Full TGIF Record # 310399
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/118895
    Last checked: 02/10/2020
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Meeks, Meghyn; Genovesi, Dennis
Author Affiliation:Texas A&M University System, Texas A&M AgriLife Research, Dallas, TX
Title:Shade tolerance of diploid and interploid hybrids of St. Augustinegrass
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Turfgrass management and ecology poster (includes student competition)
Other records with the "Turfgrass management and ecology poster (includes student competition)" Section
Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 118895.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Color evaluation; Cultivar evaluation; Diploids; Drought resistance; Genotypes; Gray leaf spot; Hybrids; Percent living ground cover; Shade resistance; Spodoptera frugiperda; Spring green-up; Stenotaphrum secundatum
Cultivar Names:Floratam; Palmetto; Raleigh; TamStar
Abstract/Contents:"At Texas A&M AgriLife-Dallas, we have generated embryo-rescue derived interploid (polyploid x diploid) hybrids of St. Augustinegrass (Stenotaphrum secundatum) in an attempt to combine shade tolerance from the diploid (2n = 2x = 18) germplasm and drought resistance from the polyploid germplasm. After testing across multiple years and environments, eight diploid and eighteen interploid hybrids were selected from space-plant nurseries for their enhanced drought resistance and advanced to a replicated drought trial in Dallas, TX. These genotypes were compared to commercial checks Floratam, Palmetto, Raleigh, and TamStar in 2015 and 2016 under a rainout shelter. After completion of the trial, the polypropylene roof was removed to promote recovery. Following spring greenup, a 75% shade cloth was installed, and plots remained covered for two years (2017 and 2018) to simulate evergreen tree coverage. Retention of green cover, color, and density as well as slower leaf extension rates are primary traits that characterize shade tolerant turfgrasses. Biweekly data collection occurred during the growing seasons in both years and included percent green cover through digital image analysis, visual quality, color, shoot density and leaf elongation rates between mowing events. Spring greenup, and damage from gray leaf spot (Pyricularia grisea) and fall armyworms (Spodoptera frugiperda) under shade were also rated. The combination of shade and 2017 winter conditions delayed greenup in 2018 and resulted in severe stand loss for some entries. However, most genotypes survived, and some expressed not only good spring greenup, but also shade tolerance with acceptable retention of green cover and quality. Results will be discussed in more detail and superior genotypes will be identified."
Note:This item is an abstract only!
"Poster #1614"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Meeks, M., and D. Genovesi. 2019. Shade tolerance of diploid and interploid hybrids of St. Augustinegrass. Agron. Abr. p. 118895.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=310399
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