红花单株花产量相关性状的通径分析

PATH ANALYSIS OF FLOWER YIELD PER PLANT AND COORELATED(CHARACTERS IN SAEFLOWER(CARTHAMUS TINTORIS L.)

本试验以９个载培红花品种为材料进行单株花产量相关性状通径分析。结果表明，各性状对单株花产量的直接效应大小顺序是；分枝高＞株高＞单株有效果球数＞无效分枝数＞单株粒重＞平均每果粒数＞单株粒数＞开花期。株高与分枝高两者间的互作效应对单株花产量的影响居首要地位。在植株高大的类型中选择分枝高度低的材料是提高单株花产量的主要途径。增加株高、降低分枝高度、减少无效分枝数、增加单株有效果球数可较大幅度提高单株花产量。单株花产量高产株型应是植株高大、分枝高度低、无效分枝数少、单株有效果球数多、平均每果粒数和单株粒数多、开花期长、单株粒重低者。

Nine cultivars of safflower were used to study the relationships among the flower yield per plant and several yield constitutional factors by means of path analysis method.The results indicated that all factors effect on the flower yield per plant directly.The significant sequence of these factors is:height of the pranches>height of the plant>effective number of cones per plan>ineffective branches per plant>grain weight per cone>average number of cones>the numberof cones per plant>duration of the florescence period. The high yield safflower varieties possess:taller plant height,lower branches,more effective cone numbers,fewer ineffective cones,lower weight per plant,a higher average number of cones per plant,and the longer period of florescence.