DOI: 10.5061/dryad.k3j9kd59r
title: Quantitative assessment of trace and macro element compositions of Cassava (Manihot esculenta) storage roots enriched with Β-Carotene as influenced by genotypes and growing locations

description: Cassava’s important mineral contents depends on some factors, including
 genetic and growing locational factors. The study aimed to evaluate the
 influence of genotype and growing locations on the mineral concentrations
 in yellow-fleshed cassava root genotypes. Twenty-five pipeline
 yellow-fleshed cassava genotypes and three white-fleshed varieties (check
 samples) were planted at five different experimental fields for two
 seasons, each representing the major agroecological zones in Nigeria.
 Standard laboratory protocols were employed in the sampling to ensure zero
 contamination, and the trace and macro elements were determined using the
 inductively coupled plasma optical emission spectroscopic method (ICPOES).
 The trace and macro elements identified in all the genotypes and varieties
 investigated were Fe, Mn, B, Cu, Mo, Co, Ni, Zn, and Al; Ca, Mg, Na, K. P,
 and S respectively. Genotype and growing location had a highly significant
 (p &lt; 0.05) effect on all the trace elements except Ti and Cr.
 However, there was no interactive effect between genotype and growing
 location on all the trace elements except for Pb and Zn. Among the
 explanatory variables, the variable growing location was the most
 influential on macro and trace elements. Conclusively, genotypes 01/1442
 and 01/1273 have outstanding trace and macro element concentrations.
description: There was a selection of three
 storage roots (large—900–2300 g, medium—500–899 g, and small—200–499 g)
 and washed thoroughly with potable water to remove dirt and adhered sand
 particles before air-dried on a clean concrete floor. The peeling of the
 storage roots was done manually using a stainless-steel knife, and the
 peeled roots were rinsed with deionized water to remove any contaminants.
 After peeling, the roots were cut longitudinally (from the proximal end to
 the distal end) into four equal parts. Two opposite sections from each
 root of each genotype were taken, combined, manually chopped into small
 pieces, and mixed thoroughly. A batch of samples from this lot was chosen
 for the mineral profiling analysis. The
 processed samples were placed in a petri dish for three days and dried in
 an uncorroded conventional oven at 40 <sup>o</sup>C. After
 drying, the samples were packed in labelled, mineral-free paper envelopes.
 The trace and the macro element content were determined using Inductively
 Coupled Optical Emission Spectrometry (ICP-OES). About 0.30 g of the dried
 sample was weighed into 50 mL screw-cap polypropylene tubes, and added 2.0
 mL HNO3 and 0.5 mL H2O2 to initiate the sample digestion. The samples were
 made to a final volume of 25 mL with 18 MW.cm water before injection. The
 sample flow rate was 2.0 mL/min, and the total analysis time per sample
 was approximately 2.5 min. Each piece was run in duplicate. Al
 concentrations of more than 5–10 mg/kg are frequently associated with
 contaminant Fe. Thus, the concentration of Al of less than 10 mg/kg was
 used to determine the quality of the data, and all samples had an Al level
 of less than 10 mg/kg. The trace elements identified in all the genotypes
 and varieties investigated were Fe, Mn, B, Cu, Mo, Co, Ni, Zn, and Al,
 respectively. Besides, the macro elements identified in all the genotypes
 and varieties investigated were Ca, Mg, Na, K, P, and S,
 respectively.
description: There is no additional information needed for the usage of this
 dataset. There were no missing values.