Summary
The regression analysis developed by Finlay and Wilkinson to investigate genotype-environment interactions and to assess genotypes for their adaptation to a range of environments is reviewed. Their analysis used the mean yield of many genotypes to provide a measure of the environment; it was not measured in physical terms. To reveal aspects of their analysis it was applied to data of the response of genotypes to variation in a single precisely measured environmental factor. The conclusions were extended to consider variation in several environmental factors.
The effects on the regression statistics that occur with different samples of genotypes, sub- and super-optimal environmental conditions, differences in periods of growth, changes in the scale of measurement and the occurrence of several stress factors are outlined.
The study byBreese (1969) of genotype-environment interaction inDactylis glomerata is considered against a background of these effects.
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Knight, R. The measurement and interpretation of genotype-environment interactions. Euphytica 19, 225–235 (1970). https://doi.org/10.1007/BF01902950
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DOI: https://doi.org/10.1007/BF01902950