【摘要】 采用灰色关联分析理论,分析了16个玉米杂交种的农艺性状与产量的关系,结果表明,玉米产量与各农艺性状的关联度排序为:单位面积粒数>灌浆期(d)>灌浆期占总生育期的比>千粒重>穗粒数>生育期(d)>株高>叶片数>成熟时绿叶数>单位面积穗数>单位面积根条数>最长根。进一步分析表明,与高产栽培条件相适应的杂交种是单位面积粒数较多、穗粒数和千粒重较高的中大穗耐密型玉米杂交种;在植株形态性状适合程度上首先表现在有一定的株高和叶片数、根条数;在生育期上灌浆时间的长短对产量的影响最大,因此获得高产应选用生育期较长、灌浆时间占全生育期50%以上的杂交种。更多还原

【Abstract】 Relationships between agronomic characters and yield of 16 maize hybrids were studied with the grey system theory.The results showed that the order of the characters in terms of the importance to yield was kernel number/m2,grain filling stage,grain filling stage/growing period,1000-kernel weight,kernel number per ear,growing period,plant height,number of leaves,number of green leaves at maturity,ear number/ha2,root number/m2,and rootlength.The best hybrids suitable to high-yield cultivation conditions should have the features of more kernel number/m2 and kernel number per ear,higher 1000-kernel weight.They also had considerably higher plant height and number of leaves and roots.The length of grain filling stage had the greatest influence on yield,thus a longer growing period and grain filling stage (more than 50% of the growing period) would be better.更多还原