Management and evaluation of the vegetative growth of three pumpkin materials (Cucurbita moschata Duch. ex. Lam) by non-parametric methods and bootstrap

The morphological diversity of the fruits of Cucurbita moschata Duch. ex. Lam can influence the yield and quality of this important crop in Peru, Venezuela and other countries. This research aims to evaluate the vegetative growth of three plant materials of C. moschata Duch. ex. Lam with differences in the shape of their fruits (globular, lageniform and oblong) using non-parametric methods for the analysis of longitudinal data (ANOVA-type and Wald-type statistics). and bootstrap on morphological characteristics. The empirical distribution and type I error of range-based statisticians were determined and compared with parametric procedures. The results showed; robustness of the ANOVA-type statistic and its control over the type I error rate for effects where time is involved as a subplot, consistency of the Wald-type estimator for sample sizes nj=60, and the advantages of the ANOVA-type statistic for multiple comparisons of morphological characteristics of C. moschata Duch. ex. Lam versus parametric procedures, for sample sizes nj=12, data with asymmetric distribution and discrete variable. Differences were observed in stem diameter at the beginning and end of the test between the lageniform and oblong fruits, in the petiole diameter of the globular fruits, in the lamina length of lageniforms, and between the lamina width of the globular and lageniform fruits.