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Cyanogenic, carotenoids and protein composition in leaves and roots across seven diverse population found in the world cassava germplasm collection at CIAT, Colombia

Ospina M.A., Pizarro M., Tran T., Ricci J., Belalcazar J., Luna J., Londoño L.F., Salazar S., Ceballos H., Dufour D., Becerra López-Lavalle L.A.. 2021. International Journal of Food Science and Technology, 56 (3) : p. 1343-1353.

DOI: 10.1111/ijfs.14888

The objective of this study was to characterise the nutritional potential of leaves and identify a diversity centre with low cyanide and high nutrient content among 178 Latin American cassava genotypes. This field-based collection, represents the seven diversity centres, held at The International Center for Tropical Agriculture (CIAT Palmira, Colombia) by the Cassava Program. The cyanide, all-trans-ß-carotene and lutein concentrations in cassava leaves ranged from 346 - 7484 ppm dry basis (db), from 174-547 µg.g-1 db and 15 - 181 µg · g-1 db respectively. Cassava leaves also showed significant levels of essential amino acids leucine, lysine, phenylalanine, valine and threonine, and average total protein content of 26.24 g · 100g-1 db. Among seven diversity centres, South American rainforest group showed low cyanide and high carotene content in leaves. In addition, VEN77 and PAN51 genotypes stood out for having low cyanide in leaves and roots and high carotene in leaves. This genetic diversity can be used to select high potential progenitors for breeding purposes.

Mots-clés : manioc; feuille; composition chimique; acide aminé; caroténoïde; protéine; glycoside cyanogène; valeur nutritive; amérique du sud

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