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This article in CS

  1. Vol. 18 No. 5, p. 840-844
    Received: Jan 30, 1978



Interaction of Near-isogenic Populations of Wheat in Infested and Uninfested Environments of Wheat Soilborne Mosaic Virus1

  1. B. N. Kayastha and
  2. E. G. Heyne2



Five resistant-susceptible populations of winter wheats (Triticum aestivum L.) and the susceptible cultivar ‘Eagle’ were grown in Kansas in 13 environments (uninfested or infested with soilborne mosaic virus) to evaluate their performance in different environmental conditions and to examine the usefulness of the regression approach for environments differing in a major known factor. All the populations evaluated in the infested and uninfested environments exhibited a wide range of stability-parameter estimates, and the individual mean yield was important for interpreting the regression coefficient and deviation from regression. At sites where environments differed in a major known factor, this approach seemed to describe satisfactorily and/or locate genotypes causing or contributing significantly to genotype ✕ environment interactions. Our data showed that cultivars with below unity regression coefficients would be preferable when selecting for disease resistance. The data also indicated that the ranking of environments may lead the breeder to an effective choice of environments to use for discriminating between genotypes with respect to particular sensitivities. The interaction of genotypes with wheat soilborne mosaic virus-infested or uninfested environments showed that breeding lines should be studied in more than one environment.

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