NIRS analyses of sensory & textural traits in sweetpotato based on spectra collected on raw freeze-dried roots

Nantongo Judith Ssali, Serunkuma Edwin, Burgos Gabriela, Davrieux Fabrice, Meghar Karima, Ssali Reuben. 2023. NIRS analyses of sensory & textural traits in sweetpotato based on spectra collected on raw freeze-dried roots. Kampala : RTBfoods Project-CIRAD, 11 p.

https://doi.org/10.18167/agritrop/00729

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Résumé : A spectral analysis of 217 sweetpotato genotypes was undertaken. These were collected from different CIP sweet potatoe genetic trials (GT) located in different agroecological zones (AEZ); West nile AEZ (Abii GT; L. Albert AEZ (Hoima and Buling GTs); Southern highlands (Kabale GT); Lake Victoria Crescent (Namulonge MDP); Western highlands (Rwebitaba MDP); and L.Kyoga basin (Serere GT). The samples were collected in two different seasons of 2021 and 2022. Harvests took place in the second season of 2021 (94 genotypes) (and the first season of 2022 (123 genotypes). Calibrations were done using reference data collected by a sensory panel as well as texture parameters assessed using a texture analyser. Up to twelve cooked roots per genotype were used for sensory evaluation of traits per session. High performances were observed of the calibration for orange color intensity (R2 =0.83), suggesting that the model is sufficient for field application. The moderate performances of pumpkin aroma and pumpkin flavor ((R2 >0.50) could be used for initial screening purposes. Most of the calibrations still need improvement.

Mots-clés libres : NIRS, Sweet potato, Sensorial profiles, Textural properties, Phenotyping, Chemometrics, Calibrations

Agences de financement hors UE : Bill and Melinda Gates Foundation, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Centro Internacional de Agricultura Tropical, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, James Hutton Institute

Projets sur financement : (FRA) Breeding RTB Products for End User Preferences

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