Dataset on dry matter and pasting properties of cassava roots (Manihot esculenta Crantz) from Genetic Gain Assessment (GGA) trial grown in different locations

The cooking quality, especially the pasting properties, is essential in cassava starch applications or successfully utilizing cassava in food industries and at the household level. This study evaluated the cassava roots from the Genetic Gain Assessment trial grown in three different locations for dry matter (DM) and the pasting characteristics. Four hundred cassava genotypes were planted under IVS (Dry season in Inland Valley Hydromorphic area) and Upland (rain-fed conditions) trials at IITA Research Farms, Nigeria- 2 locations in Ibadan (IVS and Upland) and 1 location in Mokwa (Upland). The harvested cassava roots (12months after planting) were analyzed for DM, and the dried-milled roots were analyzed for pasting properties using the standard laboratory methods. The DM ranged from 25.04 to 38.72%, with a mean of 31.97 ± 2.41%. The pasting properties (peak, trough, breakdown, setback and final viscosities) ranged from 140.36 to 570.93 RVU (mean 241.71± 38.17), 6.74 to 173.32 RVU (mean 96.65±23.45), 66.97 to 482.35 RVU (mean 142.44±30.16), 60.06 to 231.74RVU (mean 134.42±30.52) and 5.22 to 135.69 RVU (mean 37.78±12.96) respectively. The genotypes had no significant effect (P>0.05) on the DM and pasting properties, but the growing location showed a highly significant effect (P<0.05) on all the parameters studied. The cluster analysis grouped the genotypes into 2 clusters where clusters 1 and 2 had 115 and 285 genotypes, respectively. Final viscosity had the highest eigenvector of 0.51 on PC1, and setback had the lowest (0.39) on PC1. For PC2, the breakdown had the highest vector (0.66) and trough with the lowest (- 0.40). Knowing the impact of genotype and grown location on the pasting behaviour could help the breeders select the best genotypes with excellent qualities that could adapt to different environments and identify the suitable growing area for the best cooking quality.