Abstract Development of sweetpotato genotypes with enhanced nutritional composition is key to improve food and nutrition security and for industrial applications. The objective of this study was to determine the effect of genotype-by-environment interaction (GEI) on nutritional composition of sweetpotato clones to identify and select promising clones for large-scale production. Root dry matter content (RDMC), protein (Prot), β-carotene (β-car), iron (Fe), Zinc (Zn), starch (Star), sucrose (Suc), fructose (Fruc) and glucose (Gluc) contents were evaluated among 24 newly developed sweetpotato clones and one check variety across six diverse environments in southern Ethiopia using a 5 × 5 simple lattice design. Data was subjected to additive main effects and multiplicative interaction (AMMI) to estimate genotype (G), environment (E) and GEI effects. According to Gollob’s F-test and FR-test, four interactions principal component axis (IPCA) were significant (p ≤ 0.001) in the AMMI model for most traits, except glucose content where three and two IPCA’s were identified as significant by both tests. As a result, AMMI-4 was diagnosed for all traits, except glucose content where AMMI-2 was recommended. AMMI revealed significant (p ≤ 0.001) G, E and GEI effects on the studied nutritional traits. G explained 54 and 93 % of total variation for DRMC and β-car, respectively indicating these traits were less influenced by GEI effects. Larger E effects were observed for Prot (65 %), Fe (55 %) and Zn (64 %) while larger GEI effects were observed for Star (58 %), Fruc (77 %), Suc (50 %) and Gluc (56 %). Some of the newly-developed clones such as G5 (Ukrewe × Ogansagan-5), G6 (Resisto × Ejumula-7), G12 (Resisto × Temesgen-12), G13 (Resisto × Temesgen-14) and G22 (Ejumula × PIPI-19) with high RDMC (> 30 %), Prot (> 7 %), β-car (> 12 mg 100 g−1), Fe (> 2 mg 100 g−1), Zn (> 1 mg 100 g−1), Star (> 60 %), Fruc (> 4 %), Suc (>10 %) and Gluc (> 5 %) contents were selected for further evaluations for large-scale production, industrial use and and use in breeding programmes.

中文翻译：

---

新培育甘薯无性系营养成分的基因型-环境互作分析

摘要 开发具有增强营养成分的甘薯基因型是改善食品和营养安全以及工业应用的关键。本研究的目的是确定基因型与环境相互作用 (GEI) 对甘薯无性系营养成分的影响，以鉴定和选择有前景的无性系进行大规模生产。根干物质含量 (RDMC)、蛋白质 (Prot)、β-胡萝卜素 (β-car)、铁 (Fe)、锌 (Zn)、淀粉 (Star)、蔗糖 (Suc)、果糖 (Fruc) 和葡萄糖 (Gluc) ) 的含量在埃塞俄比亚南部六个不同环境中的 24 个新开发的甘薯克隆和一个检查品种中使用 5×5 简单格子设计进行评估。数据受加性主效应和乘性相互作用 (AMMI) 的影响，以估计基因型 (G)、环境 (E) 和 GEI 效应。根据 Gollob 的 F 检验和 FR 检验，AMMI 模型中大多数性状的四个相互作用主成分轴 (IPCA) 显着 (p ≤ 0.001)，但葡萄糖含量除外，其中三个和两个 IPCA 被两种测试确定为显着。结果，除了推荐 AMMI-2 的葡萄糖含量外，所有性状都诊断出 AMMI-4。AMMI 显示出显着 (p ≤ 0.001) G、E 和 GEI 对所研究的营养性状的影响。G 分别解释了 DRMC 和 β-car 总变异的 54% 和 93%，表明这些性状受 GEI 效应的影响较小。观察到 Prot (65 %)、Fe (55 %) 和 Zn (64 %) 的 E 效应更大，而 Star (58 %)、Fruc (77 %)、Suc (50 %) 和 Gluc ( 56%）。一些新开发的克隆如G5（Ukrewe × Ogansagan-5）、G6（Resisto × Ejumula-7）、