National Agricultural Research Organization, National Coffee Research Institute, Mukono, Uganda.
Department of Food Technology & Nutrition, Makerere University, Kampala, Uganda.
J Sci Food Agric. 2022 Feb;102(3):1225-1232. doi: 10.1002/jsfa.11460. Epub 2021 Aug 16.
The recently developed Robusta coffee wilt disease resistant (CWD-r) varieties in Uganda outperform the local landraces, both in yield and resilience. However, their uptake has been slow due to limited information on their cup worth. This study profiled the cup worth of the five most commonly grown CWD-r across the Lake Victoria Crescent, Western Mid-altitude farmland and Central Wooded Savannah agro-ecologies.
Significant correlations (P ≤ 0.05) were observed between soil nutrients and coffee bean size but this was not the case for biochemical and cup quality. The proportion of coffee beans retained on screen 15; minimum acceptable size through coffee commercial markets, ranged from 58.09% in Mukono to 92.49% in Mityana. Interestingly, the bean size of variety KR4 was hardly influenced by environmental variations, with portions of beans retained on screen 15 being relatively the same (80.30% Ibanda, 89.50% Mukono, 98.20% Mityana). Coffee cup quality for most of the varieties was scored as premium (70-79%) across three agro-ecologies, with the exception of KR4, which was scored specialty grade (≥80%). Coffee blends generated were used to make coffee products with specialty score (82.25%) and a distinctive aroma complex.
In this study, blends of CWD-r resulted in superior cup scores (76-82%). These findings show that CWD-r varieties have a high cup worth with potential for wide adaptation in Uganda's Robusta coffee growing agro-ecologies. Most importantly, variety KR4 has resilience across three agro-ecologies with a consistent high bean size and superior cup quality, making it a candidate variety for the market and breeding. © 2021 Society of Chemical Industry.
乌干达最近开发的罗布斯塔咖啡枯萎病抗性（CWD-r）品种在产量和弹性方面均优于当地的地方品种。然而，由于对其杯测价值的信息有限，它们的采用速度一直很慢。本研究对维多利亚湖新月形、西部中海拔农田和中部林地萨凡纳五个最常见种植的 CWD-r 的杯测价值进行了分析。
观察到土壤养分和咖啡豆大小之间存在显著相关性（P≤0.05），但在生化和杯测质量方面并非如此。通过咖啡商业市场可接受的最小尺寸筛选保留的咖啡豆比例在 Mukono 为 58.09%，在 Mityana 为 92.49%。有趣的是，KR4 品种的咖啡豆大小几乎不受环境变化的影响，保留在屏幕 15 上的豆部分相对相同（Ibanda 为 80.30%、Mukono 为 89.50%、Mityana 为 98.20%）。大多数品种的咖啡杯测质量在三个农业生态区均被评为优质（70-79%），除了 KR4，其被评为特种等级（≥80%）。生成的咖啡混合物用于制作具有特种评分（82.25%）和独特香气复合物的咖啡产品。
在本研究中，CWD-r 的混合物产生了较高的杯测分数（76-82%）。这些发现表明，CWD-r 品种具有较高的杯测价值，在乌干达的罗布斯塔咖啡种植农业生态区具有广泛的适应性。最重要的是，KR4 品种在三个农业生态区具有弹性，其咖啡豆大小一致且具有较高的杯测质量，使其成为市场和培育的候选品种。 © 2021 化学工业协会。
