玉米单交种产量指示性状分析  

Yield Indicating Traits Analysis of Maize Hybrids

作　　者：邢吉敏 蔡春泉 

机构地区：[1]中种集团承德长城种子有限公司,河北承德067000

出　　处：《玉米科学》2003年第4期67-71,共5页Journal of Maize Sciences

基　　金：国家863计划(2001AA241051)

摘　　要：按NCⅡ遗传交配设计,组配84个正反杂交组合,随机区组种植后,对16个玉米产量构成性状进行了遗传相关、线性回归和通径系数分析。结果表明:穗位、株高、穗位/株高、穗长、穗粗、结实长、穗行数、行粒数、百粒重、子粒长、子粒长/宽比11个性状与子粒产量的遗传相关系数为正值,除穗行数与子粒产量的遗传相关未达显著水平外,其余10个性状皆达极显著水平;以决策系数来确定16个产量性状的相对重要性排序为穗长>子粒长>穗粗>行粒数>结实长>穗位>百粒重>穗行数>容重>叶角>子粒厚>子粒宽>出籽率>子粒长/宽>穗位/株高>株高。从中选出前7个主要性状组成回归方程,作为北方春播区玉米子粒产量的选择指示性状。crosses and reverse crosses were made according to NCII genetic mating design.After they had been planted with random blocks,analysis of genetic correlation,linear regression and path coefficient were conduct-ed to16traits which constitute the yield or related with it.The results indicated that the genetic correlation coeffi-cients are all positive between grain yield and ear position,plant height,ear position/plant height,ear length,ear width,length of the ear with kernels,ear rows,kernels per row,hundred kernel weight,kernel length,kernel length/width.All of those correlation were extremely significant in statistic except the one between yield and ear rows.On the basis of their determining coefficients,the rank of importance for the16yield related traits was as follow:ear length>kernel length>ear width>kernels per row>length of ear with kernels >ear insertion>hundred kernel weight>ear rows>unit weight>leaf angle>kernel thickness>kernel width>kernel ratio>kernel length>ear posi-tion/plant height>plant height.The upper7important traits were chosen to built a regression equation which could be as a indicative character for yield selection in Northern spring sowing maize zone.

关 键 词：玉米 产量 指示性状 杂交组合 遗传相关 线形回归 通径系数 决策系数 子粒 

分 类 号：S513.032[农业科学—作物学]