Evaluation of 17 sweet potato (Ipomoea batatas L.) genotypes across five environments for high yield and stability

The study was carried out in five regions of Bangladesh—Gazipur, Bogura, Jamalpur, Jashore, and Chattogram—utilizing a randomized complete block design and involving 17 genotypes of sweet potatoes. The objective was to evaluate the performance, environmental adaptability and stability on root yield. The analysis was carried out using fixed and random effects models. Results revealed that BARI Mistialu-12 had the highest storage root yield (45.35 t/ha). Among the locations, Bogura, (sandy loam soil), achieved the highest yield at 37.05 t/ha, followed by Jamalpur (36.15 t/ha), . The ANOVA showed significant variation in root yield across genotype (G), environment (E), and their interaction (GEI). Both the additive and multiplicative interaction effect models (AMMI) and a linear mixed model (LMM) confirmed substantial GEI…