Full TGIF Record # 226405
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Web URL(s):http://www.ncwss.org/proceed/2005/proc05/abstracts/116.pdf
    Last checked: 07/31/2013
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Author(s):Auer, Carol
Author Affiliation:Assistant Professor, Department of Plant Sciences, University of Connecticut, Storrs, CT
Title:Biogeography of bentgrasses (Agrostis) in Connecticut
Section:Symposium: Crop gene flow
Other records with the "Symposium: Crop gene flow" Section
Meeting Info.:Kansas City, Missouri: December 12-15, 2005
Source:2005 North Central Weed Science Society Proceedings. Vol. 60, 2005, p. 116.
# of Pages:1
Publishing Information:Champaign, Illinois: North Central Weed Science Society
Keywords:TIC Keywords: Agrostis; Agrostis stolonifera; Evaluations; Gene flow; Geographical distribution; Herbicide resistance; Transgenic turfgrasses
Abstract/Contents:"The biogeography of bentgrasses had no practical significance until the recent concerns about gene flow from genetically-modified (GM) herbicide-tolerant Agrostis stolonifera (creeping bentgrass). Therefore, it is not surprising that there is no comprehensive source of information about the distribution of these grasses in the United States. A recent Federal Register notice asked for floristic assessments to understand the prevalence of Agrostis and its sexually compatible relatives. This study performed a rapid assessment of bentgrass species in Connecticut, a New England state with many urban/suburban areas and golf courses. The assessment of bentgrass species (Agrostis and related genera) used two approaches: 1) examination of approximately 600 herbarium specimens in the University of Connecticut Herbarium (Storrs, Connecticut) and the Yale Herbarium (New Haven, Connecticut), and 2) summer field studies in the northeastern region of Connecticut on public lands (e.g. roadsides, public golf courses, land trust conservation areas and town parks). The study revealed that Connecticut has nine bentgrass species with three species considered to be native to the state. Of the nine species in the flora, six bentgrass species have the potential to hybridize with A. stolonifera. There is gap in knowledge about gene flow for three species, including two native bentgrasses (A. perennans and A. hyemalis). The study demonstrated that three native Agrostis species are widely distributed, with A. perennans (upland bentgrass) the most common native bentgrass based on herbarium accessions (present in 45% of the towns in the state) and frequent identification in roadside flora. If herbicide-tolerant creeping bentgrass is used in Connecticut, there is potential for gene flow into some populations of native and introduced bentgrasses at a frequency that cannot be accurately predicted. A second important conclusion is that A. gigantea (redtop bentgrass) is a common introduced species and it can be found in some Connecticut wetlands. Gene flow is possible between A. stolonifera and A. gigantea, suggesting that herbicide-tolerant A. gigantea populations could develop in wetlands. Field studies in wetlands in the Connecticut River Valley revealed that A. gigantea and the invasive plant purple loosestrife can occur in the same site. In theory, if glyphosate herbicide were sprayed to kill the purple loosestrife, a population of herbicide-tolerant A. gigantea could survive and spread by rhizomes and seeds. Herbicide-tolerant A. gigantea could compete with desirable wetland plants and decrease future weed management options because there are very few herbicides labeled for wetlands. Therefore, it is possible that herbicide-tolerant bentgrass populations in Connecticut could impact land management in ways that are difficult to predict or quantify at this time."
Note:This item is an abstract only!
Geographic Terms:Connecticut
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Auer, C. 2005. Biogeography of bentgrasses (Agrostis) in Connecticut. Proc. North Cent. Weed Sci. Soc. 60:p. 116.
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    Last checked: 07/31/2013
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