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This article in CS

  1. Vol. 9 No. 2, p. 135-140
     
    Received: Feb 9, 1968
    Published: Mar, 1969


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doi:10.2135/cropsci1969.0011183X000900020006x

Classification of Environments to Control Genotype by Environment Interactions with an Application to Cotton1

  1. H. A. Abou-El-Fittouh,
  2. J. O. Rawlings and
  3. P. A. Miller2

Abstract

Abstract

Cluster analysis as a tool for classifying locations in order to minimize the within-cluster genotype by location interactions was discussed and applied to the data for lint yield per hectare in upland cotton (Gossypium hirsutum L.) obtained from the Regional Cotton Variety Tests for years 1960–1964. The distance coefficient, which was more efficient as a measure of similarity than the product-moment correlation coefficient in preliminary analyses, was used to study the zoning of the cotton belt. Some modifications in the currently recognized zones of adaptation for cotton were suggested.

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