鲜食糯玉米主要农艺性状相关及通径分析

Correlation and path analysis of main agronomic traits of fresh-eating waxy maize

糯玉米(Zea mays L.var.ceratina Kulesh)单株产量性状是受多基因控制的,且各性状之间也会互相作用.以广东省选育的15个鲜食糯玉米杂交组合为材料,随机区组设计,调查株高、穗位高、叶片数、穗上叶数、穗位叶长、穗位叶宽、茎粗、果穗长、秃尖长、果穗直径、穗行数、行粒数、轴粗、鲜苞质量和鲜穗质量共15个农艺性状,进行相关性分析及通径分析.结果表明15个农艺性状中果穗长、轴粗、株高、叶片数和穗位叶宽与鲜穗质量呈显著正相关关系,相关系数从大到小的顺序表现为果穗长>轴粗>叶片数>穗位叶宽>株高.在糯玉米品种选育时,果穗长、轴粗、株高、叶片数和穗位叶宽等可作为关键选育农艺性状.

The yield traits of waxy maize(Zea mays L.var.ceratina Kulesh)per plant are controlled by multiple genes,and the traits also interact with each other.15 fresh-eating waxy maize hybrid combinations from Guangdong Province were used as materials,plant height,ear height,leaf number,leaf number above ear,ear leaf length,ear leaf width,stem diameter,ear length,bald length,ear diameter,rows per ear,kernel number per row,cob diameter,fresh bud weight,ear weight,a total of 15 agronomic characters were investigated,and the correlation and path analysis was carried out.The results showed that ear length,cob diameter,plant height,leaf number and ear leaf width were significantly positively correlated with ear weight,and the correlation coefficients from large to small were as follows:ear length>cob diameter>leaf number>ear leaf width>plant height.Ear length,cob diameter,plant height,leaf number and ear leaf width were the key agronomic traits in waxy maize breeding.