Sidama Region Agricultural Research Institute (SIRARI), Hawassa Agricultural Research Centre, Hawassa, Ethiopia.
Ethiopian Institute of Agricultural Research (EIAR), Addis Ababa, Ethiopia.
PLoS One. 2024 Oct 25;19(10):e0310273. doi: 10.1371/journal.pone.0310273. eCollection 2024.
Orange-fleshed sweetpotato varieties that mature and harvest sooner play an important role in addressing food and nutrition demands in areas where irregular rainfall makes sustainable production challenging. A national variety trial was conducted in 2021 and 2022 during the main cropping season using ten OFSP genotypes in three locations in Sidama, South, and Oromia regions of Ethiopia, namely Hawassa, Arbaminch, and Koka, respectively. The objective of this study was to develop and select early-maturing and high-yielding OFSP genotypes for short-term harvesting (3-4 months). The field trial was conducted in a randomized complete block design with three replications. Data were collected on root yield and yield-related traits, sweetpotato virus disease reactions (SPVD), root dry matter (DMC), and beta-carotene contents (BCC) and were subjected to analysis of variance. A genotype plus genotype by environment interaction (GGE) bi-plot was also used to determine genotype stability. The results showed the presence of highly significant (p<0.001) differences among locations and genotypes, reflecting the existence of differential responses among genotypes in varied locations. Based on combined analysis, G3 (13NC9350A-9-3) outperformed the other genotypes for most of the traits considered, except for DMC, i.e., which has an equivalent to the check variety (Alamura) and showed a yield advantage of 41.4% over it. The GGE biplot also revealed that the G3 was the vertex genotype with the consistent performance in all environments. It had a low score of 1.39 on the 1-9 scoring scale, indicating that it falls within the resistant range, with adequate levels of BCC (5.5 mg/100 g) and DMC (30.0%). Furthermore, G3 is an early-maturing variety, which allows other crops to be grown in double and relay cropping systems. Therefore, based on its outstanding performance, G3 is recommended for verification and release for cultivation in mid- to low-land areas in Ethiopia.
橙色果肉甘薯品种的成熟和收获期更早，在降雨不规律导致可持续生产面临挑战的地区，对满足粮食和营养需求发挥着重要作用。2021 年和 2022 年主要种植季节，在埃塞俄比亚南部的锡达马、奥罗米亚地区的哈瓦萨、阿尔巴明奇和科卡三个地点进行了国家品种试验，使用了 10 个甘薯品种。本研究的目的是开发和选择早期成熟和高产量的甘薯品种，以便进行短期收获（3-4 个月）。田间试验采用完全随机区组设计，三次重复。收集根产量和产量相关性状、甘薯病毒病反应（SPVD）、根干物质（DMC）和β-胡萝卜素含量（BCC）的数据，并进行方差分析。还使用基因型加基因型与环境互作（GGE）双标图来确定基因型的稳定性。结果表明，地点和基因型之间存在高度显著差异（p<0.001），反映了基因型在不同地点的反应存在差异。基于综合分析，G3（13NC9350A-9-3）在大多数性状上优于其他基因型，除了 DMC，它与对照品种（Alamura）相当，产量比对照品种高 41.4%。GGE 双标图还显示，G3 是所有环境中表现一致的顶点基因型。它在 1-9 评分尺度上的得分仅为 1.39，表明它属于抗性范围，BCC（5.5mg/100g）和 DMC（30.0%）含量充足。此外，G3 是一个早熟品种，可以在双季和间作套种系统中种植其他作物。因此，基于其优异的表现，建议在埃塞俄比亚中低海拔地区进行验证和推广种植。
