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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1993/Turfgrass/65319,%20U Minnesota, White.PDF
Last checked: 11/18/2013
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | White, Donald B.; Ascher, Peter; Kaerwer, Howard; Johnson, Paul; Velguth, Peter; Ellram, Alex; Cline, Van |
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| Author Affiliation: | White: Prinicpal Investigator; Ascher: Professor; Johnson and Ellram: Graduate Assistant; Cline: Graduate Student; Velguth: Dept. of Horticultural Science, University of Minnesota; and Kaerwer: Research Director, Retired, Northrup King Co., Inc. and Cooperator |
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| Monograph Title: | Improvement of Poa annua for Golf Turf: [1993 Annual Research Report], 1993. |
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| Publishing Information: | [Minneapolis, Minnesota]: Department of Horticultural Sciences, University of Minnesota |
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| # of Pages: | 15 |
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| Collation: | 15 pp. |
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| Abstract/Contents: | "Field evaluations of the five prime selections continued at the San Diego CC, Chula Vista, CA; "The Country Club", Brookline, MA.; Oswego CC, Oswego, OR.; and were expanded at the University of Minnesota. Mowing height varied from 1/8" to ½". Evaluations at all locations indicate that all selections continue to produce excellent turf. #42, #184, and #208 received the highest ratings at all locations. All overwintered well at all locations. Approximately 250 new accessions were added to the program. Twenty two (22) of these are diploid (2N=14 chromosomes) while the rest were normal tetraploid (2N=28) types. Some of the diploids produced flowers; all to date are sterile. Purported Poa infirma weed were acquired for crossing with Poa supina and P. annua. Subsequent growth and DNA analysis indicate that the material is probably an annual type of Poa annua. Crosses were completed to several selections and selfed seed was also collected for further evaluation. Seeded plots of progeny from crosses 42x117(F3; 42x184(F30; 42x1832(F4); 208x117/117(F3); 117x184(F3); 42x661(F3); 184x117(F3); & 184x234(F4) were initiated along with mixtures of #208, #42, 184, & 117. 2250 accessions were evaluated in the field space planting. 25 new crosses were executed for combining desirable characteristics. New materials with promise include 1 Poa supina (PS56-S3) which produced uniform, fine textured & dark green progeny. Interspecific crosses of P. supina X P. annua produced dark green, vigorous, rugged progeny. Flow cytometry has enabled us to conduct the large number of chromosome evaluations and identification of the 14 chromosome types. The 14 chromome [chromosome] P. annua plants are all fine textured and dense, with dark green color. Investigations at several golf courses reveal that up to 24% of the of P. annua samples collected from greens were 2N=14 chromosome types. No 14 chromosome types were found on either fairways or roughs. Low height of cut and other greens management foster the diploid types. Observations continue to support findings that seeded plantings are superior to sodded plantings. Variation in seed dormancy was observed. Experiments showed that seed of #184, #493, & #117 require a pre-planting, moist, cold treatment of 7 - 14 days to overcome dormancy. Otherwise 7-8 months in seed storage is required. Preliminary research indicated that inheritance of flowering habit acted like a simple, 1 gene inheritance system[.] Recent research indicate a more complicated model. Some P. annua types exhibit no flowering requirements, and contrary to the literature, some respond to photoperiod, and some types require cold indication, others respond to both photoperiod and cold. Experiments with gibberelic acid (GA) show that it enhances internode length. Preliminary work revealed that a timely GA treatment can enable removal of all flower heads with one mowing. This could change the way we manage P. annua on existing greens. Seed production operations continued at Pick Seed West in Tangent, Oregon. We now have enough seed to expand the field evaluation operations with larger plots and more sites. We have seed ready to plant to produce Breeder's seed that, hopefully, would be sufficient for planting foundation seed next year. Negotiations are still underway to make final arrangements for this planting. Negotiations also continue toward releasing the best materials to a commercial seed company for marketing the first seed by 1996 or 1997." |
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| Language: | English |
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| References: | 3 |
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| See Also: | See also related summary article "Improvement of Poa annua for golf turf" 1993 Turfgrass Research Summary [USGA], 1993, p. 22-23, R=65319. R=65319 |
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| Note: | Also appears as pp. 00066-00082 in the USGA Turfgrass Research Committee Reporting Binders for 1993.
"Progress Report #10"
"November 1993"
"Project: Biology and Utilization of Turfgrasses"
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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http://archive.lib.msu.edu/tic/rpr/1993/Turfgrass/65319,%20U Minnesota, White.PDF
Last checked: 11/18/2013
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Notes: Page 2 appears at end |
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