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United States Department of Agriculture

Agricultural Research Service

Research Project: INTEGRATING FORAGE SYSTEMS FOR FOOD AND ENERGY PRODUCTION IN THE SOUTHERN GREAT PLAINS Title: Notice of release of Syn1 Tall Fescue

Author
item Kindiger, Bryan

Submitted to: USDA, Agricultural Research Service, Cultivar Release
Publication Type: Other
Publication Acceptance Date: October 29, 2012
Publication Date: N/A

Interpretive Summary: Syn1 tall fescue is a plant germplasm release developed by Dr. Bryan K. Kindiger at the USDA-ARS, Grazinglands Research Laboratory, El Reno, OK 73036. Syn1 and its rust tolerant sub-population (Syn1RT) will have direct benefit to the development of heat and drought tolerant tall fescue cultivars in the Southern Plains and elsewhere. The Syn1 population, was developed by combining eight, genetically fixed lines into a synthetic population. The genetically fixed lines utilized in the breeding of Syn1 were developed through a novel gamete selection approach. Syn1 will have direct benefit to the development of heat and drought tolerant tall fescue cultivars in the Southern Plains and elsewhere. Syn1 may also be useful as cultivars on their own. Material of this release has been deposited in the USDA National Plant Germplasm System (http://www.ars grin.gov/npgs/) where it will be available for research purposes, including development and commercialization of new cultivars.

Technical Abstract: The Agricultural Research Service, U.S. Department of Agriculture announces the release of Syn1 tall fescue [Festuca arundinacea (syn., Lolium arundinaceum Darbyshire; Schedonorus phoenix (Scop.) Holub)] (PI xxxx, PI xxxx) germplasm developed by Dr. Bryan K. Kindiger at the USDA-ARS Grazinglands Research Laboratory, El Reno, OK 73036. Syn1and its rust tolerant sub-population Syn1RT are released by the USDA-ARS in 2012 to promote the utilization of endophyte-free tall fescue germplasm having strong tolerance to heat, drought and low nitrogen conditions. Syn1 possesses a Lolium multiflorum cytoplasm and is free of the toxic endophyte Neotyphodium coenephialum which has been identified as the cause of a fescue toxicosis syndrome sometimes suffered by livestock that graze the N. coenophialum-infected grass. This toxicity can lead to poor weight gain, elevated body temperature, reduced conception rates, rough hair coat, fat necrosis, loss of switch and ear tips, and lameness or dry gangrene of animal extremities. Syn1 will have benefit to the development of tall fescue cultivars in the Southern Plains region of the USA and elsewhere. Syn1 will have direct benefit to the development of heat and drought tolerant tall fescue cultivars in the Southern Plains and elsewhere. Syn1 was developed by combining eight dihaploid lines utilizing a novel gamete selection approach. Selected dihaploid lines were placed in a space-planted nursery isolation and allowed to intercross. Seed obtained from the intercross was again sown to an isolation nursery and recombined for one generation. Seed of Syn1 have been deposited in the USDA National Plant Germplasm System (http://www.ars grin.gov/npgs/) where it will be available for research purposes, including development and commercialization of new cultivars. It is requested that appropriate recognition be made if these genetic stocks contribute to research or the development of a new breeding line or cultivar.

Last Modified: 12/21/2014
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