摘要
以不同居群红花栽培的20个优良株系为材料,调查红花主要农艺性状,研究其对单株种子产量影响的相关分析和通径分析。结果表明:11个相关性状对种子产量的影响表现为总果球数>有效果球数>二级分枝数>一级分枝数>单果种子粒数>主茎高>无效果球数>百粒重、株高>分枝与主茎夹角>果球直径。多元回归分析表明,株高(X_1)、总果球数(X_7)、二级分枝数(X_8)、单果种子粒数(X_10)和百粒重(X_(11))直接影响单株种子产量,多元回归方程为Y=35.2587+0.0579X_1+1.5290X_7-0.4211X_8+0.6591X_10+2.1317X_11(F=56.5917**)。通径分析表明,总果球数对单株种子产量的直接效应最大,其次为单果种子粒数,再次是百粒重,以上三者是红花品种选育的主要目标性状。减少单株无效果球数可大幅提高单株种子产量。单株种子产量高产株型应是株高适中、一级分枝数多、有效果球数多、无效果球数少、单果种子粒数多、果球直径大、百粒重高。
Agronomic traits of 10 strains of safflower with good material,coming from different populations,were investigated to study the relationships between the seed yield per plant and main agronomic traits by correlation analysis and path analysis. The results showed that the effects of correlation traits on seed yield are as follows ：the number of total cones per plant the number of effective cones per plant the number of secondly branches the number of primary branches seed yield per fruit stem height the number of ineffective cones per plant kernel weight,plant height branches and main stem angle the diameter of cones. Multiple regression analysis indicated that stem height（X1）,the number of total cones per-plant（X7）,the number of secondly branches（X8）,seed yield per fruit（X10）and kernel weight（X11）all directly affected the seed yield per plant. Multiple regression equation was as follow ： Y=35.2587＋0.0579X1＋1.5290X7-0.4211X8＋0.6591X10＋2.1317X11（F=56.5917＊＊）. Path analysis suggests that the effect of the number of total cones per plant on seed yield per plant ranked the first,followed by seed yield per fruit,then came the kernel weight,which were the main traits in safflower breeding. What＇s more,seed yield per plant significantly increased by reducing the number of ineffective cones per plant. Above all, strain with high seed yield per plant should meet demands of moderate height,more primary branches,more effective balls and less ineffective ones,more seed yield per fruit,large diameter in fruit ball and high kernel weight.
出处
《广东农业科学》
CAS
2015年第21期40-44,共5页
Guangdong Agricultural Sciences
基金
河南省科技攻关项目(112102310018)
关键词
红花
农艺性状
相关
通径分析
safflower
agronomic trait
correlation analysis
path analysis
