Rapid cycling recurrent selection for increased carotenoids content in cassava roots

Ceballos Hernan, Morante Nelson, Sanchez Teresa, Ortiz D., Aragon Isabelle, Chávez A.L., Pizarro Monica, Calle Fernando, Dufour Dominique. 2013. Rapid cycling recurrent selection for increased carotenoids content in cassava roots. Crop Science, 53 (6) : 2342-2351.

Quartile : Q2, Sujet : AGRONOMY

Résumé : Improving total carotenoids content (TCC) in cassava roots is an important strategy to reduce vitamin A deficiency in human populations that rely on cassava as a source of energy in their diets. The high heritability for TCC in the roots allowed the International Center for Tropical Agriculture to implement a rapid cycling recurrent selection approach that reduced the standard length of each cycle from the ordinary 8 yr to 3. Data from successive evaluation nurseries suggested that gains have been made through time. However, no comparison of different cycles of selection has been made when representatives of each cycle were grown together. This study compares 4 to 5 clones representative of cycles of selection from 2004 to 2009. Results demonstrated significant gains for TCC as well as for total [Beta]-carotene (TBC) expressed both in a fresh and dry weight basis. Although dry matter content (DMC) was not a selection criterion during the selection process, it increased with the successive cycles of selection. This suggests that indeed, simultaneous gains for TCC, TBC, and DMC are feasible. This finding is relevant for the important ongoing efforts at the International Institute of Tropical Agriculture and African National Programs to release biofortified cassava clones in Africa with adequate levels of dry matter content.

Mots-clés Agrovoc : manioc, Manihot esculenta, sélection récurrente, clone, caroténoïde, composition chimique, complémentation, teneur en vitamines, racine

Mots-clés géographiques Agrovoc : Colombie

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

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Ceballos Hernan, CIAT (COL)
• Morante Nelson, CIAT (COL)
• Sanchez Teresa, CIAT (COL)
• Ortiz D., CIAT (COL)
• Aragon Isabelle, CIAT (COL)
• Chávez A.L., CIAT (COL)
• Pizarro Monica, CIAT (COL)
• Calle Fernando, CIAT (COL)
• Dufour Dominique, CIRAD-PERSYST-UMR Qualisud (COL) ORCID: 0000-0002-7794-8671

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570799/)

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