改良群体耐密抗倒能力并提高品质一直是玉米研究的重要方向,而倒伏对玉米产量和品质都有重要影响。为了筛选抗倒耐密品种,本研究主要分析高密度条件下14个杂交组合茎秆穿刺强度、压折强度和穗位系数的变化与倒伏的关系,并利用通径分析,解析其对产量的影响作用。多地点的方差分析和相关分析表明茎秆穿刺强度、压折强度、穗位系数、倒伏率、密度与产量密切相关,随着密度的提高,穗位系数和倒伏率增加,茎秆穿刺强度、压折强度和产量均降低。通过逐步回归和通径分析,对产量作用因子进行分解,发现高密度下对产量的影响作用倒伏率>穿刺强度>压折强度,最终遴选出耐密性优异的高产组合ZD181和ZD179,为玉米耐密抗倒伏育种提供参考和技术支持。
英文摘要:
Improving the quality and abilitySofSresistance lodging with high density loads, which is always one of the most important subjects in maize research, but lodgingShas seriously influence onSgrainSyield andSquality. In order to screen lodgingSresistance and high-density-tolerance maize varieties, in this article, the relationship is investigated between the change of rind penetration strength、stalk breaking strength、ear height coefficient and lodging base on 14 crossScombinations under theShigh density, and dissecting the effectSon yield with theSmethodSofSpath analysis. Multi-site variance analysis and correlation analysis show that rind penetration strength、stalk breaking strength、ear height coefficient、lodging percentage、density are significant correlationSto theSyield. With the increase of planting density, ear height coefficient and lodging percentage increase, rind penetration strength、stalk breaking strength and yield reduce. AccordingSto stepwiseSregression analysisSandSpath analysisSindicated that lodging percentage > rind penetration strength > stalk breaking strength during the factor of yield components, we select two excellent high-density-tolerance crossScombinations such as ZD181 and ZD179 in finally. It providedSreferenceSand technicalSsupportSfor high-density-tolerance andSlodging-resistantSbreeding of maize.
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