Evaluation of the impact of heat on wheat dormancy, late maturity α-amylase and grain size under controlled conditions in diverse germplasm.
Evaluation of the impact of heat on wheat dormancy, late maturity α-amylase and grain size under controlled conditions in diverse germplasm.
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DOI：
10.1038/s41598-020-73707-8
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发表时间：
2020-10-20
影响因子：
4.6
通讯作者：
Ral JF
中科院分区：
文献类型：
--
作者：
Barrero JM;Porfirio L;Hughes T;Chen J;Dillon S;Gubler F;Ral JF
在澳大利亚小麦种植带，灌浆期间的短暂高温或炎热天气变得越来越普遍，对产量和质量产生巨大影响，每年造成数十亿美元的损失。在预测极端温度增加的气候变化情景下，这个问题将反复出现，但到目前为止，尚未在不同的遗传背景下对热期抗性进行系统分析。我们开发了一个方案来研究热对三个重要性状的影响：籽粒大小，籽粒休眠和晚熟α-淀粉酶（LMA）的存在，我们通过分析28个遗传多样性小麦地方品种的表型和探索热响应中存在的潜在变异来验证它。使用受控的生长环境，使不同的基因型在我们的标准条件下生长直到开花后20天，然后移入加热室中10天。我们的研究表明，灌浆中后期的高温处理对产量和品质产生了多重不利影响。我们观察到在大多数测试的基因型中，颗粒大小减小，颗粒休眠减少和LMA表达增加，但是对于每个分析的性状，鉴定了潜在的抗性品系，为未来的遗传研究和热不敏感商业品系的育种开辟了新的前景。
In the Australian wheat belts, short episodes of high temperatures or hot spells during grain filling are becoming increasingly common and have an enormous impact on yield and quality, bringing multi-billion losses annually. This problem will become recurrent under the climate change scenario that forecast increasing extreme temperatures, but so far, no systematic analysis of the resistance to hot spells has yet been performed in a diverse genetic background. We developed a protocol to study the effects of heat on three important traits: grain size, grain dormancy and the presence of Late Maturity α-Amylase (LMA), and we validated it by analysing the phenotypes of 28 genetically diverse wheat landraces and exploring the potential variability existing in the responses to hot spells. Using controlled growth environments, the different genotypes were grown in our standard conditions until 20 days after anthesis, and then moved for 10 days into a heat chamber. Our study showed that our elevated temperature treatment during mid-late filling triggered multiple detrimental effects on yield and quality. We observed a reduction in grain size, a reduction in grain dormancy and increased LMA expression in most of the tested genotypes, but potential resistant lines were identified for each analyzed trait opening new perspectives for future genetic studies and breeding for heat-insensitive commercial lines.
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影响因子：
11.6
作者：
Hochman, Zvi;Gobbett, David L.;Horan, Heidi
通讯作者：
Horan, Heidi
影响因子：
5.8
作者：
Biddulph, T. B.;Plummer, J. A.;Mares, D. J.
通讯作者：
Mares, D. J.
影响因子：
--
作者：
BLUMENTHAL, CS;BATEY, IL;BARLOW, EWR
通讯作者：
BARLOW, EWR
DOI：
10.1073/pnas.0701890104
发表时间：
2007-12-11
影响因子：
11.1
作者：
Howden, S. Mark;Soussana, Jean-Francois;Meinke, Holger
通讯作者：
Meinke, Holger
影响因子：
12.3
作者：
Barrero JM;Cavanagh C;Verbyla KL;Tibbits JF;Verbyla AP;Huang BE;Rosewarne GM;Stephen S;Wang P;Whan A;Rigault P;Hayden MJ;Gubler F
通讯作者：
Gubler F