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Fertility and selection in tetraploid Lolium

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Abstract

Selection over five generations increased the fertility (seed set) in a population of tetraploid Lolium perenne from 67.57 per cent in the second (C 2) to 73.95 per cent in the seventh (C 7) generation. The increased fertility is associated with a high quadrivalent frequency and a low frequency of bivalents, trivalents and univalents. The high quadrivalent frequency in the selected population was achieved partly by a slight overall increase in chiasma frequency but mainly by a redistribution of chiasmata.

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Author notes

  1. J. G. Crowley

    Present address: Agric. Institute, Oakpark, Carlow, Ireland

Authors and Affiliations

  1. Department of Agricultural Botany, University College of Wales, Aberystwyth

    J. G. Crowley & H. Rees

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  1. J. G. Crowley
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  2. H. Rees
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Crowley, J.G., Rees, H. Fertility and selection in tetraploid Lolium . Chromosoma 24, 300–308 (1968). https://doi.org/10.1007/BF00336197

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  • DOI: https://doi.org/10.1007/BF00336197

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