Zhai Shanshan, Zhang Runqi, Meng Xinhao, Liu Dan, Wang Wenxi, Yu Jiazheng, Xie Chaojie, Ma Jun, Ni Zhongfu, Sun Qixin, Li Baoyun
College of Agronomy and Biotechnology, China Agricultural University, Beijing, China.
Tianjin Key Laboratory of Crop Genetics and Breeding, Institute of Crop Sciences, Tianjin Academy of Agricultural Sciences, Tianjin, China.
Front Plant Sci. 2024 Jul 22;15:1449826. doi: 10.3389/fpls.2024.1449826. eCollection 2024.
Grain albumin is highly nutritious and closely related to the processing quality of wheat. However, few studies have explored the grain albumin content (GAC) in wheat. This study aims to uncover quantitative trait loci (QTLs) linked to wheat GAC by analyzing a doubled haploid (DH) population derived from common wheat cultivars ShanNong23 and ZhouMai17. We detected six QTLs controlling GAC on chromosomes 1B, 5A, and 6D, with individual QTL explaining 5.78% to 22.29% of the GAC variation. The effect of on GAC is attributed to the presence of the 1BL/1RS translocation, indicating that the 1BL/1RS translocation increase of GAC compared with the non-1BL/1RS translocation lines. The higher GAC observed in 1BL/1RS lines could be primarily attributed to the increased accumulation of omega-secalin, omega-gliadin, low molecular weight glutenin subunit and ribosomal protein content. Additionally, we also found that the SDS-sedimentation value of whole wheat flour was decreased by adding albumin solution. These results advance our understanding of the genetic basis of GAC and offer novel perspectives for enhancing wheat quality through genetic enhancements.
谷蛋白营养丰富，且与小麦的加工品质密切相关。然而，对小麦谷蛋白含量（GAC）的研究较少。本研究旨在通过分析普通小麦品种山农23和周麦17构建的加倍单倍体（DH）群体，揭示与小麦GAC相关的数量性状位点（QTL）。我们在1B、5A和6D染色体上检测到6个控制GAC的QTL，单个QTL对GAC变异的解释率为5.78%至22.29%。 对GAC的影响归因于1BL/1RS易位的存在，表明1BL/1RS易位系的GAC高于非1BL/1RS易位系。1BL/1RS系中观察到的较高GAC可能主要归因于ω-黑麦碱、ω-醇溶蛋白、低分子量谷蛋白亚基和核糖体蛋白含量的增加。此外，我们还发现添加白蛋白溶液会降低全麦粉的SDS沉降值。这些结果加深了我们对GAC遗传基础的理解，并为通过基因改良提高小麦品质提供了新的视角。
