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Characterization of commercial cultivars and naturalized genotypes of Stenotaphrum secundatum (Walter) Kuntze in Australia

Loch, D.S. and Roche, M.B. and Sun-Yue, J. and Arief, V. and Delacy, I.H. and Lambrides, C.J. (2009) Characterization of commercial cultivars and naturalized genotypes of Stenotaphrum secundatum (Walter) Kuntze in Australia. In: 11th International Turfgrass Society Research Journal: 2009 International Turfgrass Research Conference. Santiago, Chile. International Turfgrass Society, pp. 549-561.

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Publisher URL: http://www.turfsociety.com/
Organisation URL: http://www.deedi.qld.gov.au/
Organisation URL: http://www.horticulture.com.au/

Abstract

Stenotaphrum secundatum (Walter) Kuntze, known as "St Augustinegrass" in the USA and "buffalo grass" in Australia, is a widely used turfgrass species in subtropical and warm temperate regions of the world. Throughout its range, S. secundatum encompasses a great deal of genetic diversity, which can be exploited in future breeding programs. To understand better the range of genetic variation in Australia, morphological-agronomic classification and DNA profiling were used to characterize and group 17 commercial cultivars and 18 naturalized genotypes collected from across Australia. Historically, there have been two main sources of S. secundatum in Austalia: one a reputedly sterile triploid race (the so-called Cape deme) from South Africa now represented by the Australian Common group naturalized in all Australian states; and the other a "normal" fertile diploid race naturalized north from Sydney along the NSW coast, which is referred to here as the Australian Commercial group because it has been the source of most of the new cultivars recently developed in Australia. Over the past 30 years, some US cultivars have also been introduced and commercialized; these are again "normal" fertile diploids, but from a group distinclty different from the Australian Commercial genotypes as shown by both DNA analysis and grouping based on 28 morphological-agronomic characteristics. The implications for future breeding within S. secundatum in Australia are discussed.

Item Type:Book Section
Funders:Horticulture Australia Limited.
Corporate Creators:QPIF, Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Horticulture Australia Limited, International Turfgrass Society, Horticulture and Forestry Science
Projects:HAL Project Report TU04013. Adaptation and management of Australian buffalo grass and alternative warm-season turfgrass cultivars for shade and water conservation.
Business groups:Agri-Science, Horticulture and Forestry Science
Additional Information:© International Turfgrass Society. Reproduced with permission.
Keywords:Stenotaphrum secundatum; St Augustine grass; DNA profiling; morphological-agronomic classification; genetic variation; breeding program; turf; turfgrass; soft-leaf buffalo grass; Australia.
Subjects:Plant culture > Lawns and turfgrasses
Plant culture > Lawns and turfgrasses > Varieties
Plant culture > Lawns and turfgrasses > Performance and management
Deposited On:06 Sep 2011 02:20
Last Modified:06 Sep 2011 02:47

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