通过增加短生长期水稻发穗前每穗非结构性碳水化合物储备来提高粒重和产量稳定性

IF 6 1区 农林科学 Q1 AGRONOMY
Xing Li , Ruichun Zhang , Ge Chen , Jiaxin Xie , Zhengwu Xiao , Fangbo Cao , Izhar Ali , Anas Iqbal , Abdul Wahab , Min Huang , Jiana Chen
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引用次数: 0

摘要

水稻稳产是育种的目标之一,尤其是短生育期水稻,但其潜在机制仍不清楚。为了确定短生育期水稻产量稳定性与源汇特征之间的关系,2021 年和 2022 年在三个地点(岳阳、浏阳和衡阳)进行了田间试验。本研究比较了中稻 39 号(Z-39)和酃优 268 号(L-268)这两个稳产短生育期水稻品种与中稻 17 号(Z-17)和株优 819 号(Z-819)这两个不稳产短生育期水稻品种的产量、产量组成、源汇特征及其稳定性。农艺参数的稳定性用变异系数(CV)表示。2021 年,Z-17、Z-819、Z-39 和 L-268 的产量变异系数分别为 10.2%、10.1%、4.5% 和 5.7%,2022 年分别为 19.7%、15.0%、5.4% 和 6.5%。2021 年,Z-17、Z-819、Z-39 和 L-268 的粒重变异系数分别为 6.3%、5.7%、3.4% 和 4.5%,2022 年分别为 8.1%、6.3%、1.5% 和 0.8%。2021 年和 2022 年,Z-819 和 Z-17 的平均每穗源容量和穗前非结构碳水化合物储备量(NSCpre)分别比 L-268 和 Z-39 低 7%-43% 和 7%-72%。在打顶阶段,L-268 和 Z-39 的叶片光系统 II 光化学平均量子产率、叶面积指数和叶片比重均高于 Z-819 和 Z-17。这项研究表明,在打顶前叶片的优良性状导致的高 NSCpre 可提高每穗源容量及其稳定性,从而提高粒重和产量的稳定性。提高NSCpre对实现短生育期水稻的粒重和产量稳定性至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Increasing grain weight and yield stability by increasing pre-heading non-structural carbohydrate reserves per spikelet in short-growth duration rice

Rice yield stability is a breeding goal, particularly for short-growth duration rice, but its underlying mechanisms remain unclear. In an attempt to identify the relationship between yield stability and source–sink characteristics in short-growth duration rice, a field experiment was conducted at three sites (Yueyang, Liuyang, and Hengyang) in 2021 and 2022. This study compared yield, yield components, source–sink characteristics, and their stability between two stable-yielding short-growth duration rice cultivars, Zhongzao 39 (Z-39) and Lingliangyou 268 (L-268), and two unstable-yielding short-growth duration rice cultivars, Zhongjiazao 17 (Z-17) and Zhuliangyou 819 (Z-819). The stability of agronomic parameters was represented by the coefficient of variation (CV). The respective CVs of yield in Z-17, Z-819, Z-39, and L-268 were 10.2%, 10.1%, 4.5%, and 5.7% in 2021 and 19.7%, 15.0%, 5.4%, and 6.5% in 2022. The respective CVs of grain weight were 6.3%, 5.7%, 3.4%, and 4.5% in Z-17, Z-819, Z-39, and L-268 in 2021, and 8.1%, 6.3%, 1.5%, and 0.8% in 2022. The mean source capacity per spikelet and pre-heading non-structural carbohydrate reserves per spikelet (NSCpre) were 7%–43% and 7%–72% lower in Z-819 and Z-17 than in L-268 and Z-39 in 2021 and 2022. The mean quantum yield of photosystem II photochemistry of leaf, leaf area index, and specific leaf weight of L-268 and Z-39 were higher than those of Z-819 and Z-17 at the heading stage. This study suggests that high NSCpre, caused by great leaf traits before heading, increases source capacity per spikelet and its stability, thereby increasing the stability of grain weight and yield. Increasing NSCpre is critical for achieving grain weight and yield stability in short-growth duration rice.

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来源期刊
Crop Journal
Crop Journal Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
9.90
自引率
3.00%
发文量
638
审稿时长
41 days
期刊介绍: The major aims of The Crop Journal are to report recent progresses in crop sciences including crop genetics, breeding, agronomy, crop physiology, germplasm resources, grain chemistry, grain storage and processing, crop management practices, crop biotechnology, and biomathematics. The regular columns of the journal are Original Research Articles, Reviews, and Research Notes. The strict peer-review procedure will guarantee the academic level and raise the reputation of the journal. The readership of the journal is for crop science researchers, students of agricultural colleges and universities, and persons with similar academic levels.
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