Genotype × Environment Interaction and Stability Analysis for Root Yield in Sweet Potato [Ipomoea batatas (L.) Lam]

Sweet potato breeding in Africa, more especially Nigeria, has mainly focused on improving productivity farmers' fields and fresh root consumption. In order to target the program, study was conducted estimate magnitude of genotype × environment interaction (G E) select stable high yielding sweet genotypes for yield Cylas severity two locations, identify most discriminating representative test environments Nigeria. The 41 were evaluated across diverse using a randomized complete block design (RCBD) with three replications. Data collected total number roots per plant, weight marketable yield, severity. data subjected analysis variance Generalized Linear Model procedure SAS 9.2 where treated as fixed factor replication random variable. Stability Genotype x Environment Interaction (GGE) bi-plot. Environment, genotype, G E variances highly significant ( p < 0.01) among assessed agronomic traits. Moreover, revealed differences genotypes, environments, effects all studied GGE biplot analyses identified promising genotypes—G13, G11, G14—that possess both mean stability, closest ideal performance consistency environments. This provides valuable information that could be utilized program ameliorate local clones