澳洲坚果主要农艺性状相关分析及产量因素的通径分析

为了选育适宜桂西南地区的优良栽培品种，深入探讨澳洲坚果农艺性状与产量的关系。以50株澳洲坚果资源为材料，对其果实性状进行相关分析和通径分析。结果表明：（1）带皮果鲜重与鲜壳果重、干壳果重呈显著相关，说明三者越重，澳洲坚果果实产量越高；出仁率与果仁厚呈显著正相关，而与鲜壳果重、干壳果重呈显著负相关，说明果实越大，就会有更多光合产物分配到果壳中。（2）通径分析结果表明：单个鲜壳果重对出仁率为正向效应，鲜壳果重对果实产量和出仁率的贡献最大，鲜壳果重每增加1个标准单位，会使出仁率增加 0.5315个标准单位。因此，选育澳洲坚果优良品种，育种时要着重关注单果重、每果出仁率等性状。

Correlation Analysis of Main Agronomic Traits and Path Analysis of Yield Factor in Macadamia integrifolia F.

The paper aims to breed fine varieties of Macadamia suitable for cultivation in southwestern Guangxi in China, and investigate the relationship between agronomic traits and the yield. Correlation and path analysis of the agronomic traits of fruit were carried out by using 50 plants of different Macadamia varieties. The results showed that: (1) the skin fresh weight was significantly correlated with the shell weight and dry shell weight, indicating that the heavier the three traits were, the higher the Macadamia’s yield was; the kernel percent was significantly and positively correlated with the nut thickness, but was significantly and negatively correlated with the shell weight and dry shell weight, indicating that with the fruit size increase, more photosynthate would be distributed into the pod shell; (2) path analysis results showed that the single fresh shell weight had a positive effect on the kernel percent, the fresh shell weight had the biggest contribution to the fruit yield and the kernel percent; the increase of each standard unit in the fresh shell weight could result in the increase of the kernel percent by 0.5315 standard unit. The results suggested that the focus of Macadamia breeding should be per fruit weight and kernel percent per fruit.