Wan Wenting, Wu Ying, Hu Die, Ye Fan, Wu Xiaopeng, Qi Xingyue, Liang Hangyu, Zhou Haiyang, Xue Jiquan, Xu Shutu, Zhang Xinghua
Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture and Rural Affairs, College of Agronomy, Northwest A&F University, Yangling, 712100 Shaanxi China.
Maize Engineering Technology Research Centre, Yangling, 712100 Shaanxi China.
Mol Breed. 2023 Mar 8;43(3):18. doi: 10.1007/s11032-023-01360-w. eCollection 2023 Mar.
As one of the three staple crops, nutritional traits in maize are important for human and animal nutrition. Grain quality-related traits are closely related to grain commercial value. Understanding the genetic basis of quality-related traits in maize would be helpful for breeding high-quality maize varieties. In this study, two association panels (AM122 and AM180) were subjected to genome-wide association analysis of grain quality-related traits, including protein content, oil content, starch content, and fiber content. In total, 98 SNPs ( < 1 × 10) were identified to be significantly associated with these four grain quality-related traits. By integrating two sets of public transcriptome data, 31 genes located in 200 kb regions flanking the associated SNP showed high expression during kernel development and were differentially expressed in two maize inbred lines, KA225 and KB035, with significantly different quality. These genes might regulate maize grain quality by participating in plant hormone processes, autophagy processes, and others. All these results could provide important reference information for breeding high‑quality maize varieties.
The online version contains supplementary material available at 10.1007/s11032-023-01360-w.
作为三大主要作物之一，玉米的营养特性对人类和动物营养至关重要。与籽粒品质相关的性状与籽粒商业价值密切相关。了解玉米品质相关性状的遗传基础将有助于培育高品质玉米品种。在本研究中，对两个关联群体（AM122和AM180）进行了籽粒品质相关性状的全基因组关联分析，这些性状包括蛋白质含量、油含量、淀粉含量和纤维含量。总共鉴定出98个单核苷酸多态性位点（<1×10）与这四个籽粒品质相关性状显著相关。通过整合两组公共转录组数据，位于关联单核苷酸多态性位点侧翼200 kb区域内的31个基因在籽粒发育过程中表现出高表达，并且在两个品质差异显著的玉米自交系KA225和KB035中差异表达。这些基因可能通过参与植物激素过程、自噬过程等调控玉米籽粒品质。所有这些结果可为培育高品质玉米品种提供重要参考信息。
在线版本包含可在10.1007/s11032-023-01360-w获取的补充材料。
