The CROP QUALITY ASPECTS OF POTATO VARIETIES AND BREEDING CLONES IN ORGANIC FARMING SYSTEMS

Abstract

One of the indicators of quality is the starch content of the tubers. In order to evaluate the starch content for each genotype, the Institute of Agricultural Resources and Economics had set up a field trial in organic crop production system with 10 potato varieties and 10 breeding clones. A field trial was carried out in 2018-2020. The aim of the study was to evaluate and select potato varieties and clones with high starch content in the organic farming system.

The results proved impact of meteorological conditions on the starch content in the potato tubers. Starch content of varieties and clones varied from 12.68% to 20.63% on average in 3 years, significant impact of genotypes and years were observed (p<0.05). The highest starch content was found in 2019 for the variety ‘Kuras’ (21.32%) and for clones 19922.29 (21.0%) and 2008-6.5 (21.11%), also the following year these clones had a high starch content of (20.9%) and (21.17%), respectively. The high starch content in 2020 was also for the early varieties ‘Monta’ and ‘Rigonda’, ‘Prelma’ (21.17%). In 2018, many varieties and clones had a significantly lower starch content compared to 2019 and 2020 (p<0.05).