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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1994/35148,%20UGA,%20Duncan.PDF
Last checked: 11/13/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Duncan, R. R. |
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| Author Affiliation: | Principal Investigator, University of Georgia, Griffin, GA |
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| Monograph Title: | Development of Stress Tolerant Seashore Paspalum for Golf Course Usage: [1994 Annual Progress Report], 1994. |
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| Publishing Information: | Griffin, Georgia: University of Georgia |
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| # of Pages: | 19 |
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| Collation: | [1], 18 pp. |
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| Abstract/Contents: | "A 274-ecotype collection of Paspalum vaginatum Swartz has been assembled. During 1994, collection trips were made to Hawaii (34 ecotypes), Sea Island, GA (133 ecotypes), Jekyll Island, GA (2 ecotypes), Fort Pulaski, GA near Savannah (30 ecotypes), and Tybee Island, GA (6 ecotypes). Four accessions from Brazil and two from Israel cleared quarantine. The oldest known native seashore paspalums located in the U.S., thus far, are those from Sea Island, GA. The golf course on the island was initially built in 1925 and the grass was already established at that time. Possible collection sites for 1995 may include coastal regions in Florida, Alabama, Mississippi, Louisiana, Texas, and southern California. By 1 October 1994, over 3000 plots of seashore paspalum have been planted in Georgia, with about 2800 plots located in the Griffin area and 350 plots at Blairsville in North Georgia. Over 2200 tissue-culture-regenerated paspalums from six diverse ecotypes were planted in the field. We have collected data on a number of the somaclonal variants and will leave them exposed to winter cold temperatures in order to assess and hopefully select improved winterhardy genotypes. The winterhardiness (field survival) of seashore paspalum is apparently much higher that [than] is published in the literature, at least for some ecotypes. Adalayd supposedly is killed at 17°F, but I had Adalayd derivatives (Excalibre, Adalayd, Fidalayel), SIPV-2 (from Sea Island), and three accessions from Argentina (PI509018-1, PI509020, PI509022) to survive -3°F at Blairsville during 1993-1994. In general, the finer-textured turf types survived better than the coarse-textured types at both Griffin (+3°F) and Blairsville. An additional 124 ecotypes are being evaluated at Blairsville (1500 feet elevation) during 1994-1995. Additional winterhardiness evaluation and improvement has been initiated with calli and tissue-culture-regeneration plants using a cold chamber and modified bermudagrass (Taliaferro, Oklahoma State) cold shock-recovery protocol. Eighteen paspalum ecotypes are being evaluated on a USGA-specified green. The grass was mowed at ½-inch during the 1994 establishment (from sprigs) year and will be maintained at 5/32-inch with a greens mower during 1995. Additional plots have been established with B. J. Johnson for herbicide management studies to begin during 1995 and with Bob Carrow for fairway moisture utilization studies. Several genetic analyses techniques have been employed on seashore paspalum, including flow cytometry, random amplified polymorphic DNAs (RAPDs), restriction fragment length polymorphisms (RFLPs), and microsatellites. The techniques will be useful in assessing diversity/relatedness within the collection, in definitively fingerprinting ecotypes, and in genome mapping. Seashore paspalum is a sexual diploid (2N=20), but sexual incompatibility reduces viable seed production to 5% or less with most ecotypes. Some ecotypes have photoperiod or cool temperature (=< 60°F) requirements to initiate flowering. Several breeding techniques have been employed to enhance the production of viable seed." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article "Development of stress tolerant seashore Paspalum for golf course usage" 1994 Turfgrass Research Summary [USGA], 1994, p. 22-23, R=35148. R=35148 |
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| Note: | Also appears as pp. 00145-00164 in the USGA Turfgrass Research Committee Reporting Binders for 1994.
Summary appears as abstract.
"October 1994"
Tables |
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Last checked: 11/13/2013
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