ArticleTropical animal health and production2026
Spatial morphological diversity of the domestic grasscutter (Thryonomys swinderianus) populations in southern Benin.
Article in Tropical animal health and production, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
After 40 years of domestication of the grasscutter in Benin, the present study aimed to explore the role of the environment in the formation of morphometric measurements. Six linear body measurements were collected from a sample of 226 individuals randomly selected across the phytogeographic Districts of Pobè, Ouémè Valley, and Plateau. The NPAR1WAY procedure of the SAS software was performed to highlight the significant influence of the District factor on the variables tail length (TL), body length (BL), ear length (EL), and length of the left hind leg (LEG). The discriminant analysis permitted to retain three variables (BL, TL, LEG) which best discriminate the grasscutter populations. In the canonical discriminant analysis, the first two canonical variables were significant and represented 92.08% and 5.92% of the variability between the phytogeographic Districts, respectively. The discriminant function models correctly assigned more than 60% of grasscutter to their District of origin. Discriminant analyses revealed homogeneity between populations in the Plateau District and the Ouémè Valley, whereas a tendency toward differentiation was noted in the population from the Pobè District. Standardization of breeding practices could be at the origin of the phenotypic resemblance between populations in the Pobè and Ouémè Valley Districts. While molecular characterization is required to confirm these analyses, the study proposes implementing participatory programs that involve breeders in conservation decisions.
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