Registration of ‘Chisholm’ Summer-Dormant Tall Fescue

‘Chisholm’ (Reg. No. CV-102, PI 686938) summer-dormant (SD) tall fescue [Lolium arundinaceum (Schreb.) Darbysh.] is a forage-type, synthetic cultivar developed from phenotypic selections for persistence in southern Oklahoma and north Texas from the cultivar Flecha. Chisholm was jointly developed, tested, and released in 2016 by the Noble Research Institute, LLC, Ardmore, OK, USA, GENTOS, Buenos Aires, Argentina, and Grasslanz Technology, Ltd., Palmerston North, New Zealand. Chisholm tall fescue is a mediterranean or SD ecotype characterized by productive growth in mild winters and dormancy during hot and dry summers. Chisholm differs (p < 0.05) from the SD cultivar Flecha by possessing a later heading date (4 d) and a more erect growth habit. Plants of Chisholm have wider (p < 0.05) flag and tiller leaf widths of 0.4 and 0.8 mm, respectively when compared to plants of Flecha. When tested in small plot grazing trials for persistence in southern Oklahoma and north Texas from 2011 to 2016, final stands of Chisholm were 23% greater (p < 0.05) than Flecha and the mediterranean cultivar Prosper when averaged across all locations, which is the justification for Chisholm’s release. Chisholm is capable of producing high-quality pasture from autumn through spring, thereby providing a perennial forage option for livestock producers to complement or replace the planting of winter annuals such as dual-purpose wheat (Triticum aestivum L.). Chisholm is licensed to Warner Brothers Seed Company, Lawton, OK.

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