Predição de parâmetros genéticos e incremento da qualidade em frutos de progênies de aboboreira (Cucurbita moschata Duch.)

Abstract

The study aimed to estimate genetic parameters and genetic variability, as well as to determine the correlations among fruit variables associated with production and pulp quality attributes in pumpkin progenies. In 2013, the parameters and prediction of progeny gains allowed the ranking of the best individuals in 10 progenies from self pollination. In 2015 the divergence was determined, selecting genotypes for qualitative and quantitative characteristics, and studying the correlations among fruit variables associated with production and pulp quality attributes in 11 evaluated genotypes. In 2013, the REML/BLUP analysis allowed the ranking considering all variables evaluated indicating the individuals 10/1/1, 10/2/12 and 6/1/3 as more promising, being the first two of “piriform” format, and the third of "moranga" format. In 2015, it was found great variability in the progenies evaluated and similarity among progenies C. moschata 1, C. moschata 3, C. moschata 4 and C. moschata 8. The promising progenies for fruit mass and β-carotene were C. Moschata 4 and C. moschata 7 for advances aiming to increase of production and the nutritional characteristics of the fruit. Estimates of carotenoid contents generated by the Hue angle are only valid for contrasting genotypes due to the grouping of genotypes with carotenoid content four times higher than “Jacarezinho” cultivar. The variables explained 98% of the variation in the basic variable in the path analysis and four variables can be used for direct selection aiming to increase of fruit mass.