Biological implications in cassava for the production of amylose-free starch: Impact on root yield and related traits

Karlström Amanda, Calle Fernando, Salazar Sandra, Morante Nelson, Dufour Dominique, Ceballos Hernan. 2016. Biological implications in cassava for the production of amylose-free starch: Impact on root yield and related traits. Frontiers in Plant Science, 7 (604), 8 p.

https://doi.org/10.3389/fpls.2016.00604

Article de revue ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total

Prévisualisation

Version publiée - Anglais
Utilisation soumise à autorisation de l'auteur ou du Cirad.
ACL Biological Implications in Cassava 2016.pdf
Télécharger (483kB) | Prévisualisation

Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : Cassava (Manihot esculenta, Crantz) is an important food security crop, but it is becoming an important raw material for different industrial applications. Cassava is the second most important source of starch worldwide. Novel starch properties are of interest to the starch industry, and one them is the recently identified amylose-free (waxy) cassava starch. Waxy mutants have been found in different crops and have been often associated with a yield penalty. There are ongoing efforts to develop commercial cassava varieties with amylose-free starch. However, little information is available regarding the biological and agronomic implications of starch mutations in cassava, nor in other root and tuber crops. In this study, siblings from eight full-sib families, segregating for the waxy trait, were used to determine if the mutation has implications for yield, dry matter content (DMC) and harvest index in cassava. A total of 87 waxy and 87 wild-type starch genotypes from the eight families were used in the study. The only significant effect of starch type was on DMC (p < 0.01), with waxy clones having a 0.8% lower content than their wild type counterparts. There was no effect of starch type on fresh root yield (FRY), adjusted FRY and harvest index. It is not clear if lower DMC is a pleiotropic effect of the waxy starch mutation or else the result of linked genes introgressed along with the mutation. It is expected that commercial waxy cassava varieties will have competitive FRYs but special efforts will be required to attain adequate DMCs. This study contributes to the limited knowledge available of the impact of starch mutations on the agronomic performance of root and tuber crops.

Mots-clés Agrovoc : Manihot esculenta, manioc, amylose, succédané d'aliment pour homme, amidon, teneur en glucides, rendement des cultures, analyse économique, propriété physicochimique, génotype, légume racine, expérimentation, mutation, performance de culture