Trait-based clustering and environmental responsiveness of pro-vitamin a cassava genotypes via Finlay-Wilkinson regression

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dc.creatorBadewa, O.
dc.creatorParkes, E.
dc.creatorGana, A.
dc.creatorTsado, E.
dc.creatorTolorunse, K.
dc.creatorIluebbey, P.
dc.creatorAkpotuzor, P.
dc.creatorAyankanmi, T.
dc.date2025
dc.date2026-01-21T11:48:25Z
dc.date2026-01-21T11:48:25Z
dc.date.accessioned2026-06-27T16:06:11Z
dc.descriptionThis study evaluated the yield stability and environmental responsiveness of 42 pro-vitamin A cassava genotypes across multi-season trials using Finlay-Wilkinson (FW) regression and trait-based clustering approaches. Regression parameters-intercept and slope were used to quantify baseline yield potential and sensitivity to environmental variation, respectively. Hierarchical and k-means clustering grouped genotypes into three biologically distinct clusters with clear agronomic relevance. Cluster 2 genotypes exhibited moderate responsiveness and positive yield baselines, indicating broad adaptability and suitability for regional deployment. Cluster 3 showed high environmental sensitivity but low yield potential, suggesting limited resilience under marginal conditions. Cluster 1 comprised highly responsive genotypes with poor baseline productivity, reflecting unstable performance and strong genotype × environment interaction. One-way ANOVA confirmed significant differences among clusters for both slope (F(2,39) = 40.89, p < 0.001) and intercept (F(2,39) = 102.10, p < 0.001), validating the clustering structure. The dendrogram confirmed the cluster structure and provided a basis for selecting key genotypes. The results inform environment-specific breeding strategies and emphasize the importance of integrating multiple traits into future clustering approaches to improve cultivar selection accuracy.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/180287
dc.identifier.urihttp://hdl.handle.net/123456789/122585
dc.languageen
dc.rightsOpen Access
dc.sourceBadewa, O., Parkes, E., Gana, A., Tsado, E., Tolorunse, K., Iluebbey, P., ... & Ayankanmi, T. (2025). Trait-based clustering and environmental responsiveness of pro-vitamin A cassava genotypes via Finlay-Wilkinson regression. Crop Breeding, Genetics and Genomics, 7(4): e250014, 1-20.
dc.subjectcassava
dc.subjectgenotypes
dc.subjectyields
dc.subjectgenotype environment interaction
dc.subjectbreeding
dc.titleTrait-based clustering and environmental responsiveness of pro-vitamin a cassava genotypes via Finlay-Wilkinson regression
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)