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Host plant control of the inheritance of dinitrogen fixation in the Pisum-Rhizobium symbiosis

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Summary

The contribution of the host plant genome in symbiotic dinitrogen fixation has received little attention. In examining more than two thousand samples from the USDA Plant Introduction Collection, host-determined genetic variation in dinitrogen fixation has been found. In genetic analysis of a mutant line of Pisum resistant to nodulation, two genes designated Sym 2 and Sym 3 have been detected; Sym 2 affects nodulation while Sym 3 influences fixation. The two genes segregate independently as dominant Mendelian characters. Effective symbiosis requires the presence of at least one dominant gene at each locus.

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Authors and Affiliations

  1. Prairie Regional Laboratory, National Research Council of Canada, S7N OW9, Saskatoon, Saskatchewan, Canada

    F. B. Holl

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  1. F. B. Holl
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Additional information

NRCC No. 146 96

Preliminary report of some of this data has been made at the International Symposium on Nitrogen Fixation. Pullman. Washington, June 1974.

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Holl, F.B. Host plant control of the inheritance of dinitrogen fixation in the Pisum-Rhizobium symbiosis. Euphytica 24, 767–770 (1975). https://doi.org/10.1007/BF00132916

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  • DOI: https://doi.org/10.1007/BF00132916

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