Agronomic performance of experimental white-fleshed sweet potato genotypes in commercial fields

ABSTRACT Selecting new sweet potato genotypes that are adapted to the soil, climate, and cultivation conditions of the producing regions is necessary. Thus, the objective of this work was to evaluate the agronomic performance of experimental genotypes of white-fleshed sweet potato in commercial fields, seeking to evaluate their potential as commercial cultivars. The experiments were carried out in the municipalities of Presidente Prudente, Emilianópolis, Tarabai, and Álvares Machado in São Paulo state. The randomized complete block design with five repetitions was used in the experiments, where the genotypes UZBD-L1-04 and UZBD-L5-29 were evaluated along with the controls Ligeirinha Paulista, Canadense, and INIA Arapey. The assessed traits were tuberous root total yield, number of commercial tuberous roots, commercial tuberous root yield, average mass of commercial tuberous roots, percentage of commercial tuberous root dry mass, soluble solids, resistance to pest-caused damage, root length, diameter, and appearance. UZBD-L1-04 performed better than the other genotypes (the average of environments for tuberous root total yield was 31.76 t/ha), showing great potential as a commercial cultivar for the studied region.

摘要：筛选适配产区土壤、气候与栽培条件的甘薯新基因型具有必要性。本研究旨在评估白肉甘薯实验品系在商品田中的农艺表现，以评价其作为商业栽培品种的潜力。实验于巴西圣保罗州总统普拉登特市（Presidente Prudente）、艾米利亚诺波利斯市（Emilianópolis）、塔拉拜市（Tarabai）及阿尔瓦雷斯·马查多市（Álvares Machado）开展。实验采用随机完全区组设计，设置5次重复，供试基因型包括UZBD-L1-04、UZBD-L5-29，以及对照品种Ligeirinha Paulista、Canadense与INIA Arapey。本研究评估的性状涵盖块根总产量、商品块根数量、商品块根产量、商品块根平均质量、商品块根干物质百分比、可溶性固形物含量、虫害抗性、块根长度、直径及外观品质。结果表明，UZBD-L1-04的表现优于其余供试基因型，其各试验环境下的块根总产量平均值为31.76 t/ha，在研究区域具备作为商业栽培品种的巨大潜力。