以甘蔗新品种粤糖03—373为材料，对其蔗茎产量及其构成因子之间进行了相关分析、多元回归分析、通径分析和决定系数分析。相关分析结果表明，蔗茎产量与有效茎数、茎长和茎径都呈极显著相关，但与有效茎数关系最密切。多元回归分析结果表明，蔗茎产量与其构成因子间存在着真实的线性关系。通径分析结果表明，有效茎数对蔗茎产量的直接效应最大，对蔗茎产量有极显著影响，且极显著的高于茎径和茎长对蔗茎产量的影响。有效茎数和茎长对蔗茎产量的作用主要为直接作用，茎径对蔗茎产量的作用主要为间接作用。决定系数分析结果表明，有效茎数对蔗茎产量的相对决定程度最大。茎长对蔗茎产量也具有重要作用。对于甘蔗新品种粤糖03—373种植，要提高其蔗茎产量，有效茎数关键，兼顾茎长，而不必强调茎径。%Correlation analysis, multiple regression analysis, path analysis and determination coefficient analysis were undertaken among yield and its components of the new variety Yuetang03-373. Correlation among yield and its components revealed extremely significant correlation and the relationship between yield and stalk number was the most significant. There was linear relationship between yield and its components from the result of multiple regression analysis. Path analysis showed that stalk number was the most important character with the highest direct effect on cane yield relative to stalk length and stalk diameter. The effect of stall number and stalk length to yield was mostly direct while stalk diameter was mostly indirect. Determination coefficient analysis indicated that the relative determination coefficient of stalk number to yield was maximal and stalk length was also important for yield. In the cultivation of Yuetang03-373, stalk number was the key trait to the yield, stalk length secondary, and stalk diameter least.
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