[ Influence des écorces des racines du Manioc (Manihot esculenta Crantz) sur le rendement économique ]
Bondonga Mambomba Hervé1
1 Centre de recherche de l’INERA Mvuazi, RD Congo
Original language: French
Copyright © 2026 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
A study carried out at the INERA Mvuazi research center aimed to assess the influence of peel content in fresh cassava roots in order to recommend optimal methods for selecting high-performance clones, thereby reducing post-harvest losses due to peel. The aim was also to determine the genetic variability of varieties under selection at IITA/INERA Mvuazi with regard to their peel content. The results revealed that peels influence fresh weight of peeled roots and dry yield, with variations ranging from 20% to 25% and 18% to 27% respectively at 12 and 15 months after planting (MAP). Significant genetic variability was observed for peel content at 15 MAP, where the Rav variety showed a lower percentage of fresh peel (17.50±0.7%) compared to the MVZ 2008/0330 (267.50±10.6%), MVZ 2008/002 (217.50±24.7%), and OBAMA (205.00±28.2%) varieties. Despite these differences, dry yields remained similar for all varieties. At 15 MAP, the ranking of varieties according to unpeeled fresh root weight changed significantly after peeling. The Rav variety achieved a fresh peeled root weight of 825.00±7.0 kg per ton of unpeeled root, outperforming the OBAMA (795.00±28.2 kg), MVZ 2008/022 (782.50±24.7 kg), and MVZ 2008/0330 (732.50±10.6 kg) varieties, the latter having the lowest weight. In conclusion, we recommend that breeders and processors give preference to the Rav variety for the development of high-performance clones and processing into by-products, in order to minimize post-harvest losses linked to peelings.
Author Keywords: Cassava, yield, genetic variability, peelings, varietal selection, post-harvest losses.
Bondonga Mambomba Hervé1
1 Centre de recherche de l’INERA Mvuazi, RD Congo
Original language: French
Copyright © 2026 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
A study carried out at the INERA Mvuazi research center aimed to assess the influence of peel content in fresh cassava roots in order to recommend optimal methods for selecting high-performance clones, thereby reducing post-harvest losses due to peel. The aim was also to determine the genetic variability of varieties under selection at IITA/INERA Mvuazi with regard to their peel content. The results revealed that peels influence fresh weight of peeled roots and dry yield, with variations ranging from 20% to 25% and 18% to 27% respectively at 12 and 15 months after planting (MAP). Significant genetic variability was observed for peel content at 15 MAP, where the Rav variety showed a lower percentage of fresh peel (17.50±0.7%) compared to the MVZ 2008/0330 (267.50±10.6%), MVZ 2008/002 (217.50±24.7%), and OBAMA (205.00±28.2%) varieties. Despite these differences, dry yields remained similar for all varieties. At 15 MAP, the ranking of varieties according to unpeeled fresh root weight changed significantly after peeling. The Rav variety achieved a fresh peeled root weight of 825.00±7.0 kg per ton of unpeeled root, outperforming the OBAMA (795.00±28.2 kg), MVZ 2008/022 (782.50±24.7 kg), and MVZ 2008/0330 (732.50±10.6 kg) varieties, the latter having the lowest weight. In conclusion, we recommend that breeders and processors give preference to the Rav variety for the development of high-performance clones and processing into by-products, in order to minimize post-harvest losses linked to peelings.
Author Keywords: Cassava, yield, genetic variability, peelings, varietal selection, post-harvest losses.
Abstract: (french)
Une étude menée au centre de recherche de l’INERA Mvuazi visait à évaluer l’influence de la teneur en épluchures des racines fraîches de manioc afin de recommander des méthodes optimales de sélection des clones performants, réduisant ainsi les pertes post-récolte dues aux épluchures. L’objectif était également de déterminer la variabilité génétique des variétés en sélection à l’IITA/INERA Mvuazi en ce qui concerne leur teneur en épluchures. Les résultats ont révélé que les épluchures influencent le poids frais des racines épluchées et le rendement sec, avec des variations allant de 20 % à 25 % et de 18 % à 27 % respectivement à 12 et 15 mois après plantation (MAP). Une variabilité génétique significative a été observée pour la teneur en épluchures à 15 MAP, où la variété Rav a présenté un pourcentage d’écorces fraîches plus faible (17,50±0,7 %) comparé aux variétés MVZ 2008/0330 (267,50±10,6 %), MVZ 2008/002 (217,50±24,7 %), et OBAMA (205,00±28,2 %). Malgré ces différences, le rendement en produits secs est resté similaire pour toutes les variétés. À 15 MAP, le classement des variétés selon le poids des racines fraîches non épluchées a changé de manière significative après épluchage. La variété Rav a atteint un poids frais de racines épluchées de 825,00±7,0 kg par tonne de racines non épluchées, surpassant les variétés OBAMA (795,00±28,2 kg), MVZ 2008/022 (782,50±24,7 kg), et MVZ 2008/0330 (732,50±10,6 kg), cette dernière ayant le poids le plus faible. En conclusion, nous recommandons aux sélectionneurs et transformateurs de privilégier la variété Rav pour le développement de clones performants et la transformation en sous-produits, afin de minimiser les pertes après récolte liées aux épluchures.
Author Keywords: Manioc, rendement, variabilité génétique, épluchures, sélection variétale, pertes post-récolte.
