当年生产的不育系经越夏储藏,成为陈种子。随着收获后时间的延长,种子开始劣变。闲此,利用不育系陈种时要谨慎处理。 1 不晒种。以往的习惯作法,不育系在浸种前要晒二三个太阳,以为这样可以打破休眠,提高发芽势和发芽率。但近年通过试验,效果并非如此。浸种前晒种,种子生活力和活力都会降低。特别是本来活力就差的陈种子,晒后发芽率明显降低。主要原因是陈种在过分干燥的情况下,膜结构和生物大分子受到一定程度的破坏,又因内外颖闭合不严,后天保持性能差,在阳光下暴晒,细胞膜和细胞器的皱缩损伤来不及修复,使物质出入失去控制,病 The production of sterile lines after the summer storage, as Chen seed. Seeds begin to deteriorate as time passes after harvest. To do this, the use of CMS Chen Chen to be cautious. 1 not sunburn. Past practices, sterile lines in the soaking two or three before the sun, thinking that this can break dormancy and improve germination potential and germination rate. However, in recent years, it has passed the test and the effect is not so good. Seed soaking before soaking, seed vitality and vitality will be reduced. In particular, Chen seeds, which were originally less viable, significantly reduced the germination rate after sun exposure. The main reason is Chen species in the case of excessive drying, the membrane structure and biological macromolecules by a certain degree of damage, due to internal and external Ying closed laxity, acquired the performance of poor, sun exposure, cell membrane and organelles shrink damage too late Repair, make the material out of control, sick