Summary
Two basic concepts of phenotypic stability are distinguished: (i) a stable genotype should have a minimal variance under different environmental conditions (‘biological concept’), or (ii) a stable genotype should show minimal interactions with environments as measured by the ecovalence (‘agronomic concept’). In a study using field trial data of various crops it is shown that the widely used method of regressing the yield of a given genotype in the various environments on the respective means of all genotypes under test may be regarded as a combination of these two concepts, for coefficients of regression are almost perfectly correlated with variances, and mean squares for deviations from regression are almost perfectly correlated with ecovalences.
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Becker, H.C. Correlations among some statistical measures of phenotypic stability. Euphytica 30, 835–840 (1981). https://doi.org/10.1007/BF00038812
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DOI: https://doi.org/10.1007/BF00038812