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Pounded yam: Scientific Report on Textural (extensibility) of yam population at CIRAD in Year 2025 at Guadeloupe

Arufe S., Ollier L., Domingo R., Baltyde M., Andypain S., Hubert O., Ayetigbo O.. 2025. Montpellier : CIRAD; RTB Breeding Project, 17 p..

In this report, the extensibility texture of 20 pounded yam samples produced from Dioscorea alata varieties in Guadeloupe in Year 2025 were reported. The pounded yam samples were produced under standard conditions and analysed for the extensibility texture using a Kieffer dough extensibility (KDGE) rig. Dry matter of the fresh yam tubers was also determined. Results showed that the KDGE parameters (extensogram peak force, extensibility and extension area) were discriminant, especially the Extensogram peak force textural parameter. The PCA and hierarchical clustering distinguished the extensibility among the genotypes. For instance, varieties such as Ti-Violet, A9, and A14 had high extensibility, while varieties such as 74F, Dou, A39 and Evolution had poor extensibility. No significant correlations was found between dry matter of fresh yam and the extensibility parameters. There were some similarities and differences between the spatial placements of the same genotypes analysed in both Years 2025 and 2024 on a PCA. These information may be useful for breeders in selection of varieties for breeding improved varieties with consumer-preferred quality, and to understand the effect of harvest years on the extensibility texture or DM of Guadeloupian yam genotypes.

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