Abstract

VALDES, Magda Piedad; ORTIZ, Sanin  and  VALLEJO, Franco Alirio. TEROTIC EFFECTS FOR THE ETHER EXTRACT CHARACTER IN BUTTERNUT SQUASH Cucurbita moschata DUCH. SEED. rev.udcaactual.divulg.cient. [online]. 2014, vol.17, n.2, pp.371-379. ISSN 0123-4226.

The study aimed to evaluate the average heterotic effects, varietal and specific character to ether extract production in butternut squash seeds Cucurbita moschata. The field and laboratory research was conducted at Universidad Nacional de Colombia Palmira municipality of Candelaria Valle del Cauca, in two semesters: second half of 2012 and first half of 2013. 21 genotypes namely, 6 parents and 15 direct crosses and 5 plants per replication under completely randomized design with 4 replications were used. Characters evaluated were oil production/plant (EEPP); percent of crude fat (EE) in seed; Seed Weight/fruit (PSPF); unit seed weight (PUS) and number of fruits / plant (NFP), using the method proposed by Gardner & Eberhart (1966). The average heterosis was the most important component, as it explained 54% of the variation in the total sum of squares of heterosis. The term where heterosis was better expressed was the second half of 2012; significant differences (P<0,05) for EEPP, EE and PSPF were displayed, indicating that there is genetic divergence between parents and offspring. Based on the effects of varietal heterosis, the best parents for EEPP introductions were 142 and 160. Based on the effects of specific heterosis, with significant effect, P<0,01, in C. mochata for EEPP, the crosses 308 x 142, 308 x 160 and 142 x 136 stand out.

Keywords : Pumpkin squash; oilseed; heterosis; hybridization; dialelic crossing.

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