Yield Stability of East African Highland Cooking Banana ‘Matooke’ Hybrids

East African banana ( Musa sp.) breeding efforts have focused mainly on enhancing ‘Matooke’ productivity through the development of high-yielding, pathogen-resistant cultivars with adequate stability to contribute regional food security. Before a program can recommend promising for release, they must pass sensory screens; be evaluated in target population environments; and data analyzed yield, adaptability, stability. Twenty-four primary secondary triploid hybrids [NARITA (N)] derived from bananas, six local cultivars, one exotic cultivar were their across region at three highland sites Uganda’s western central regions, as well Tanzania’s northeastern southern highlands 2016–19. A randomized complete block design four replicates was used multisite trials. The mixed-model restricted maximum likelihood/best linear unbiased prediction approach, along additive main effect multiplicative interaction model biplots, dissect visualize genotype-by-environment patterns. Following likelihood ratio test, both genotype effects highly significant, confirming influence site heterogeneity selecting specific broadly adapted cultivars. N23 had greatest yield all associated adaptability stability, outperforming overall mean genotypes by 34.2%. In Tanzania, N27 (second), N7 (third), N18 (fourth), N4 (fifth), N12 (sixth), N13 (seventh); Uganda, N17 N2 N8 (seventh), (eighth), N24 (ninth) demonstrated good high yield. Furthermore, fungal pathogen Pseudocercospora fijiensis no significant P > 0.05) hybrids. As result, introduced into areas where black leaf streak constrains production significantly threatens farmers’ livelihoods. average potential ranged 9.7 24.3 t⋅ha –1 per year. best discriminating testing clones Lyamungo Tanzania Sendusu Uganda. Hence, these are recommended ideal examples locations superior genotypes.