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  1. Vol. 11 No. 1, p. 64-66
     
    Received: June 12, 1970
    Published: Jan, 1971


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doi:10.2135/cropsci1971.0011183X001100010021x

Flax Cultivars with multiple Rust-conditioning Genes1

  1. H. H. Flor and
  2. V. E. Comstock2

Abstract

Abstract

Lines of seed.flax (Linum usitatissimum L.), each with a different gene for rust resistance, were developed by backcrossing to the cultivar ‘Bison.’ The monogenic Bison-like lines were intercrossed to provide two-gene segregates. Intercrossing two-gene lines, with one gene in comtnon, develnped three-gene lines. The selective pathogenicity of races of Melampsora lini (Ehrenb.) Lev., was utilized to identify plants that possessed the parental resistance genes. In a 3-year trim (1966–1968) at Fargo, North Dakota, yield differences between 20 multiplegene cultivars and five commercial cultivars were not significant. Most of the experimntal cultivars would be satisfactory for commercial production.

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