Abstract:

The F₁ generation was obtained by crossing the parental material‘zx-15’and the maternal material‘zx-101’,and then the F₂ population was obtained by F₁ self-crossing. Genetic law of 11 fruit and seed traits of the F₂ group were analyzed,and the path analysis of single fruit weight was also conducted. Results showed that the presence or absence of wax powder,seeds with or without angles and seed coat with or without hairs were controlled by a single dominant gene;single fruit weight,fruit length,fruit width,fruit thickness,fruit hardness,fruit color,cavity size and soluble solids content were all quantitative traits. The optimal genetic model for fruit thickness was MX2-ADI-ADI,for fruit hardness,soluble solids content and cavity size was MX2-ADI-AD,and for fruit color was 2MG-AD;soluble solids content,cavity size and fruit color had higher heritability of main genes,while single fruit weight and fruit width were controlled by micro-effective polygenes and were greatly affected by the environment. A stepwise regression was used to establish the regression model equation for the factors influencing the single fruit weight of wax gourd,and the path analysis showed that fruit length and width were the main factors affecting the yield of wax gourd,in which the direct and mutual indirect influences played equal roles.

Key words: wax gourd, fruit trait, seed trait, genetic law, single fruit weight, path analysis