Caracterização agronômica em Dioscorea spp no Recôncavo Baiano

Abstract

This study aimed to characterize with respect to morphological descriptors 200 genotypes of yam (Dioscorea sp), belonging to the producing areas of the municipalities of Cruz das Almas, Batatan, San Felix and San Felipe in the Recôncavo. The design was a randomized block design with three repetitions were performed. The traits corresponded to the productive part of the plant, as follows: average weight of marketable rhizophores (PMRC - in kg) (corresponding to the ratio of the sum of the weights of rhizophores large and medium-sons, with total production of rhizophores-children), width of rhizophores (LR - in cm) and length of the prop roots (CR - in cm). The differences between genotypes show the presence of variability for the traits analyzed. The coefficients of variation ranged from 18.93% (weight of turbéculo) the 28.38% (length of turbéculo). genetic dissimilarity among the 200 genotypes evaluated yam, contributing 65.13% to the total dissimilarity, indicating that this should be prioritized in the choice of parents in breeding programs followed by the character width of the tuber. The value of the correlation coefficient cofenético (CCC) was 0.90. The character of the tuber weight was the largest contributor to the total genetic dissimilarity among the 200 genotypes analyzed yam. The presence of variability allowed the identification of dissimilar genotypes.