【摘要】 干旱是当今乃至未来玉米生产的第一限制因素,进行玉米抗旱育种十分必要。在总结玉米抗旱育种常规方法的基础上,重点就抗旱育种的关键技术一干旱管理和第二性征选育以及选择指数在抗旱育种中的运用进行了具体阐述。干旱处理的时间、强度及一致性是干旱管理的关键因素;产量、每株穗数、雌雄花期间隔、叶片衰老率、雄穗大小、叶片卷曲度为有效的抗旱选育常用的第二性征。更多还原

【Abstract】 Drought is the main constraint for maize production. So it is very necessary to breed maize for drought resistance. The paper indicated the main breeding methods for drought resistance and focused to introduce the experiences of CIMYYT on stress management and the use of secondary traits and selection indices. Timing, stress intensity and uniformity are the key factors for stress management. Grain yield, ears per plant, anthesis-silking interval, leaf senescence, tassel size and leaf rolling are the important secondary traits for drought tolerance.更多还原