Evaluating mutation breeding methods to fast-track the domestication of two Australian native Calandrinia species for ornamental horticulture

Harrison, D. K., Wickramasinghe, P., Johnston, M. E. and Joyce, D. C. (2010). Evaluating mutation breeding methods to fast-track the domestication of two Australian native Calandrinia species for ornamental horticulture. In: R.J. Geijskes, P. Lakshmanan and A. Taji, Proceedings of VIth International Symposium on In Vitro Culture and Horticultural Breeding. VI International Symposium on In Vitro Culture and Horticultural Breeding, Brisbane, Queensland, (85-90). 24-28 August 2008.

Author Harrison, D. K.
Wickramasinghe, P.
Johnston, M. E.
Joyce, D. C.
Title of paper Evaluating mutation breeding methods to fast-track the domestication of two Australian native Calandrinia species for ornamental horticulture
Formatted title
Evaluating mutration breeding methods to fast-grack the domestication of two Australian native Calandrinia species for ornamental horticulture
Conference name VI International Symposium on In Vitro Culture and Horticultural Breeding
Conference location Brisbane, Queensland
Conference dates 24-28 August 2008
Proceedings title Proceedings of VIth International Symposium on In Vitro Culture and Horticultural Breeding   Check publisher's open access policy
Journal name Acta Horticulturae   Check publisher's open access policy
Place of Publication Leuven, Belgium
Publisher International Society for Horticultural Science
Publication Year 2010
Year available 2009
Sub-type Fully published paper
ISBN 9789066055223
ISSN 0567-7572
Editor R.J. Geijskes
P. Lakshmanan
A. Taji
Volume 829
Start page 85
End page 90
Total pages 6
Collection year 2010
Language eng
Abstract/Summary There are about 50 Calandrinia (Portulacaeae) species native to Australia. These annual or perennial herbaceous succulents occur mainly in semi-arid regions. They tend to have attractive flowers. We are conducting plant improvement research on two Australian Calandrinia species with anticipated potential as ornamental flowering pot plants. Calandrinia sp. nov. (not yet fully classified) has large flowers (ca. 7 cm diam.) featuring concentric coloured ring patterns of bright violet, red, orange, and yellow in each flower. Calandrinia balonensis selections have smaller (ca. 4 cm diam.) pink/purple and sometimes white flowers. Being succulents, both species have relatively low water requirements. They are floriferous throughout the year. Neither species is currently available in the ornamentals industry. To enhance variation in our parent germplasm, the mutation breeding techniques of induced polyploidy by in vitro colchicine treatment of seedlings, and gamma irradiation of vegetative cuttings are being applied. These tools have demonstrated potential to quickly introduce desired horticultural traits, such as compactness, multiple branching, novel flower form, and brighter flower colours.
Subjects 820209 Ornamentals, Natives, Flowers and Nursery Plants
060702 Plant Cell and Molecular Biology
Keyword Chromosome number
Colchicine
Gamma irradiation
Tetraploids
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Tue, 20 Apr 2010, 14:30:43 EST by Kaye Hunt on behalf of School of Land, Crop and Food Sciences