State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China.
Crop Research Institute, Shandong Academy of Agricultural Sciences / National Engineering Research Center for Wheat & Maize / Key Laboratory of Wheat Biology and Genetic Improvement in North Yellow & Huai River Valley, Ministry of Agriculture / Shandong Provincial Technology Innovation Center for Wheat, Jinan 250100, China.
Food Res Int. 2022 Oct;160:111748. doi: 10.1016/j.foodres.2022.111748. Epub 2022 Jul 28.
The quality traits of wheat grain ultimately determine the performance of wheat flour and dough, which is crucial to end-products. However, to combine high yield and good grain quality has been a great challenge in wheat breeding. In this study, the different sized A- and B-type starch granules were fractioned to investigate their effects on the physicochemical properties of wheat flour and rheological properties of wheat dough using three substitution levels (5, 10, and 15%). Results showed that 5% B-type starch granules addition increased the percentage of SDS-unextractable polymeric protein, optimized the dough network, and increased the bond water content, and thus improved the dough rheological properties. The addition of A-type starch granules or excessive B-type starch granules diluted and destroyed the structure of gluten, and reduced the dough strength. Therefore, a possible strategy for combining wheat quality and yield was proposed, that is, replacing protein content with B-type starch granules at a proper level, which has profound implications for wheat breeders to look at and address trade-offs between the quality and yield of wheat in future.
小麦籽粒的品质特性最终决定了面粉和面团的性能，这对最终产品至关重要。然而，在小麦育种中，将高产与良好的籽粒品质相结合一直是一个巨大的挑战。本研究采用三种替代水平（5%、10%和 15%），对不同大小的 A 型和 B 型淀粉颗粒进行分级，以研究其对面粉理化特性和面团流变学特性的影响。结果表明，添加 5%B 型淀粉颗粒增加了 SDS 不溶性聚合蛋白的百分比，优化了面团网络，并增加了结合水含量，从而改善了面团流变学特性。添加 A 型淀粉颗粒或过量的 B 型淀粉颗粒会稀释和破坏面筋结构，降低面团强度。因此，提出了一种将小麦品质和产量相结合的可能策略，即用 B 型淀粉颗粒替代适当水平的蛋白质含量，这对小麦育种者在未来看待和解决小麦品质和产量之间的权衡关系具有深远意义。
