Plant and Floret Growth at Distinct Developmental Stages During the Stem Elongation Phase in Wheat.
Plant and Floret Growth at Distinct Developmental Stages During the Stem Elongation Phase in Wheat.
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DOI：
10.3389/fpls.2018.00330
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发表时间：
2018
影响因子：
5.6
通讯作者：
Schnurbusch T
中科院分区：
文献类型：
--
作者：
Guo Z;Chen D;Schnurbusch T
小花发育是小麦结实的关键，但超过50%的籽粒产量潜力(基于最大小花原基数目)在茎伸长阶段(从小穗末期到开花)丧失。植物(如叶面积、株高)和小花(如花药和子房大小)的动态生长及其与籽粒产量性状(如粒数和宽度)的关系尚不清楚。在这项研究中，我们首次将SEP分成七个阶段来研究温室和大田小麦的植株(第一个实验)和小花(第二个实验)的生长。在第一次试验中，不同时期的各种植物生长性状指数在大田和温室之间基本一致，与环境无关。然而，在特定的阶段，一些特征在两种环境中显著不同。在第二个试验中，表型和基因相似性分析表明，籽粒数和大小与开花期子房大小密切相关，表明子房大小与子房大小和粒数密切相关。主成分分析表明，绿花药、黄花药、拔节期、抽穗期、开花期的前6个主成分PC分别解释了总表型变异的99.13、98.61、98.41、98.35和97.93%。第一个主成分解释的累积方差随小花生长而减小，在绿花期最大(88.8%)，开花期最低(50.09%)。早熟小麦的开花期子房大小大于晚熟小麦，花药/子房大小与花发育后期和早期籽粒数/粒大小性状关系密切。我们的发现揭示了小麦植株和小花生长相关性状的动态变化以及环境对这些性状的影响。
Floret development is critical for grain setting in wheat (Triticum aestivum), but more than 50% of grain yield potential (based on the maximum number of floret primordia) is lost during the stem elongation phase (SEP, from the terminal spikelet stage to anthesis). Dynamic plant (e.g., leaf area, plant height) and floret (e.g., anther and ovary size) growth and its connection with grain yield traits (e.g., grain number and width) are not clearly understood. In this study, for the first time, we dissected the SEP into seven stages to investigate plant (first experiment) and floret (second experiment) growth in greenhouse- and field-grown wheat. In the first experiment, the values of various plant growth trait indices at different stages were generally consistent between field and greenhouse and were independent of the environment. However, at specific stages, some traits significantly differed between the two environments. In the second experiment, phenotypic and genotypic similarity analysis revealed that grain number and size corresponded closely to ovary size at anthesis, suggesting that ovary size is strongly associated with grain number and size. Moreover, principal component analysis (PCA) showed that the top six principal components PCs explained 99.13, 98.61, 98.41, 98.35, and 97.93% of the total phenotypic variation at the green anther, yellow anther, tipping, heading, and anthesis stages, respectively. The cumulative variance explained by the first PC decreased with floret growth, with the highest value detected at the green anther stage (88.8%) and the lowest at the anthesis (50.09%). Finally, ovary size at anthesis was greater in wheat accessions with early release years than in accessions with late release years, and anther/ovary size shared closer connections with grain number/size traits at the late vs. early stages of floral development. Our findings shed light on the dynamic changes in plant and floret growth-related traits in wheat and the effects of the environment on these traits.
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影响因子：
6.9
作者：
Borràs-Gelonch G;Rebetzke GJ;Richards RA;Romagosa I
通讯作者：
Romagosa I
影响因子：
11.6
作者：
Chen, Dijun;Neumann, Kerstin;Klukas, Christian
通讯作者：
Klukas, Christian
影响因子：
3
作者：
González, FG;Slafer, GA;Miralles, DJ
通讯作者：
Miralles, DJ
影响因子：
7.4
作者：
Kebrom, Tesfamichael H.;Chandler, Peter M.;Spielmeyer, Wolfgang
通讯作者：
Spielmeyer, Wolfgang
DOI：
10.1071/pp9800169
发表时间：
1980-01-01
期刊：
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
影响因子：
--
作者：
FISCHER, RA;STOCKMAN, YM
通讯作者：
STOCKMAN, YM