临麦4号主要经济性状的相关与通径分析

Correlation and Path Analysis of the Major Economic Traits of Linmai 4

[目的]为生产上采取相应的栽培措施及良种良法技术配套提供科学依据。[方法]采用逐步回归、相关与通径分析等多元分析方法研究了优良小麦新品种临麦4号的主要经济性状与产量间的相关关系。[结果]穗数、穗粒数及千粒重与产量间达显著或极显著偏相关,各主要经济性状对产量的直接效应由大到小顺序依次为穗粒数、穗数、千粒重、株高、冬前群体。穗数、穗粒数和千粒重是影响产量的主要经济性状,冬前群体与株高能显著影响穗数,但株高过高则影响穗粒数的增加。[结论]各性状间的有机结合能使临麦4号发挥出最大的增产效应。

[Objective]To provide scientific basis for adopting corresponding cultivation measures in production and good cultivar and technical support. [Method]Stepwise regression,correlation and path analysis and other multivariate analysis methods were used to research the correlation between major economic traits and yield of new wheat variety Linmai 4. [Result] Ear number,seeds per ear and 1 000-grain weight had significant or extremely significant partial correlation with yield. The direct effects of major economic traits on yield from big to small was in the order of seeds per ear,ear number,1 000-grain weight,plant height,population before winter. Ear number,seeds per ear and 1 000-grain weight were the major economic traits affecting the yield. Population before winter and plant height significantly affected the ear number,but overhigh plant influenced the increase of seeds per ear. [Conclusion]Linmai 4 could extert the maximum yield increasing effect only when the traits were organically combined.