红花种子产量相关性状的通径分析

本试验以9个栽培红花品种为材料,进行种子产量相关性状通径分析。结果表明,9个相关性状对种子产量影响的顺序:单株粒重>单株无效果球数>株高>平均每果粒数>开花期>一级分枝数>百位重>单株有效果球数>单株粒数。降低单株无效果球数是提高种子产量的主要途径。在百料重、一级分枝数、单株无效果球数相对稳定的类型中,选择植株高大的材料,是提高种子产量的重要途径。开花期、单株有效果球数、单株粒数通过株高进行间接选择,亦是提高种子产量的重要途径。选择单株有效果球数多的材料,或在百粒重相对稳定的类型中,选择平均每果粒数多者,亦可提高种子产量。在单选单株粒重高的材料,可能会因为其他相关性状的变化而导致减产。因而两两性状间的互作效应对种子产量的影响极大。

PATH ANALYSIS OF CHARACTERS RELATED TO SEED YIELD IN SAFFLOWER

Nine safflower varieties were used in this study to conduct a path analysis on some characters relevent to yield.Among the nine characters observed,the sequence of their role on seed yield was as follows: weight of seeds per plant>number of non-effective cones per plant>plant height >number of seeds per cone>anthesis>number of primary branches>100 seeds weight>number of effective cones per plant>number of seeds per plant.It was an important way to reduce the number of non-effective cones per plant to increase seed yield.For those genotypes with relatively stable 100 seeds weight,number of primary branches and number of non-effective cones per plant,selection for materials with higher plant height was an effective way to improve yield.Flowering stage,number of effective cones per plant,number of seeds per plant were important traits to improve yield through indirect selection of plant height.Selecting materials with more effective cones per plant could improve seed yield