Abstract
ABSTRACT Sweetpotato (Ipomoea batatas) is a root crop grown in many countries. This tuberous root is a source of energy, nutrients, and phytochemicals. In this study, bioactive compounds and physical and physicochemical qualities of sweetpotato genotypes were evaluated. Eight new genotypes of sweetpotato produced by Embrapa Hortaliças (orange-fleshed: MD09026-OF and MD09024-OF; cream-fleshed: MD09011-CF, MD09004-CF, MD10039-CF, and MD10004-CF; yellow-fleshed: MD09017-YF and MD12002-YF) and two cultivars used as controls (Beauregard and Brazlândia Roxa) were evaluated for color, soluble solids, dry matter, phenolic compounds, total carotenoids and β-carotene. Hue angles differed even between those sweetpotatoes with the same flesh color. The orange-fleshed genotypes MD09024-OF, MD09026-OF, and Beauregard, had the lowest L*, showing to be darker than the others. These sweetpotatoes also had the brightest flesh colors with higher C*. The orange-fleshed genotypes MD09026-OF and MD09024-OF were sweeter (10.55oBrix and 9.23oBrix) than Beauregard (5.12oBrix). Brazlândia Roxa had the highest dry matter content (38.05%), followed by the genotypes MD10004-CF, MD09017-YF, MD09026-OF MD10039-CF, and MD09011-CF, which showed similarity, ranging from 32.33% to 29.12%. The highest contents of total carotenoids were found for the orange-fleshed genotypes MD09026-OF (80.06 mg g-1) and MD09024-OF (70.56 mg g-1) and Beauregard (73.12 mg g-1). These same genotypes showed the highest total phenolic compounds (0.815 mg g-1 and 0.686 mg g-1, respectively). MD09026-OF showed the highest content of β-carotene (46.47 mg g-1). MD09026-OF was the most prominent genotype among those evaluated, as it showed the highest total carotenoid, β-carotene, phenolic compounds, and soluble solids content, in addition to a high dry matter content.
Highlights
Caracterização da qualidade, teor de fenólicos e carotenoides de novos genótipos de batata-doce de polpa laranja, creme e amarela
Os maiores teores de carotenoides totais foram encontrados para os genótipos de polpa laranja MD09026-OF (80,06 mg g-1) e MD09024-OF (70,56 mg g-1) e Beauregard (73,12 mg g-1)
Orangefleshed sweetpotatoes are predominantly rich in β-carotene, the most relevant provitamin A carotenoid (Teow et al, 2007)
Summary
Caracterização da qualidade, teor de fenólicos e carotenoides de novos genótipos de batata-doce de polpa laranja, creme e amarela. O MD09026-OF foi o genótipo que mais se destacou entre os avaliados, pois apresentou os maiores teores de carotenoide total, β-caroteno, compostos fenólicos e sólidos solúveis, além de teor mais alto de matéria seca. Sweetpotatoes are a source of Horticultura Brasileira 39 (3) July - September, 2021 energy due to their high starch content (Roy & Chakrabarti, 2003), nutrients, and phytochemicals (Hussein et al, 2014) This tuberous root has color variations due to the presence of different bioactive compounds, such as carotenoids, anthocyanins, phenolics, and flavonoids (Shekhar et al, 2015; Wang et al, 2018; Frond et al, 2019). In Brazil, this nutritional deficiency persists as a moderate public health problem, especially in the Northeast and in some places in the Southeast and North (Lima et al, 2018; BRASIL, 2020a)
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