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This article in CS

  1. Vol. 31 No. 4, p. 948-952
    Received: July 18, 1990

    * Corresponding author(s):
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Inheritance of Nonnodulating Mutants of Sweetclover

  1. J. E. Miller ,
  2. D. R. Viands and
  3. T. A. LaRue
  1. D ep. of Plant Breeding and Biometry, 252 Emerson Hall, Cornell Univ., Ithaca, NY 14853-1902
    B oyce Thompson Inst. for Plant Res., Tower Road, Ithaca, NY 14853-1801



Legume mutants defective in nodule formation are useful for understanding interactions between host and bacterium. Nonallelic nodulation mutants have been relmrted within only a few legume species. Inheritance of nonnodulation in 10 sweetclover (Melilotus alba Desr.) mutants was determined from F1, F2, and F3 generations derived from crosses between each mutant and the nodulating accession U389. Nonnodulation in each mutant was conditioned by a single recessive gene. Complementation analysis was performed on F1 and F2 seedlings derived from diallel crosses among the mutants. Five of the mutants were nonallelic, indicating that at least five different genes are involved in nodule formation in M. alba. The following symbols are proposed for the genes controlling nonnodulation of these sweetclover mutants: sym-1, sym-2, sym-3, sym-4, and sym-5.

Contribution of the Dep. of Plant Breeding and Biometry, New York Stage College of Agric. and Life Sciences, Cornell Univ., and Boyce Thompson Institute. Paper no. 799.

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Copyright © 1991. Crop Science Society of AmericaCopyright © 1991 by the Crop Science Society of America, Inc.