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Values of Kc in the accessions: Blanca (a), Amarilla (b), Morada (c), Milicia roja (d), Poza Rondador (e), Verde amarilla (f) of mashua cultivated in Querochaca, Province of Tungurahua.
Source publication
p>The aim of this work was to characterize the morphology, phenology, main nutrients and yield, of six accessions of mashua ( Tropaeolum tuberosum Ruiz y Pav) from the central region of Ecuador. The trial was carried out in Cevallos-Ecuador, at 2865 m.a.s.l, single parcels were installed at each accession. The morphological characteristics observed...
Context in source publication
Context 1
... this manner, the Poza Rondador accession possessed the longest cultivation cycle (282 days) while the Amarilla accession was the shortest with 169 days (Figure 3) Relating to the value of the crop coefficient (Kc), no differences were detected in the initial Kc (0.51) between the six accessions. However, differences were detected in the middle and fj al Kc (Figure 4). The mean Kc value was 1.02 in White accession, 1,0 for Amarilla, Morada, and Milicia Roja accessions, 1.1 in Poza Rondador and 0.96 in Verde amarilla. ...
Citations
Bioactive compounds and nutritional characterization in three genotypes of mashua tubers (Tropaeolum tuberosum Ruiz and Pavón) from different agroecological areas of the Peruvian highlands (3747 at 3888 meters above sea level) were studied. The studied genotypes from different agroecological areas significantly differed for vitamins, amino acids, and bioactive compounds. However, the nutritional characteristics of yellow, purple, and yellow-purple mashua remained unaffected. Its tubers were shown to be important sources of protein and fiber. The nutritional analysis revealed high phosphorus and potassium values, as well as considerable amounts of vitamin C. The amounts of total free amino acids in the genotypes ranged from 2.73 ± 0.450 mg/g dry matter (DM) to 6.825 ± 0.450 mg/g DM. Important total anthocyanins, total flavonoids, total phenolics, tannin content, and antioxidant activity values were obtained from purple genotype. Unexploited colored mashua tubers are proposed as a valuable natural source of phenolics and anthocyanins with high antioxidant activity.
The objective of our research was to contrast the resonance techniques on tubers with the more commonly used morphological analyses. With the aims of establishing a classification among ecotypes and food fingerprint of mashua tuber, a multivariable data analysis like principal component analysis (PCA) and orthogonal projections to latent structures discriminant analysis (OPLS-DA), were performed with morphological and metabolomic profiling data. Accordingly, the morphological traits showed a clear separation among most of the studied ecotypes. For a 1H NMR metabolic profiling, at least 35 compounds were identified in tubers. The relative concentration of these compounds was used to perform a PCA and OPLS-DA analysis. A clear separation, according to PC1 = 31.7%, was between TTE_01 & TTE_02 and the ecotypes TTE_06 and TTE_05 with significantly higher concentrations of disaccharides such as maltose and sucrose. Amino acids such as proline and alanine were found and organic acid including succinic, fumaric, formic and acetic acid. In contrast, TTE_05 and TTE_06 ecotypes contained higher concentrations of monosaccharides such as fructose, glucose. Metabolic profile demonstrated to be a more reliable technique than morphological analysis for classification of ecotypes.
