Abstract
A survey of the frequency and distribution of radiate plants of Senecio vulgaris possessing capitula bearing self-incompatible ray florets was conducted in Edinburgh and its environs. Offspring were tested of 432 radiate plants sampled from a total of 12 different sites. Two sites were within 100 m of a site from which a sample of radiate plants had been taken previously by Warren et al. (1988) and reported to contain a radiate variant bearing self-incompatible ray florets at a frequency of 50 per cent. All of the radiate plants tested in the present study produced ray florets capable of setting selfed seed. In general, the percentage of seed set on selling was high in both ray and disc floret fractions (approximately 80 per cent), although in some capitula both floret fractions were characterised by poor seed set. The results failed to confirm the presence in Edinburgh populations of radiate S. vulgaris bearing self-incompatible ray florets.
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Abbott, R., Irwin, J. & Forbes, D. Absence of a radiate morph bearing self-incompatible ray florets from Edinburgh populations of Senecio vulgaris L.. Heredity 64, 391–393 (1990). https://doi.org/10.1038/hdy.1990.49
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DOI: https://doi.org/10.1038/hdy.1990.49