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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1991/Turfgrass/29739,%20U%20Minnesota,%20White.PDF
Last checked: 12/09/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | White, Donald B. |
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| Author Affiliation: | Professor, Turfgrass Science |
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| Monograph Title: | Improvement of Poa annua for Golf Turf: [1991 Annual Research Report], 1991. |
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| Publishing Information: | [Minneapolis, Minnesota]: University of Minnesota |
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| # of Pages: | 22 |
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| Collation: | [22] pp. |
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| Abstract/Contents: | "The seed production field established in 1990 at Pickseed West in Tangent, Oregon was harvested in July of 1991. This seed was allocated so that a breeder's seed planting in Oregon and seeded golf course management plantings in Minnesota, at the San Diego CC, and on a golf course near Boston might be established. The Minnesota golf course management plantings were seeded in 5 X 10 foot plots on September 16. The breeder's seed planting was seeded on October 12. This included only the 5 best Poa annua selections. Seed from this planting will be harvested and used in 1992 to increase the breeder's seed supply and for more widespread evaluation of the selections. Emphasis is being placed on Poa annuas #42 (3A), #117 (10C), #184 (16B), #208 (18D), and #234 (21) for further evaluation, naming & introduction. 150 collections from 23 locations were added to the program. Selections #117 (10C) & #208 (18D) received the highest laboratory cold tolerance ratings while all 5 performed well over winter in the field. Several new selections and F1 hybrids continue to exhibit qualities that identify them for the next cycle of introductions. 2 selections exhibit truly exceptional qualities of color, density, and ruggedness. The ES-ME (excised stem - mist emasculation) technique has been fully employed in the planned crossing program and has enabled completion of many very difficult crosses this year. Seedling plants show more spreading vigor than vegetatively established plants. When progeny from the same parents were evaluated, stolons spread, on average, 1/3 more on first-year plants compared to those on vegetatively re-established second-year plants. This explains some of the success P. annua has in becoming established in opportunistic situations. Over 2000 offspring were evaluated. 50 different crosses were performed to develop F1 hybrids. Several superior hybrids were created that are uniform between plants. Several F2 hybrids also show promise with improved vigor, density, color, texture, uniformity. Selections #184 (16B) & #117 (10C) are superior parents for use in the production of desirable F1 hybrids. Interspecific crosses with P. annua (2n=28) & P. supina (2n=14) resulted, surprisingly, in fertile and promising progeny. Three distinct flowering types, day neutral, cold + short day (spring), and short day were identified. Some crosses segregated to a 3:1 ratio of seasonal to day neutral habit which may indicate a simple single gene, 2 allele system of inheritance for spring flowering types. This information will be extremely valuable for future breeding efforts. 14 year old P. annua seed germinated at 50%. This gives new dimension to the current poa seed bank in the soil. Cytogenetic analysis of our selections has substantiated that P. supina carries 14 chromosomes & P. annua normally carries 28. However, 4 of our poas, all of which are dense, dwarfish, dark green, desirable plant types have only 14 chromosomes (1/2 the expected number). This could open the door to much easier inheritance research with Poa annua & Poa supina. The project is on schedule for evaluation, seed production and introduction of 5 of the original 8 superior lines in the 1996-97 time frame. It is also on track for evaluation of 2nd cycle materials exhibiting superior qualities." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article "Improvement of Poa Annua var reptans for golf turf" 1991 Turfgrass Research Summary [USGA/GCSAA], 1991, p. 12, R=29739. R=29739 |
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| Note: | "#8, 1991"
Pictures, color
Tables |
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| Web URL(s):
http://archive.lib.msu.edu/tic/rpr/1991/Turfgrass/29739,%20U%20Minnesota,%20White.PDF
Last checked: 12/09/2013
Requires: PDF Reader |
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