Abstract
Abstract The objective of this study was to evaluate whether it is possible to obtain reliable estimates of yield stability of barley on the basis of single year trials. The stability was analysed by using some of the most common stability parameters. The other objective was to study the influence of variation between locations and years on the yield stability of barley under growing conditions in Finland. Barley breeder's trials of the Agricultural Research Centre of Finland from the years 1987-89 were used as material in this study. In each of these years six trials from different parts of Finland and six genotypes were analysed. Four parameters were used in analysis of yield stability: b i (Finlay & Wilkinson, 1963), s 2 d i (Eberhart & Russell, 1966), r 2 i (Pinthus, 1973) and environmental variance s 2 i. Each parameter was calculated from single- and multi-year results. The multi-year results were considered as reliable data with which to estimate yield stability. The reliability of the stability pa...
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