Evaluation of genotypic variation for cyanide, carotenoids and protein composition in the leaves of 178 cassava landraces uri icon


  • 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-beta-carotene and lutein concentrations in cassava leaves ranged from 346 to 7484 ppm dry basis (db), from 174-547 mu g g(-1) db and 15-181 mu g 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 100 g(-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.

publication date

  • 2021
  • 2020