Polymorphism for outcrossing frequency at the ray floret locus in senecio vulgaris L. I. Evidence

David F. Marshall, Richard J. Abbott

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

SUMMARY In two Edinburgh populations of Senecio vulgaris showing the ray floret poly-morphism, large differences in "female" outcrossing frequency were recorded between radiate and non-radiate plants. During peaks of flowering, radiate plants exhibited "female" outcrossing rates of between 13—20 per cent while the level of "female" outcrossing shown by "non-radiate" plants never exceeded one per cent. It is postulated that the possession of pistillate ray florets by capitula of radiate plants, leading to the occurrence of functional protogyny in such capitula, greatly boosts the outcrossing frequency of radiate plants relative to that of non-radiate plants. It is suggested that the polymorphism for outcross-ing frequency at the ray floret locus of S. vulgaris could be usefully employed as a "model situation" in studies aimed at improving our understanding of the maintenance of major gene variation for outcrossing frequency in plant popula-tions.
Original languageEnglish
Pages (from-to)227-235
Number of pages9
JournalHeredity
Volume48
Issue number2
DOIs
Publication statusPrint publication - 1982
Externally publishedYes

Fingerprint Dive into the research topics of 'Polymorphism for outcrossing frequency at the ray floret locus in senecio vulgaris L. I. Evidence'. Together they form a unique fingerprint.

  • Cite this