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作物抗旱育种十分重要,因为水是限制世界陆地大部分地区作物生长的主要因素。据统计,有36％的陆地面积属于干燥和半干燥地区,其他64％地区在作物生长季节也会遭到暂时干旱。一、亲本选择和F_1、F_2代处理许多研究表明,植物的生理功能在一定条件下决定着作物的产量。作物品种在不同条件下的水分和光合作用的效应是不同的,因此育种工作者在灌溉条件下进行产量试验,用这种方法可以加强单个基因性状的累加。但是在干旱情况下,要获得高产量的基因组合是不太可能的,在适宜湿度下获得高产的小麦品种,在干旱条件下多数产量降低,即使适应性广的品种,产量也不过是等于甚至低于一般品种。植物适应性是许多生理过程的一种精细平衡。
Crop drought resistance breeding is important because water is a major factor limiting crop growth in most parts of the world’s land. According to statistics, 36% of the land area belongs to the dry and semi-dry areas, while 64% of the other areas also suffer temporary droughts during the crop growing season. First, the parental selection and F_1, F_2 generation processing Many studies show that the physiological functions of plants under certain conditions determine the crop yield. Crops have different effects of water and photosynthesis under different conditions, so breeders are experimenting with yield under irrigation conditions and this method can enhance the accumulation of individual gene traits. However, in drought situations, it is not possible to obtain a high-yielding genomic combination. High-yielding wheat varieties are obtained under suitable humidity and most of the yield is reduced under drought conditions. Even well-adapted varieties produce just as much or even as much Lower than the average breed. Plant adaptability is a fine balance of many physiological processes.