Full TGIF Record # 269991
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Web URL(s):https://archive.lib.msu.edu/tic/its/articles/1977sup30.pdf
    Last checked: 03/17/2016
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Publication Type:
Content Type:Abstract or summary only
Author(s):Turgeon, A. J.
Author Affiliation:Dept. of Horticulture, University of Illinois, Illinois
Title:A contemporary approach to turfgrass variety evaluation
Section:Session 3
Other records with the "Session 3" Section
Meeting Info.:Munich, Germany: July 11-13, 1977
Source:International Turfgrass Society Program: III International Turfgrass Research Conference. 1977, p. 30.
# of Pages:1
Publishing Information:Munich, Germany: [International Turfgrass Society]
Keywords:TIC Keywords: Comparisons; Cultivar evaluation; Cultivar variation; Evaluative methods; Experimental design; Poa annua; Poa pratensis; Variety trials
Abstract/Contents:"The intraspecific variability of Kentucky bluegrass (Poa pratensis L.) and other turfgrasses has allowed the development of many cultivars and experimental selections that differ widely in their color, texture, density, environmental adaptation, disease susceptibility and other factors. The basis for efforts in turfgrass breeding and evaluation is that improvements in the characteristics and adaptation of a turfgrass reduces its dependency on cultural practices designed to compensate for specific weaknesses. A three-phase system of evaluation has been developed to determine the probable gains obtainable from the use of the improved cultivars. Phase I involves a comprehensive description of the performance of a cultivar maintained under a moderate intensity of culture. Data obtained include: color, texture, density, seasonal quality, spring green-up, seedhead development, thatching, tendency, mid-summer stress tolerance, fall growth vigor and color retention, and the incidence and severity of various diseases. In phase II studies, specific cultivars exhibiting potential for commercialization are planted and maintained under different mowing heights and fertilization regimes. Measurements are taken as in the Phase I evaluation. Results indicate the adaptation of cultivars across a broad spectrum of cultural intensities and also, help to determine the specific cultural requirements of each cultivar. Phase III evaluation refers to any specialized test designed to more precisely define the potential use of specific cultivars. Tests include: shade adaptation, pesticide tolerance, wear tolerance, relative competitive ability with annual bluegrass (Poa annua L.), rhizome regrowth potential following sod harvest, sod strength and sod rooting strength, protein and xanthophyll levels in clippings, and other measurements. Combining different turfgrass species and cultivars provides a turf with a broader genetic base than where single cultivars are planted alone. The presumed benefits of mixtures and blends include: better adaptation to local environmental conditions and a reduced potential for disease development. The disadvantages are: reduced uniformity of the turf and the eventual dominance of one component grass in some cases. Blends and mixtures are observed as in the Phase I evaluation. Careful comparison of blends and the individual cultivars planted alone reveals the compatability [compatibility] of specific grasses planted together and their stability over time."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Turgeon, A. J. 1977. A contemporary approach to turfgrass variety evaluation. Int. Turfgrass Soc. Annexe - Tech. Pap. p. 30.
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    Last checked: 03/17/2016
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