| Five lines of pumpkin (Cucurbita moschata Duchesne) were evaluated in a diallel design at the Fortuna Substation of the Agricultural Experimental Station, in March 1999. The objectives of this study were to determine general combining ability (GCA) and specific combining ability (SCA), heterosis and inbreeding depression in crosses between temperate and tropical lines of pumpkin.;The lines used consisted of three parents of temperate origin and short vines, TP312, BN111 (both developed in Florida) and 'Waltham Butternut', and of two parents of tropical origin and long vines, 'Soler' and 'La Segunda'. Along with their F1 and F2 progeny, the number of days from planting to the opening of the 50% of the female and male flowers, the number of fruits and the total yield in each plot were measured. From the yield data, the average number of fruits per plant, the yield per plant, and the average fruit weight was calculated. (Abstract shortened by UMI.). |
