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This article in CS

  1. Vol. 27 No. 3, p. 606-607
    Received: July 14, 1986

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Method for Evaluating Germplasm Response to Chemical Treatment under Field Conditions1

  1. W. R. Deaton2 and
  2. P. N. Mascia2



The need for a method that rapidly and accurately evaluates germplasm for response to various chemical treatments while limiting costs led to the development of the technique described and used in this report. This technique involves screening genetic material in the field across several rates of the compound while minimizing space and labor inputs. The results of employing the technique in two experiments evaluating variation among 18 winter wheat (Triticum aestivum L.) cultivars for tolerance to both alachlor [2-chloro-2′-6′- diethyl-N-(methoxymethyl)acetanilide) and glyphosate [isopropylamine salt of N-(phosphonomethyl)glycine] herbicides are given. The method produced results that allowed the identification of significant variation among this small, random set of genetic material for tolerance to both the preemergence (alachlor) and the postemergence (glyphosate) herbicides examined. The space, seed, and labor requirements used were minimal compared to those that would be needed for a full-scale field trial of the 18 cultivars. The technique could also be modified to screen for response to a broad range of other plant growth regulators.

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