Full TGIF Record # 211856
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Author(s):White, Donald B.; Ascher, Peter; Kaerwer, Howard; Johnson, Paul; Velguth, Peter; Ellram, Alex; Ruser, Karl
Author Affiliation:White: Principal Investigator and Professor; Ascher: Cooperator and Professor; Johnson and Ellram: Cooperator and Graduate Assistant; Velguth: Cooperator and Graduate Student, Cytology Project; Ruser: Cooperator and Project Scientist, Dept. of Horticulture Science, University of Minnesota; Kaerwer: Cooperator and Retired Research Director, Northrup King Co., Inc.
Title:Improvement of Poa annua for golf turf
Meeting Info.:January 27, 1993
Source:Research Committee Report for the 1993 Annual Members Meeting of the O. J. Noer Research Foundation. 1993, p. 1[48]-27[74].
# of Pages:27
Publishing Information:s.l.: [O. J. Noer Turfgrass Research Foundation]
Abstract/Contents:"The seed production field planting seeded in late October 1991 at Pickseed West in Tangent, Oregon was harvested in late June of 1992. Seed yields varied from almost 15 pounds for Poa annua #208 to a low of almost 5 pounds for #234. However, #234 was accidentally subjected to an herbicide application that severely damaged the planting. Projected estimates of seed production potential varied from 246 pounds per acres for Poa annua #42 to 800 pounds per acre for Poa annua #208. This seed was cleaned and will be allocated to selected golf course plantings and storage for use during the next growing season for seed production. Some of the seed was planted, in late October, in a new increase planting in Tangent, Oregon in preparation to accumulate enough seed for a breeder's seed planting in 1993. 315 New collections, including to foreign materials were introduced into the project in 1992. Several of the new materials carry stress resistance and a surprising number were found to be 14 chromosome types. Several male sterile plants were also identified during the evaluations. Poa annua #117, #184, #208, and PS#417 continue to exhibit cold tolerance. One new material that holds promise for a future introduction was found in the 3rd selfed generation of Poa supina #56-S3. Another resulted from an interspecific cross between Poa annua and Poa supine (PS79XPA19F). Observations continue to confirm that seeded plantings perform better than sod established plantings. Seeded plantings grew at a rate 1/3 faster than sodded plantings. Seed germination tests indicated a dormancy problem in some of the prime selections, particularly #117 and #184. Preliminary research showed that moist vernalization at 4C for as little as 5 days can overcome the after ripening requirement in the relatively new seed. Under normal seed storage conditions, the requirement was serviced after 7 months. Continuous flowering in Poa annua is a major problem on the golf course. Some off season flowering has been observed in some very desirable plants. Research with parental material, F1, F2, and F3 populations suggest that the flowering habit in Poa annua may be controlled by a single gene. Examination of segregating F2 and F3 progeny indicate a 3:1 ratio of continuous flowering to seasonal. Almost all of the perennial types in our breeding program exhibit a more seasonal flowering habit, flowering for a short time in the spring. We have found that most of the perennial materials possess the normal number of chromosomes (2N=28). However, a substantial proportion of our materials contain only the diploid number (2N-14). The 14 chromome plants are fine textured, dense, with dark green coloration. Flow cytometry research has been very successful and has enabled us to conduct the large number of chromosome evaluations that have allowed identification of the 14 chromosome materials. Golf course seeded plantings were established at the University of Minnesota turf research site; at the San Diego Country Club at Chula Vista, CA; and at "The Country Club" in Brookline, MA. Evaluations at both locations are showing differences, but all materials appear to be performing in excellent fashion. Efforts have been initiated to investigate appropriate steps to be followed for introduction of several of the prime selections as varieties by 1996 or 97."
Note:"Progress report #9: November 1992"
Executive summary as abstract
"Compiled by James J. Spindler, Agronomist and Research Director"
Pictures, b/w
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
White, D. B., P. Ascher, H. Kaerwer, P. Johnson, P. Velguth, A. Ellram, et al. 1993. Improvement of Poa annua for golf turf. Research Committee Report for the 1993 Annual Members Meeting of the O. J. Noer Research Foundation. p. 1[48]-27[74].
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