Utilization of NIRS and Minolta Chromameter in selection for increased carotenoids content in cassava roots. [SP10-03]

Sanchez Teresa, Ortiz D., Ceballos Hernan, Dufour Dominique, Davrieux Fabrice, Morante Nelson, Calle Fernando, Zum Felde Thomas, Becerra López-Lavalle Luis Agusto, Chavarriaga P., Hershey Clair. 2012. Utilization of NIRS and Minolta Chromameter in selection for increased carotenoids content in cassava roots. [SP10-03]. In : Second Scientific Conference of the Global Cassava Patnership the 21st Century (GCP21-II), Kampala, Uganda, June 18-22, 2012. s.l. : s.n., Résumé, 1 p. Scientific Conference of the Global Cassava Partnership for the 21st Century. 2, Kampala, Ouganda, 18 Juin 2012/22 Juin 2012.

Url - autre : https://cgspace.cgiar.org/items/d792231a-7f8b-49ca-88a5-092efee4407a

Matériel d'accompagnement : 1 poster

Résumé : Significant progress has been made increasing carotenoids content in cassava roots. The information was used to test the usefulness of NIRs and the Minolta Chromameter in predicting carotenoids content (and other relevant traits). Quantification was made of fresh root tissue (not lyophilized). The dataset (2129 data points) was first cleaned of outlying or suspicious data points to develop reliable prediction equations. R2 values between NIRs prediction and actual measurements were 0.91 for total carotenoids content (TCC); 0.93 for total ?-carotene (TBC), and 0.95 for dry matter content, but is less efficient for cyanogenic potential (0,81). Standard error of cross validation (SECV) for TCC and TBC were (1.191 and 0.837, respectively) while the residual predictive deviations (RPD) were also acceptable (above 3.0). These results suggest that NIRs can be used to reliably predict different variables based on fresh root samples. The Minolta Chromameter can also be used for pre-selection as its R2 values were 0.58 for TCC and 0.64 for TBC. Relative concentration of different carotenoids and precursors did not suggest the existence of a major blockage in the metabolic pathway towards the synthesis of ?-carotene. Once phytoene is synthesized most to the different pigments in the metabolic pathway are found, as expected, in correlated proportions.

Classification Agris : F30 - Génétique et amélioration des plantes
F60 - Physiologie et biochimie végétale
Q04 - Composition des produits alimentaires
U30 - Méthodes de recherche

Auteurs et affiliations

• Sanchez Teresa, CIAT (COL)
• Ortiz D., CIAT (COL)
• Ceballos Hernan, CIAT (COL)
• Dufour Dominique, CIRAD-PERSYST-UMR Qualisud (COL) ORCID: 0000-0002-7794-8671
• Davrieux Fabrice, CIRAD-PERSYST-UMR Qualisud (FRA)
• Morante Nelson, CIAT (COL)
• Calle Fernando, CIAT (COL)
• Zum Felde Thomas, CIP (PER)
• Becerra López-Lavalle Luis Agusto, CIAT (COL)
• Chavarriaga P., CIAT (COL)
• Hershey Clair, CIAT (COL)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/565668/)

Métriques

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