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Title: A hexaploid schedonorus arundianceus plant that possesses a lolium multiflorum cytoplasm usefull for producing rhizmatous hybrids

Author
item Kindiger, Bryan

Submitted to: Germplasm Release
Publication Type: Other
Publication Acceptance Date: 7/20/2018
Publication Date: 10/27/2020
Citation: Kindiger, B.K. 2020. A hexaploid schedonorus arundianceus plant that possesses a lolium multiflorum cytoplasm usefull for producing rhizmatous hybrids. Germplasm Release. 10,813,323.

Interpretive Summary: DH66OP represents a tall fescue population that possesses a L. multiflorum cytoplasm that induces or enhances rhizome formation in tall fescue. The DH66OP parental line DH66, was originally generated by hybridizing the dihaploid inducing line IL1 with Nanyro tall fescue and selecting for a Nanyro dihaploid recovery. Since tall fescue are generally a self-incompatible species, DH66 was open-cross-pollinated with a diverse array of tall fescue genotypes, producing the DH66OP population. DH66OP represents a broad based genetic stock that can enhance or induce rhizome formation across various genotypes when used as maternal breeding stock when there is an intent to produce rhizomatous tall fescue materials. The release of DH66OP should allow breeders to transfer the L. multiflorum cytoplasm to additional tall fescue genotypes and recover genotypes expressing rhizomes.

Technical Abstract: The Agricultural Research Service, U.S. Department of Agriculture announces the release of a hexaploid tall fescue (Lolium arundinaceum) genetic stock, DH66OP. DH66OP represents a new perennial, tall fescue grass forage genetic stock that exhibits the ability to produce rhizomes when utilized as the maternal parent in hybrids with other tall fescue genotypes. DH66OP possesses a L. multiflorum cytoplasm that can enhance and initiate rhizome formation in tall fescue genotypes that do not possess rhizomes. The DH66OP parental line DH66, was originally produced by hybridizing the dihaploid inducing line IL1 with Nanyro tall fescue and selecting for a Nanyro dihaploid recovery. Since tall fescue are generally a self-incompatible species, DH66 was allowed to cross-pollinate with a diverse array of tall fescue genotypes, producing the DH66OP population.DH66OP is a highly persistent, drought tolerant and highly rhizomatous genotype that can be utilized to transfer the rhizome inducing L. multiflorum cytoplasm to additional tall fescue genotypes that are recalcitrant toward expressing rhizomes.