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Vol.7 , No. 1, Publication Date: Feb. 14, 2020, Page: 17-24
 is a major food and cash crop, mainly grown by small-scale farmers in Uganda. The available potato varieties have not been evaluated for combined yield and processing tuber attributes. This study evaluated selected potato genotypes for specific processing tuber attributes with acceptable yield. Twenty one advanced clones and nine released varieties were evaluated for some biochemical properties. The field trial was laid out as a 5 X 6 alpha lattice design with three replications at Kachwekano research station. Results showed significant differences (P ≤ 0.01) among the genotypes for dry matter content that ranged from 16.49% to 21.85%. The best performing genotypes were 395438.1 (21.85%), 395096.2 (20.99%), 3950077.12 (20.97%). Reducing sugars were significantly different (P ≤0.001) among the genotypes and ranged from 0.4mg/g (db) to 11.3mg/g (db). The best performing genotype was 395438.1 (0.4 mg/g (db)). Genotypes were significantly different (P ≤ 0.001) for total tuber yield and yield components. The mean total tuber yield was 31.7tha<sup>-1</sup> with the highest yielding genotype being 392657.8 (50.4tha<sup>-1</sup>). Dry matter content and reducing sugars were negatively correlated (P≤ 0.05). Total tuber yield had positive correlation (P ≤ 0.001) to average weight per tuber, tuber weight per plant and (P ≤ 0.01) to number of tubers per plant. Among the genotypes evaluated there were genotypes that exhibited the desired levels of high dry matter content (≥20%) and low reducing sugars (≤3 mg/g) which could be exploited in variety release and potato improvement strategies basing on processing attributes.&picture=http://www.aascit.org/aascit/decorators/img/journal/892.jpg)
| [1] | Edgar Muhumuza, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda. |
| [2] | Richard Edema, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda. |
| [3] | Prossy Namugga, Kachwekano Zonal Agricultural Research and Development Institute, National Agricultural Research Organization, Kabale, Uganda. |
| [4] | Alex Barekye, Kachwekano Zonal Agricultural Research and Development Institute, National Agricultural Research Organization, Kabale, Uganda. |
Potato (Solanumtuberosum L.) is a major food and cash crop, mainly grown by small-scale farmers in Uganda. The available potato varieties have not been evaluated for combined yield and processing tuber attributes. This study evaluated selected potato genotypes for specific processing tuber attributes with acceptable yield. Twenty one advanced clones and nine released varieties were evaluated for some biochemical properties. The field trial was laid out as a 5 X 6 alpha lattice design with three replications at Kachwekano research station. Results showed significant differences (P ≤ 0.01) among the genotypes for dry matter content that ranged from 16.49% to 21.85%. The best performing genotypes were 395438.1 (21.85%), 395096.2 (20.99%), 3950077.12 (20.97%). Reducing sugars were significantly different (P ≤0.001) among the genotypes and ranged from 0.4mg/g (db) to 11.3mg/g (db). The best performing genotype was 395438.1 (0.4 mg/g (db)). Genotypes were significantly different (P ≤ 0.001) for total tuber yield and yield components. The mean total tuber yield was 31.7tha-1 with the highest yielding genotype being 392657.8 (50.4tha-1). Dry matter content and reducing sugars were negatively correlated (P≤ 0.05). Total tuber yield had positive correlation (P ≤ 0.001) to average weight per tuber, tuber weight per plant and (P ≤ 0.01) to number of tubers per plant. Among the genotypes evaluated there were genotypes that exhibited the desired levels of high dry matter content (≥20%) and low reducing sugars (≤3 mg/g) which could be exploited in variety release and potato improvement strategies basing on processing attributes.
Keywords
Dry Matter Content, Reducing Sugars, Potato, Uganda
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