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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1998/61852,%20Penn%20State,%20Huff.PDF
Last checked: 10/18/2013
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Huff, David R. |
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| Author Affiliation: | Ph.D. and Department of Agronomy, The Pennsylvania State University, University Park, PA |
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| Monograph Title: | Cultivar Development of Greens-Type Poa annua L.: [1998 Annual Research Report], 1998. |
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| Publishing Information: | University Park, Pennsylvania: Department of Agronomy, The Pennsylvania State University |
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| # of Pages: | 8 |
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| Collation: | 2, 6 pp. |
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| Abstract/Contents: | "Annual bluegrass (Poa annua L.) makes up a large portion of the putting surfaces in many regions of the US and Canada. Given its wide-spread occurrence in the golf industry, there is currently a need for high quality, commercially available sources of greens-type P. annua for use in constructing, renovating, or maintaining P. annua golf greens. Greens-type P. annua actually has many characteristics that make them enviable as a putting surface. They typically have high shoot densities (9,000/dm2 or 7 to 24 times higher than that of bentgrass), an upright growth habit that lacks grain, and aggressively inhabit golf greens maintained at extremely close (ā¤1/8 inch) mowing heights. The purpose of this research is not to replace creeping bentgrass as a putting surface but rather to offer an alternative to those golf courses where P. annua is simply a better choice. I. Progress, Results, and Observations: Germplasm Collection and Evaluation: To date this project has collected over 2,500 samples of greens-type Poa annua from regions including the northeast US (Pennsylvania, New Jersey, Long Island NY) the mid-Atlantic (Delaware, Maryland, Virginia), and the Pacific northwest (Oregon, Washington). The performance and morphological features of field plot accessions are beginning to demonstrate that there is a tremendous amount of naturally occurring variation between regions, among golf courses within regions, and even among samples within a golf green. Field resistance to dollar spot disease was observed during summer/fall'98 in one particular accession collected from Long Island, NY. This particular accession was completely free of dollar spot disease while all other surrounding plots were moderately to heavily diseased. This disease occurred naturally and has not been chemically treated with fungicides. Currently, our collections of greens-type Poa annua exist as a collection of naturally occurring ecotypes and, as such, display a wide range of variation in many, many agronomically important traits. This variation is partitioned among individual plants due to its self-pollinated breeding systems and thus, is readily accessible through selection as distinct, uniform, and stable inbred lines. Initially, ecotypic and mass selection of elite germplasm will be used for the development of cultivars. As regional testing and evaluation begins to identify genetically superior strains, these elite strains will begin to serve as parental sources for the cross-hybridization and subsequent single line selection that will eventually result in improved commercial cultivars. Regional Testing: Based on the 1998 season plot evaluations, a renewed emphasis must begin to be placed on extensive regional testing. In order to enhance and expand this project's regional testing efforts, we have begun to identify cooperators willing to evaluate our experimental strains in golf green plots. Seed Production and Increase: Seed of the selected accessions were sown into seed production plots (approximately 5' x 20'), in Sep98, for further seed yield evaluation and for generation seed increase for further regional testing. We are expecting a reasonable, though limited, seed harvest for the summer of 1999. Genetic Identification and Manipulation of Polyhaploids: Poa annua's evolutionary history (allopolyploidy) suggests that observed sexual sterility of particular strains is likely due to the genetic state of these accessions being sterile polyhaploids (plants derived from an unfertilized, reduced egg). We have begun a set of experiments in an attempt to restore fertility to several sexually-sterile accessions." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article "Cultivar development and extreme temperature tolerance of greens-type Poa annua" 1998 Turfgrass and Environmental Research Summary [USGA], 1998, p. 46, R=61852. R=61852 |
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| Note: | Also appears as pp. 249-256 in the USGA Turfgrass Research Committee Reporting Binders for 1998.
"USGA Research Progress Report 1998"
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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Last checked: 10/18/2013
Requires: PDF Reader |
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