NIRS Calibration for dry matter & texture on fresh matooke at IITA & NaCRRI Uganda. High-Throughput Phenotyping Protocols (HTPP), WP3

Meghar Karima, Acayo Jennifer, Nuwamanya Ephraim, Davrieux Fabrice. 2022. NIRS Calibration for dry matter & texture on fresh matooke at IITA & NaCRRI Uganda. High-Throughput Phenotyping Protocols (HTPP), WP3. Namulonge : RTBfoods Project-CIRAD, 9 p.

Résumé : This report concern two data bases related to fresh Matooke: 1) physico-chemicals data and 2) NIRS spectral data. The data were collected on fresh Matooke in NaCRRI and IITA (Uganda). 45 genotypes were analysed, for each genotype one to three bunches were used and each genotype is replicated 3 times (3 bunches are evaluated for each genotype). For each sample, 4 fresh fingers are scanned using NIRS. After scanning, each of these fingers is cut in half. One half of the same 4 fingers are boiled and mashed, then scanned twice for NIRS on mashed sample. The other half is peeled, chopped and used for DM determination. The dried sample (after DM) is then ground into powder/flour, from which we obtain spectra and RVA data. Partial Least Square regression (PLSR) is used to associate spectral data and physico-chemical parameters. The direct calibrations of physico-chemical parameters (DM, RVA) using different pretreatments (SNV, SNVD, first or second derivative…) failed.

Mots-clés libres : Matooke, Physico-chemicals data, NIRS, Spectral data, Dry matter

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

Auteurs et affiliations

• Meghar Karima, CIRAD-PERSYST-UMR Qualisud (FRA)
• Acayo Jennifer, IITA (UGA)
• Nuwamanya Ephraim, NaCRRI (UGA)

Contributeurs et affiliations

• Davrieux Fabrice, CIRAD-PERSYST-UMR Qualisud (REU) - collaborateur

Source : Cirad-Agritrop (https://agritrop.cirad.fr/603461/)

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