Biometrical Letters Vol. 56(1), 2019, pp. 59-70
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STABILITY EVALUATION OF OILSEED RAPE HYBRIDS IN UNREPLICATED TRIALS CARRIED OUT IN DIFFERENT LOCATIONS Bogna Zawieja1, Sylwia Lewandowska2, Tomasz Mikulski3, Wiesław Pilarczyk1 1Department of Mathematical and Statistical Methods, Poznan University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland, e-mail: bogna.zawieja@up.poznan.pl 2Wrocław University of Environmental and Life Sciences, Department of Genetics, Plant Breeding and Seed Production, Plac Grunwaldzki 24A, 50-363 Wrocław, Poland, sylwia.lewandowska@upwr.edu.pl 3Norddeutsche Pflanzenzucht Hans Georg Lembke KG, Hohenlieth, Germany |
An analysis is made of results from early stages of testing of promising hybrids. The data consist of single-replicate trials performed by Norddeutsche Pflanzenzucht in 6 locations (5 in Poland and one in Germany). In total 165 hybrids were tested with 3 standard varieties. The subject of the analysis was the seed yield. Three measures of stability were used. The yield of tested hybrids is expressed as percentage of that of standard varieties. Wricke’s ecovalence expressed as a contribution to G x E interaction was used as a measure of stability. Additional characterization of the tested hybrids was performed by regressing hybrid yield on the mean yields of the experiment, as described by Finlay and Wilkinson and by Eberhart and Russel. The methods applied enabled selection of the most promising hybrids for further yield testing.
breeding, ecovalence, standard varieties
