世界高粱种植面积约5183万公顷,是五种最重要的禾谷类作物之一。高粱主要种植区域位于热带干旱半干旱地区,水分亏缺是限制高粱生产的主要因素之一,甚至在降雨量较多的地区,其间隙干旱也能使高粱产量减少。近年来,由于干旱在世界一些地区日趋严重,因此,干旱问题和作物抗旱性改良受到各 About 51.83 million hectares of world sorghum are planted, one of the five most important cereal crops. The main areas where sorghum is grown are located in tropical arid and semi-arid regions. Water deficit is one of the major constraints on sorghum production, and its gap drought can reduce sorghum production even in areas with heavy rainfall. In recent years, as drought has become more serious in some parts of the world, drought and crop drought resistance have been affected by