摘要
以2008～2012年广西普通玉米区试品种一年两季平均产量大于7 500 kg/hm2的37个高产品种为研究对象,对玉米产量与主要农艺性状进行灰色关联度分析。结果表明,8个主要农艺性状与产量的关联度大小顺序为穗粗〉百粒重〉穗行数〉秃尖长〉出籽率〉株高〉穗长〉穗位高,其中穗粗、百粒重、穗行数对产量的影响较大。这说明在玉米高产育种与品种改良工作中,要选择果穗较粗（大于5.00 cm）、籽粒较重（百粒重大于32 g）、穗行较多（14～16行）的品种,同时降低穗位,减少秃尖长,其他各性状保持当前水平,可以实现进一步的增产。这一结果与回归分析基本一致,说明其可作为指导玉米高产育种和品种改良的理论依据。
37 high yielding maize varieties whose average yield was more than 7 500 kg/hm2 two seasons one year from 2008 to 2012 were used as research object, from Guangxi Normal Corn Regional Trial, grey relational analysis on main agronomic traits and yield of maize was carried out. The results showed that correlation between agronomic traits and yield was as follow： ear diameter 100-seed weight rows per ear bald tip length seed producing rate plant height ear length ear height, among them, diameter, 100-seed weight and rows per ear had greater impact on yield. This showed that in order to promote yield,in the work of maize yield breeding, variety with ear thick（greater than 5.00 cm）, grain heavier（100-seed weight greater than 32 g）, ear line more（14--16 lines） should be selected, meanwhile,ear high, bald longer should be reduced, and other traits were kept the current level. Finally, the results were consistent with the regression analysis, therefore, we could take it as theory basis for guiding high yield breeding and improved varieties of maize.
出处
《湖南农业科学》
2015年第3期15-17,20,共4页
Hunan Agricultural Sciences
基金
国家现代农业产业技术体系广西创新团队(玉米)专项(nycytxgxcxtd-01)
关键词
高产普通玉米
产量
农艺性状
灰色关联度
common yielding maize varieties
yield
agronomic traits
gray correlation
