摘要
为了给玉米育种工作者选育抗旱自交系及抗旱新品种提供简单易测的鉴定指标,试验在玉米四个比较重要的生育时期:萌发期、苗期、开花期、灌浆期,采用人工模拟干旱胁迫的方法,通过比较形态学、发育学、生理学等方面的抗旱性鉴定指标与玉米抗旱能力的关系,通过玉米抗旱性与各指标的相关分析、灰色关联度分析、聚类分析,将种子萌发胁迫指数、幼苗反复干旱成活率、花期抗旱指数和灌浆期抗旱指数作为玉米四个生育时期的抗旱性鉴定指标,并将其定义为一级抗旱指标,并在此基础上建立了玉米种质的抗旱性技术鉴定体系,形成了玉米抗旱性鉴定技术规程,为综合评价不同玉米品种的抗旱性奠定了基础。
In order to provide a simple and feasible identifying index for corn breeders in and breeding of advanced drought-resistant cuhivars. This test adopts artificial drough drought during inbreding the more important four periods of corn： the germination period, the seedling period, the flowering period, and the pustulation period. This test comparates drought - identifying index and corn drought capacity of morphology, developmental science, physiology and other aspects. Analysising correlation of corn drought and various indicators through grey correlation analysis, cluster analysis, Regarding the germination index under the stress of drought, the survival rate of seedlings under the repeated drought, the drought index in flowering and the drought index in the postulation as drought - identifying index in the four growing periods of corn and defining them as the first-level drought index. Basing on this, the drought technical appraisal system was established and the drought technical appraisal procedure was formed on corn which can lay a foundation for comprehensive evaluation in different corn cultivars.
出处
《中国农学通报》
CSCD
北大核心
2009年第12期66-68,共3页
Chinese Agricultural Science Bulletin
关键词
玉米
生育时期
抗旱鉴定指标
corn, planting stages, drought -identifying index drought
