LOCAL regression algorithm improves near infrared spectroscopy predictions when the target constituent evolves in breeding populations

Davrieux Fabrice, Dufour Dominique, Dardenne Pierre, Belalcazar Javier, Pizarro Monica, Luna Jorge, Londoño Luis Fernando, Jaramillo Angélica M., Sanchez Teresa, Morante Nelson, Calle Fernando, Becerra López-Lavalle Luis Agusto, Ceballos Hernan. 2016. LOCAL regression algorithm improves near infrared spectroscopy predictions when the target constituent evolves in breeding populations. Journal of Near Infrared Spectroscopy, 24 (2) : 109-117.

Quartile : Q3, Sujet : CHEMISTRY, APPLIED / Quartile : Q3, Sujet : SPECTROSCOPY

Résumé : The CGIAR Harvest Plus Challenge Program began in the mid-2000s to support the genetic improvement of nutritional quality in various crops, including the carotenoids content of cassava roots. Successful conventional breeding requires a large number of segregating progenies. However, only a few samples can be quantified by high performance liquid chromatography each day for total carotenoids (TCC) and b-carotene (TBC) contents, limiting the gains from breeding. This study describes the usefulness of near infrared (NIR) spectroscopy and the efficiency of a large database coupled to a LOCAL regression algorithm to reach accurate TCC/TBC predictions on fresh cassava roots. The cassava database (6026 samples) was built over six years. TCC values ranged from 0.11µg g–1 to 29.0µg?g–1, whereas TBC ranged from negligible values up to 20.1µg g–1. All values were measured and expressed on a fresh weight basis. Between 2009 and 2014 increases in TCC and TBC were 86% and 122%, respectively. A comparison of calibrations using partial least squares (PLS) regression and LOCAL regression was done. The standard error of prediction were 1.82µg g–1 for TCC and 1.28µg g–1 for TBC using PLS model and 1.38µg g–1 and 1.02µg g–1 respectively, using LOCAL regression. The specificity of the data, with increasing content of the constituent of interest year after year, clearly showed the limitation of the classical partial least squares regression approach. The LOCAL regression algorithm takes advantage of large databases; this study highlighted the efficiency of this concept. NIR spectroscopy coupled to LOCAL regression led to efficient models for breeding programmes aiming at increasing carotenoids content in fresh cassava roots. NIR spectroscopy can also be used to predict other important constituents such as dry matter content and cyanogenic glucosides.

Mots-clés Agrovoc : Manihot esculenta, manioc, génétique des populations, amélioration des plantes, caroténoïde, enrichissement des aliments en éléments nutritifs, composition des aliments, spectroscopie infrarouge, technique de prévision, analyse de régression

Mots-clés géographiques Agrovoc : Colombie

Classification Agris : F30 - Génétique et amélioration des plantes
Q04 - Composition des produits alimentaires
U10 - Informatique, mathématiques et statistiques
F60 - Physiologie et biochimie végétale

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Davrieux Fabrice, CIRAD-PERSYST-UMR Qualisud (REU)
• Dufour Dominique, CIRAD-PERSYST-UMR Qualisud (COL) ORCID: 0000-0002-7794-8671
• Dardenne Pierre, CRA (BEL)
• Belalcazar Javier, CIAT (COL)
• Pizarro Monica, CIAT (COL)
• Luna Jorge, CIAT (COL)
• Londoño Luis Fernando, CIAT (COL)
• Jaramillo Angélica M., CIAT (COL)
• Sanchez Teresa, CIAT (COL)
• Morante Nelson, CIAT (COL)
• Calle Fernando, CIAT (COL)
• Becerra López-Lavalle Luis Agusto, CIAT (COL)
• Ceballos Hernan, CIAT (COL)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580805/)

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