Abstract
Experimental populations were set up in the glasshouse in order to investigate the factors responsible for the increase in B-chromosome frequency between the seed and seedling stages of Allium schoenoprasum at the River Wye, Powys, S. Wales. Both the density of sowing (100, 250, 500 and 1000 seeds per pot) and the availability of moisture (normal, waterlogged and drought) were varied in the experimental system, which involved growing plants in small plastic multipots. Sowing density had no effect on the B-chromosome constitution of survivors, but the effect of moisure on the proportion of B-containing plants amongst the survivors was significant at the 5 per cent level. Moisture also had a significant effect on the proportion of non-standard B-types amongst the survivors. Drought conditions had the most pronounced effects, and the significance of this is discussed in relation to the conditions encountered by A. schoenoprasum at the River Wye.
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Holmes, D., Bougourd, S. B-chromosome selection in Allium schoenoprasum II. Experimental populations. Heredity 67, 117–122 (1991). https://doi.org/10.1038/hdy.1991.70
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DOI: https://doi.org/10.1038/hdy.1991.70
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