Morphological diversity among Brazilian Capsicum peppers

Abstract

This research aimed to morphologically characterize and estimate the genetic diversity of 21 Capsicum accessions belonging to the Capsicum Germplasm Active Bank at the Universidade Federal do Piauí (BAGC-UFPI) using uni- and multivariate analysis. The experiment was carried out in a greenhouse, by completely randomized experimental design with four repetitions, with one plant per plot. Analysis of variance (ANOVA) and the comparison of means for seven quantitative variables were performed, followed by clustering the averages by the Scott-Knott test (P < 0.05). The analysis of the seven quantitative and thirteen qualitative descriptors was estimated based on the Gower distance. Later, it was performed the principal component analysis and the UPGMA hierarchical cluster method. Results characterized and identified a wide intra- and interspecific genetic variability related to the fruit size, colors, and shapes among the Brazilian Capsicum genotypes belonging to the BAGC-UFPI. The descriptors used in this research were effective in the discrimination of the pepper accessions, especially the closely related C. frutescens and C. chinense species.