Estimating the yield stability of heat-tolerant rice genotypes under various heat conditions across reproductive stages: a 5-year case study.
Estimating the yield stability of heat-tolerant rice genotypes under various heat conditions across reproductive stages: a 5-year case study.
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评估耐热水稻基因型在生殖阶段不同热条件下的产量稳定性：一项为期 5 年的案例研究
DOI：
10.1038/s41598-021-93079-x
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发表时间：
2021-06-30
影响因子：
4.6
通讯作者：
Peng S
中科院分区：
文献类型：
--
作者：
Wu C;Cui K;Li Q;Li L;Wang W;Hu Q;Ding Y;Li G;Fahad S;Huang J;Nie L;Peng S
水稻生殖生长期的高温事件会导致产量损失。培育耐热品种是全球变暖背景下保障粮食安全的重要策略。大多数耐热水稻基因型是在开花期高温下鉴定的，但目前尚不清楚这些目前筛选的耐热水稻基因型在其他生殖阶段高温胁迫下是否能保持稳定的高产。以耐高温水稻品种Nagina 22和汕优63以及典型的热敏感品种两优培九为材料，研究了2010-2014年水稻在幼穗分化、开花和灌浆期热处理下的产量反应和产量稳定性。结果表明，水稻品种在不同生殖阶段对热胁迫的反应不同。Nagina 22在开花期和灌浆期最耐高温胁迫，但在幼穗分化期较敏感;汕优63在幼穗分化期和灌浆期最耐高温胁迫，在开花期耐高温胁迫能力中等。基因型和基因型-环境互作双标图分析结果表明，汕优63在3个生育期高温胁迫下表现出最高的高产稳定性，Nagina 22次之，两优培九在3个生育期高温胁迫下表现出稳定的低产。结果表明，不同水稻品种的耐热性取决于热胁迫发生的生殖阶段，其影响表现为籽粒产量和结实率的降低。今后耐热品种的培育应努力培育在任何生殖阶段都能全面耐受热胁迫的品种，以科普未来热事件的不可预测的发生。
Heat events during the reproductive stages of rice plants induce great yield losses. Cultivating heat-tolerant varieties is a promising strategy for guaranteeing grain security under global warming scenarios. Most heat-tolerant rice genotypes were identified under heat during the flowering stage, but it is unclear whether these currently screened heat-tolerant rice genotypes maintain stable high grain yields when heat stress occurs during the other reproductive stages. In the present study, two notable heat-tolerant rice cultivars, Nagina22 and Shanyou63, and one typical heat-sensitive cultivar, Liangyoupeijiu, were evaluated for their yield response and yield stability under heat treatments during the panicle initiation, flowering, and grain filling stages during 2010–2014. Our results revealed that rice cultivars respond differently to heat stress during different reproductive stages. Nagina22 was the most tolerant to heat stress during the flowering and grain filling stages but was susceptible during panicle initiation; Shanyou63 was the most tolerant to heat stress during panicle initiation and grain filling and was moderately tolerant to heat stress during the flowering stages. Genotype and genotype-by-environment interaction biplot yield analysis revealed that Shanyou63 exhibited the highest stability in high grain yield, followed by Nagina22, and Liangyoupeijiu exhibited stable low grain yield when experiencing heat stress across the three reproductive stages. Our results indicate that the heat tolerance of different rice cultivars depends on the reproductive stage during which heat stress occurs, and the effects manifest as reductions in grain yields and seed setting rates. Future efforts to develop heat-tolerant varieties should strive to breed varieties that are comprehensively tolerant to heat stress during any reproductive stage to cope with the unpredictable occurrence of future heat events.
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影响因子：
6.9
作者：
Talla SK;Panigrahy M;Kappara S;Nirosha P;Neelamraju S;Ramanan R
通讯作者：
Ramanan R
影响因子：
1.5
作者：
Cao, Y. Y.;Chen, Y. H.;Zhang, J. H.
通讯作者：
Zhang, J. H.
影响因子：
11.6
作者：
Sanchez, Berta;Rasmussen, Anton;Porter, John R.
通讯作者：
Porter, John R.
影响因子：
2.3
作者：
Dou, Zhi;Tang, She;Ding, Yanfeng
通讯作者：
Ding, Yanfeng
影响因子：
2.3
作者：
MACKILL, DJ;COFFMAN, WR;RUTGER, JN
通讯作者：
RUTGER, JN