indica-japonica hybrid, and Yliangyou-689, an indica hybrid, were planted under two treatments, submergence (43 cm depth of tap water for about 2 wk) and control (no submergence). Results showed that the grain yield of submerged ‘Yliangyou-689’ was 539.0 g m-2 in 2018 and 614.2 g m-2 in 2019; submergence significantly reduced grain yield by 49.6% and 44.2% of that of the control. The lower level of grain yield was attributed to reduced survival rate, numbers of tillers and spikelets, plant dry weight, and crop growth rate, and excessive elongation of stems due to submergence of plants. The grain yield of submerged ‘Zheyou-18’ was 466.8 g m-2 in 2018 and 376.4 g m-2 in 2019 and neither of which were significantly different from that of the control, indicating higher submergence tolerance in ‘Zheyou-18’ than in ‘Yliangyou-689’. Submergence did not affect plant N and K contents, but it reduced plant N uptake rates by 47.8% to 88.7% and it reduced K uptake rates by 53.9% to 89.5% of that of the control in these two hybrid cultivars. Furthermore, nonsignificant differences were observed in all of the parameters related to rice starch viscosity between control and submergence treatment.
author	Chen,Yutiao Song,Jiayu Yan,Chuan Hong,Xiaofu
author_facet	Chen,Yutiao Song,Jiayu Yan,Chuan Hong,Xiaofu
author_sort	Chen,Yutiao
title	Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China
title_short	Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China
title_full	Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China
title_fullStr	Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China
title_full_unstemmed	Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China
title_sort	effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in china
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200191
work_keys_str_mv	AT chenyutiao effectsofsubmergencestressatthevegetativegrowthstageonhybridricegrowthandgrainyieldinchina AT songjiayu effectsofsubmergencestressatthevegetativegrowthstageonhybridricegrowthandgrainyieldinchina AT yanchuan effectsofsubmergencestressatthevegetativegrowthstageonhybridricegrowthandgrainyieldinchina AT hongxiaofu effectsofsubmergencestressatthevegetativegrowthstageonhybridricegrowthandgrainyieldinchina
_version_	1714205409629175808

Effects of submergence stress at the vegetative growth stage on hybrid rice growth and grain yield in China

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