Summary
Associated with each environment in a variety trial is an environmental effect, locatable on some linear scale. The distribution f(e) denotes the long-term distribution of effects, and the function g(e) describes die expected response of a variety to a change in the environment. The value of practical interest for any one variety is
µg = ∫g(e)f(e)de,
the expected value of g(e) over all environments. Methods of estimating µg are discussed, both when f(e) is known and when only a limited set of effects is available. It is shown that in the latter case it is necessary to make restrictive assumptions concerning g(e). An example involving wheat grain yield illustrates a situation in which the proposed analysis would be of advantage.
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Pederson, D. The stability of varietal performance over years. Heredity 33, 217–228 (1974). https://doi.org/10.1038/hdy.1974.88
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DOI: https://doi.org/10.1038/hdy.1974.88
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