Abstract: [Objective] The purpose of this paper is to provide academic evidence for germplasm evaluation and innovation of safflower and identify the primary factors of yield by investigating the variation of agronomic traits of safflower.[Method]The correlation analysis,path analysis,principal components analysis and multiple liner regression analysis were conducted,whilst according to the characteristics of safflower growth and development,the main determinant factors of safflower yield formation were analyzed with the method of critical-path analysis.[Result] The results showed that the variation coefficient of agronomic traits of safflower reached from 5.09; to 55.84;,and the yield had an extremely significant correlation (0.722,1) and significant correlation (0.342,9) with bulb number per plant and bulb diameter.The top absolute value of direct path coefficient of safflower agronomic traits to yield was bulb number per plant (0.713,7),which directly affected the yield formation.The determination coefficient of four factors selected by multiple liner regression analysis to safflower yield model was 0.766,8.[Conclusion] To sum up,the safflower varieties with high plant,longer growth period,more fruit ball number and larger diameter head have high yield advantage.

摘要： [目的]分析红花植株农艺性状变异特征,确定构成红花产量的主要因子,为红花种质评价与创新提供理论依据.[方法]通过对红花主要农艺性状进行相关分析、通径分析、主成分分析及多元线性回归分析,结合红花生长发育特点,运用统筹分析,明确红花产量形成的主要决定因子.[结果]红花主要农艺性状变异系数达5.09;～55.84;,红花单株果球数(0.722 1)、顶球直径(0.342 9)与单株产量呈极显著与显著正相关关系;红花植株农艺性状对单株产量的直接通径系数的绝对值以单株果球数(0.713 7)最高,单株果球数对红花产量形成的直接效应最大;多元线性回归分析所选的4个因子对红花产量模型的决定系数达0.766 8.[结论]植株高大、生育期较长、单株果球数多、顶球直径较大的红花品种具有高产的优势.