Section of Plant Physiology, University of Barcelona, Barcelona & AGROTECNIO (Center of Research in Agrotechnology), Lleida, Spain.
Agro-Technological Institute of Castilla y León (ITACyL), Valladolid, Spain.
Food Chem. 2023 Mar 15;404(Pt A):134565. doi: 10.1016/j.foodchem.2022.134565. Epub 2022 Oct 12.
The aim of this study was to test the hypothesis that genetic variability is the key driver of mineral concentration in wheat grain in Mediterranean conditions. We grew 12 modern winter wheat varieties in semi-arid conditions and alkaline soils, in two consecutive years of contrasting water availability, and at three rates of N-fertilization: 64, 104, and 130 Kg N/ha. The genotype was the main driver of [Ca], [K], [Mg], and [S] in wheat grain, while the environmental conditions were more relevant for [Fe] and [Zn]. The nitrogen fertilization rate had little effect. The thousand-grain weight correlated negatively with the mineral concentration in the grain, revealing the importance of grain shape. CH-Nara grains were highly nutritious making this variety a potential source of germplasm. The knowledge gained from this study will guide future breeding and agronomic practices and guarantee food safety in the region in the advent of climate change.
本研究旨在验证以下假设，即遗传变异性是在地中海条件下影响小麦籽粒中矿物质浓度的关键因素。我们在两年的时间里，在半干旱条件和碱性土壤中，以三种氮肥施用量（64、104 和 130 公斤/公顷），种植了 12 个现代冬小麦品种，这些品种的水分可利用性存在差异。基因型是影响小麦籽粒中[Ca]、[K]、[Mg]和[S]的主要因素，而环境条件对[Fe]和[Zn]的影响更为显著。氮肥施用量的影响较小。千粒重与籽粒中矿物质浓度呈负相关，这表明了粒形的重要性。CH-Nara 品种的谷物营养丰富，是该地区未来可能的种质来源。本研究获得的知识将指导未来的育种和农业实践，并确保该地区在气候变化背景下的食品安全。
