24份南瓜杂交组合主要农艺性状与产量的相关及通径分析

Correlation and path analysis of main agronomic characters and yield in 24 pumpkin hybrid combinations

对24份南瓜(Cucurbita moschata Duch.)杂交组合的12个农艺性状进行相关和通径分析,结果表明,瓜把和瓜肚具有相对较高的遗传价值;单株产量与单瓜重量(r=0.66**)、蔓长(r=0.56**)、单株结瓜数(r=0.53**)呈极显著正相关,与节间长度(r=0.47*)、叶片面积(r=0.46*)和第一雌花节位(r=0.43*)呈显著正相关,与瓜把(r=-0.22)呈负相关。通径分析结果表明,单瓜重量、单株结瓜数、果实横径、第一雌花节位、瓜把、节间长度的直接效应对南瓜单株产量有正向作用,蔓长、叶片面积、果实纵径、瓜肚、肉厚对南瓜单株产量的直接效应为负向作用。因此,在丰产育种时,要协调好各性状之间的关系,以单瓜重量对产量的影响为主,蔓长与单株结瓜数为辅。

Correlation analysis and path analysis of 12 agronomic traits of 24 pumpkin hybrid combinations were performed in this study.The results showed that,the fruit neck and melon have rich genetic variation.The yield per plant have significantly positive correlation with single fruit weight(r=0.66**),vine length(r=0.56**),and the number of fruit per plant(r=0.53**),and internode length(r=0.47*),leaf area(r=0.46*)and the first female flower node(r=0.43*)showed a significant positive correlation,and negatively correlated with melon(r=-0.22).The results of the path indicate that the direct effect of the weight of single melon,the number of melons per plant,the diameter of the fruit,the first female flower node,the melon,and the internode length have a positive effect on the yield of pumpkin per plant,vine length,leaf area and fruit.The direct effect of longitudinal diameter,melon belly and flesh thickness on the yield per plant of pumpkin is negative.Therefore,in the breeding of high yield,it is necessary to coordinate the relationship between the traits,the effect of the weight of single melon on the yield,and the number of vines and the number of single plants.