NDLI: Variation in the breeding system of two sympatricDombeya species on La Réunion island

Content Provider	Springer Nature Link
Author	Humeau, L. Pailler, T. Thompson, J. D.
Copyright Year	1999
Abstract	The high frequency of dioecy on oceanic islands has attracted a great deal of attention in plant evolution. In this study we quantify variation in the breeding system of two sympatricDombeya species on La Réunion island. BothDombeya species are cryptically dioecious, each sex retaining non-functional morphological structures of the other sex. One species is strictly dioecious, whilst the other shows leaky dioecy, with 8/13 males producing fruit during two years of study. Males that set fruit did so following outcrossing but not after self-pollination despite the growth of self-pollen tubes in the style. This suggests the occurrence of a late-acting self-incompatibility system. Several morphologically intermediate individuals are recognized and suggested to be a result of interspecific hybridization. These purported hybrids are hermaphrodite and self-compatible, consistent with a complementary breakdown in dioecy and self-compatibility.
Starting Page	77
Ending Page	87
Page Count	11
File Format	PDF
ISSN	03782697
Journal	Plant Systematics and Evolution
Volume Number	218
Issue Number	1-2
e-ISSN	16156110
Language	English
Publisher	Springer-Verlag
Publisher Date	1999-01-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sterculiaceae Islands hybridization dioecy self-incompatibility Plant Ecology Plant Sciences Plant Anatomy/Development Plant Systematics/Taxonomy/Biogeography
Content Type	Text
Resource Type	Article
Subject	Plant Science Ecology, Evolution, Behavior and Systematics

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