Sweet Potato New Varieties Screening Based on Morphology, Pulp Color, Proximal Composition, and Total Dietary Fiber Content via Factor Analysis and Principal Component Analysis

Abstract

A sample set of 18 sweet potatoes [Ipomoea batatas (L.) Lam] segmented into six registered cultivars and 12 new varieties were evaluated. The 142 tuberous roots were obtained from a sweet potato germplasm bank (BAG-sweet potato; -27.417713768824555 and -49.64874168439556), specifically from plants belonging to a sweet potato breeding program. All samples were characterized according to their morphology, instrumental pulp color, proximate composition, and total dietary fiber. The analytical results were submitted to parametric and non-parametric statistical tests for sample variance data comparison. Moreover, the screening of the cultivars and new varieties was performed by exploratory statistical analysis, factor analysis (FA), and principal component analysis (PCA). From the sixteen independent variables that characterized the samples, the exploratory FA identified thirteen that had a communality greater than 0.7, with 92.08% of assertiveness. The PCA generated 4 principal components able to account for 84.01% of the explanatory variance. So, among the six registered cultivars, SCS372 Marina and SCS370 Luiza showed the capability to be employed as cultivars for production. Among the 12 sweet potato new varieties, samples 17025-13, 17125-10, and 17117 met the requirements for patent and registration. These results will be useful to farmers who wish to use these sweet potatoes in the development of their crops.

Phytonutritional Composition and Antioxidant Properties of Southern African, Purple-Fleshed Sweet Potato (Ipomoea batatas (L.) Lam.) Storage Roots

“…Sweet potato storage roots are reported to vary in length and diameter [3;303]. The farmer’s choice of sweet potato variety depends on the independent variable weight, since it directly affects crop yield [ 32 ]. Furthermore, sweet potato morphology is crucial when screening new genotypes because consumers may reject roots with undesirable traits [ 32 ].…”

“…The dietary fibre content of sweet potato genotypes differed significantly, with the genotype Purple-purple having the lowest (2.51 ± 0.03 g/100 g) amount and genotype ‘08-21P’ having the highest amount (5.35 ± 0.06 g/100 g), suggesting differences in digestibility. In China [ 51 ], these values were higher, but in Brazil they were lower [ 32 ]. Soluble fibre, approximately half of the total, varied across genotypes, with ‘08-21P’ having the highest (2.48 ± 0.03 g/100 g) and ‘16-283P’ the lowest (0.45 g/100 g).…”

High-Fiber Extruded Purple Sweet Potato (<i>Ipomoea batatas</i>) and Kidney Bean (<i>Phaseolus vulgaris</i>) Extends the Feeling of Fullness

“…This phenomenon may be attributed to kidney beans' higher total fiber content compared to purple sweet potatoes, which predominantly consists of insoluble fiber [Kan et al, 2017]. According to Leite et al [2022], purple sweet potatoes contain fiber ranging from 6.5 to 12.6% of their dry matter, depending on the variety. The fiber content of purple sweet potatoes is primarily composed of cellulose, hemicellulose, and pectin, at 2.7, 3.6, and 0.47%, respectively [Yuansah & Laga, 2023].…”

Effect of Stevia Leaf Extract Substitution on Functional Pudding Characteristics

“…Amount of 50 mL of H2SO4 1.25 % was added to the Erlenmeyer flask containing the sample on a hotplate under the condenser until C was obtained (C = final filter paper weight). The dietary fiber content was calculated using the formula in Equation (1) [22].…”