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This article in CS

  1. Vol. 7 No. 2, p. 125-130
    Received: Aug 12, 1966

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Genotype ✕ Environment Interactions in the Regional Testing of Soybean Strains1

  1. W. M. Schutz and
  2. R. L. Bernard2



Estimates of genotype ✕ environment interactions were obtained from seven regional Uniform Soybean Tests grown in 1954-56. All of the second order and nearly all of the first order interactions were significantly different from zero at the .05 level of probability. Estimates of the genotype ✕ year interactions were generally smaller than estimates of the genotype ✕ location interactions but in practice will have a greater effect on the error variance of a line mean, since testing over a long period of time is seldom done.

Evidence was cited to suggest that locations may be effectively substituted for years in regional tests to permit a rapid turnover of breeding material and that data from 10 to 15 locations in a single year should be sufficient to eliminate low-yielding strains.

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