爆裂玉米膨胀倍数的相关和通径分析

试验选用 8份遗传差异较大的爆裂玉米自交系做亲本 ,按Griffing方法 2进行配制组合 ,对当年收获的 36份材料进行了系统的调查和探讨 ,研究了膨胀倍数性状的亲子回归与相关 ,进行了膨胀倍数与其它性状的相关与通径分析。结果表明 :F1代与亲本之间普通存在着极显著的正相关 ,且与母本的相关程度高于与父本的相关程度。遗传相关分析表明 :膨胀倍数与穗行数、穗位高呈极显著正相关 ;与秃尖长、百粒重、茎粗呈极显著负相关 ;与轴粗、爆粒率、株高呈显著正相关。通径分析表明 :对膨胀倍数直接作用、间接作用均较大且基因型相关系数达显著或极显著水平的性状有茎粗、爆粒率、轴粗和穗行数

Studies on the Correlation and Path_coefficient Analysis of Seed Expansion Times in Popcorn(Zea mays everta Sturt)

In this experiment,8 popcorn inbreeds which have remarkable genetic difference were selected to make crosses by method Ⅱ of Griffing.Systematic investigation and study had been done for 36 materials harvested previous year and studied the parentage regression and correlation of seed expansion times characters and correlation and path analysis between times of seed expansion character and other characters.The results indicated:significant positive correlation generally existed between F1 generation and parents,correlation level of female parent was higher than that of male parent.Genetic correlation analysis showed:There was highly significant positive correlation between times of expansion and row number of ear,height of ear,negative correlation between times of expansion and length of bald,weight of 100 grain and stem wide,and remarkable positive correlation between times of seed expansion and axes wide,ratio of expansive grain and plant height.Axes wide,weight/stem,ratio of bold,weight/axes and yield/plant had more direct and indirect effect on times of seed expansion.