Abstract

ESPINOSA-CARILLO, José Francisco  and  VALLEJO-CABRERA, Franco Alirio. Genetic variability of families of half-sibling of ecuadorian creole melon Cucumis melo var. dudaim (L.) Naudin. rev.udcaactual.divulg.cient. [online]. 2020, vol.23, n.2, e1762.  Epub July 30, 2020. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v23.n2.2020.1762.

Melon is an important horticultural crop in temperate and warm climates around the world; however, information on the genetic variability of ecuadorian creole melon is limited to initiate breeding programs. The objective of this research was to evaluate 20 families of half-sibling of ecuadorian creole melon by characteristics of production and fruit quality. The study was carried out in Palenque canton, Ecuador. The seed of the 20 families selected was arranged in complete blocks at random with three repetitions. The differences between families were significant for seven characters. Family 73 had greater weight, diameter, length, thickness, fruit cavity, and production per hectare, family 7 had the highest average for bark thickness, soluble solids and pulp firmness; the 196 family for pulp acidity. There are highly significant phenotypic associations between fruit weight with diameter, length, pulp thickness, fruit cavity and production per hectare. The coefficients of genotypic variation were greater than the coefficients of environmental variation. The estimates of heritability in the broad sense were of high magnitude (>60%) for the 10 characters evaluated and the magnitude of the expected genetic progress was high (>20%) for fruit weight, production per hectare, and bark thickness; moderate for fruit cavity and total solids; the selection for melons of the dudaim variety should focus on soluble solids content and fruit weight that showed a high correlation with yield.

Keywords : Genetic variation; Environmental variation; Heritability; Genetic progress.

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