Li Min, Feng Jiming, Zhou Han, Najeeb Ullah, Li Jincai, Song Youhong, Zhu Yulei
National Engineering Laboratory of Crop Stress Resistance Breeding, School of Agronomy, Anhui Agricultural University, Hefei, China.
Faculty of Science, Universiti Brunei Darussalam, Bandar Seri Begawan, Brunei.
Front Plant Sci. 2022 May 13;13:881813. doi: 10.3389/fpls.2022.881813. eCollection 2022.
The reproductive compromise under heat stress is a major obstacle to achieve high grain yield and quality in wheat worldwide. Securing reproductive success is the key solution to sustain wheat productivity by understanding the physiological mechanism and molecular basis in conferring heat tolerance and utilizing the candidate gene resources for breeding. In this study, we examined the performance on both carbon supply source (as leaf photosynthetic rate) and carbon sink intake (as grain yields and quality) in wheat under heat stress varying with timing, duration, and intensity, and we further surveyed physiological processes from source to sink and the associated genetic basis in regulating reproductive thermotolerance; in addition, we summarized the quantitative trait loci (QTLs) and genes identified for heat stress tolerance associated with reproductive stages. Discovery of novel genes for thermotolerance is made more efficient the combination of transcriptomics, proteomics, metabolomics, and phenomics. Gene editing of specific genes for novel varieties governing heat tolerance is also discussed.
热胁迫下的生殖损伤是全球小麦实现高产和优质的主要障碍。确保生殖成功是通过了解赋予耐热性的生理机制和分子基础以及利用候选基因资源进行育种来维持小麦生产力的关键解决方案。在本研究中，我们研究了热胁迫下小麦碳供应源（如叶片光合速率）和碳汇吸收（如籽粒产量和品质）随时间、持续时间和强度变化的表现，进一步探究了从源到库的生理过程以及调控生殖耐热性的相关遗传基础；此外，我们总结了已鉴定出的与生殖阶段耐热性相关的数量性状位点（QTL）和基因。通过转录组学、蛋白质组学、代谢组学和表型组学的结合，能够更高效地发现新的耐热基因。本文还讨论了针对控制耐热性的新变种进行特定基因的编辑。
