Avaliação da variabilidade do teor de matéria seca, fibras e cinzas nas raízes de 15 genótipos de batata-doce (Ipomoea batatas L. Lam) produzidos em Moçambique

Abstract

In Mozambique, sweet potato is one of the staple food crops and plays a very important role in the diet of rural households. Sweet potatoes are consumed in various ways (boiled, roasted and fresh), with the most traditional form in Mozambique being boiled. Sweet potato roots of certain genotypes have a perfect appearance (colour, shape and texture), but when consumed they may not have good sensory characteristics, and may have low dry matter and high fibre contents, making them unsuitable for commercialisation and consumption. The aim of this study was to analyse the variability of dry matter, fibre and ash contents in the roots of 15 sweet potato genotypes (Ipomoea batatas L. Lam) produced in Mozambique. For this purpose, a trial was conducted in Nwalate, in the Boane district. The genotypes Caelan, MUSG 09169-13, Namanga, MUSG01124-6, Xidumbedumbe, MUSG012068-13, Delvia, MGSG 12042-14, Nsantimuni, Lilas, Secai, MUSG18019-18, Olga, Irene and MGSGR18012-16 were evaluated. These genotypes were obtained from the germplasm bank of the International Potato Center. The experimental design called Row Column Design was used, with 16 lines, 12 columns and 3 replicates and 192 plots. The results show that the dry matter contents of the different genotypes are statistically different and ranged from 20,825 to 32,405%, the genotype MUSG 09169-13 had the lowest content and MGSGR18012-16 the highest dry matter content. The crude fiber contents are statistically equal and ranged from 1,721 to 5,072%, the genotype MUSG18019-18 had the lowest content and MGSGR18012-16 the highest content. The insoluble fiber contents were also statistically equal and ranged from 0,397 to 3,176%, the genotype Lilas had the lowest content and Ntsatimuni the highest content. The ash contents were statistically equal and ranged from 1,276 to 2,996%, the Delvia genotype had the lowest content and Lilas the highest content. The results also demonstrated that there is no interaction between the dry matter, fiber and ash contents.(TRADUÇAO NOSSA)