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Analysis of competitive ability among genotypes of perennial ryegrass. I. Effect upon survival

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Summary

An analysis of the effects of competition upon the survival of three morphologically distinct genotypes of perennial ryegrass (Lolium perenne) in monocultures and the corresponding binary mixtures (duocultures), indicated that significant differences occurred between them in respect both of the pressures which they exerted and in their capacity to respond to these pressures. Response depended in this experiment upon cutting regime. This dependency is used to explain the rapid elimination of one of the genotypes from most of its duocultures under an infrequent but not under a frequent cutting regime. The implications of these results for survival in mixed pastures and for the ingress of weeds into such pastures are discussed briefly.

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Author notes

  1. P. D. S. Caligari

    Present address: Department of Agricultural Botany, Plant Science Laboratories, University of Reading, Whiteknights, RG6 2AS, Reading, UK

Authors and Affiliations

  1. Welsh Plant Breeding Station, SY23 3EB, Aberystwyth, Dyfed, UK

    J. Hill

  2. Department of Genetics, University of Birmingham, B15 2TT, Birmingham, UK

    Kenneth Mather

  3. Scottish Crop Research Institute, Pentlandfield, EH25 9RF, Roslin, Midlothian, UK

    P. D. S. Caligari

Authors
  1. J. Hill
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  2. Kenneth Mather
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  3. P. D. S. Caligari
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Hill, J., Mather, K. & Caligari, P.D.S. Analysis of competitive ability among genotypes of perennial ryegrass. I. Effect upon survival. Euphytica 36, 99–107 (1987). https://doi.org/10.1007/BF00730652

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  • DOI: https://doi.org/10.1007/BF00730652

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