The breeding systems of Hicksbeachia pinnatifolia and Triunia youngiana (Proteaceae)

Goldingay, Ross and Bowen, Michiala (2003) The breeding systems of Hicksbeachia pinnatifolia and Triunia youngiana (Proteaceae). Cunninghamia, 8 2: 157-161.

Author Goldingay, Ross
Bowen, Michiala
Title The breeding systems of Hicksbeachia pinnatifolia and Triunia youngiana (Proteaceae)
Journal name Cunninghamia
ISSN 0727-9620
Publication date 2003
Year available 2003
Sub-type Article (original research)
Volume 8
Issue 2
Start page 157
End page 161
Total pages 5
Place of publication Sydney, Australia
Publisher National Herbarium of New South Wales, Royal Botanic Gardens, Kew
Language eng
Subject 06 Biological Sciences
0607 Plant Biology
Abstract The breeding systems of the rainforest shrubs Hicksbeachia pinnatifolia and Triunia youngiana were studied in north-east New South Wales, where the former is listed as a vulnerable species. Hicksbeachia pinnatifolia flowered in winter and spring, and produced an average of 36 inflorescences per plant with 155 flowers per inflorescence (5 580 flowers per plant). Inflorescences initiated and matured only a small number of fruits (c. 1–2 per inflorescence) in self-pollinated and open-pollinated treatments. This compared to about 17 fruits initiated and 4 fruits matured per inflorescence when cross-pollinated. Triunia youngiana flowered in spring and produced an average of 3 inflorescences per plant containing 23 flowers per inflorescence (69 flowers per plant). Plants were unable to initiate any fruit in autogamy and self-pollinated treatments. Plants in a cross-pollination treatment produced over three times as many fruit (3.5 matured per plant) compared to a control treatment (0.8 per plant), suggesting that plants were pollen-limited. Both treatments experienced substantial(80%) fruit abortion. These results indicate that Triunia youngiana is self-incompatible whereas Hicksbeachia pinnatifolia appears to be partially self-compatible.
Keyword Rainforest
Hicksbeachia pinnatifolia
Triunia youngiana
New South Wales
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Geography, Planning and Environmental Management Publications
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Created: Mon, 04 Jan 2010, 10:28:33 EST by Macushla Boyle on behalf of Faculty of Science