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The Importance of Flowering Time and Flower Number in the Relative Fitness of Males and Hermaphrodites in Datisca glomerata (Datiscaceae)
Author(s) -
SPENCER STANLEY C.,
RIESEBERG LOREN H.
Publication year - 1995
Publication title -
plant species biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 36
eISSN - 1442-1984
pISSN - 0913-557X
DOI - 10.1111/j.1442-1984.1995.tb00123.x
Subject(s) - biology , selfing , hermaphrodite , outcrossing , inbreeding depression , gynodioecy , pollen , mating system , sex allocation , inbreeding , population , outbreeding depression , fecundity , ecology , sex ratio , zoology , mating , demography , dioecy , sociology
The persistence of male plants in androdioecious populations of Datisca glomerata requires a large theoretical increase in male fertility of male plants over hermaphrodites. Recent studies have supplied evidence that high outcrossing rates, inbreeding depression, and high male pollen production per flower contribute to increased male fitness in this species. We tested for the contribution of increased flower number and early flowering to a male fitness advantage. Flower number was not found to differ significantly among male and hermaphrodite siblings, but males flowered significantly earlier. Flowering time was influenced also by population and family of origin.