Genotype by Environment Interaction of Potato Breeding Lines Developed for Central-Black Sea Region

Authors : Yasin Bedrettin Karan, Gungor Yilmaz

Pages : 32-40

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Publication Date : 2017-09-30

Article Type : Research

Abstract :This study was done as a part of the studies carried out on breeding potato varieties adaptable to central-north intersectional region. This study has been started in 2007, with about 20 thousand hybrid potato seedlings and as a result of clonal selection, 20 clones, performing excellent characteristics in terms of yield and quality characteristics, were subjected to the analysis of stability in terms of genotype x environment interactions. The study was conducted under Tokat-Niksar, Tokat-Kazova (2012-2013) and Tokat-Artova (between 2011-2012 and 2012-2013) conditions as a randomized complete block design with 3 replications in 8 different environments, as the year and location are accepted as an environment. In the study, four commercial varieties were tested as standards beside White, cream, light yellow and dark yellow clones. The data were subjected regression analysis.  Based on the Finlay-Wilkinson regression coefficients, some of the clones (A7-12, T5-4, T11-10, T5-14, A3-15, A3-167, and T10-8) which have better yield and quality characteristics than commercial varieties, showed good adaptation to specific environments while the clones (T6-28 and A3-234) had good adaptation to all the environments (Tokat-Niksar, Tokat-Kazova, and Tokat-Artova). Also in terms of dry matter, A13-1 has been identified as a clone with higher (28.4%) dry matter contents.
Keywords : Potato, Clone Selection, Solanum tuberosum, Breeding, Stability