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ARS Home » Pacific West Area » Logan, Utah » Forage and Range Research » Research » Publications at this Location » Publication #334223

Research Project: Develop Improved Plant Genetic Resources to Enhance Pasture and Rangeland Productivity in the Semiarid Regions of the Western U.S.

Location: Forage and Range Research

Title: Genes affecting heading date in cocksfoot (Dactylis glomerata)

Author
item Bushman, Shaun
item ZHAO, XINXIN - Sichuan Agricultural University
item Robbins, Matthew
item Robins, Joseph
item Larson, Steven
item ZHANG, XINQUAN - Sichuan Agricultural University
item XIE, WENGANG - Lanzhou University

Submitted to: Symposium Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 8/20/2016
Publication Date: 8/20/2016
Citation: Bushman, B.S., Zhao, X., Robbins, M.D., Robins, J.G., Larson, S.R., Zhang, X., Xie, W. 2016. Genes affecting heading date in cocksfoot (Dactylis glomerata). Symposium Proceedings.

Interpretive Summary:

Technical Abstract: Several genes cause well known effects on heading date in cool-season forages: Vrn1, Constans, and FloweringTime. Vrn1 is a MADs box transcription factor that is induced upon vernalization and necessary for flowering. Constans genes are induced upon long days in cool-season grasses and induce expression of FloweringTime. FloweringTime is a kinase inhibitor that induces flowering. The role of these genes in model grasses such as wheat, barley, Brachypodium distachyon, and perennial ryegrass has been confirmed through detection as QTLs or associations with heading date or flowering time. In the autotetraploid orchardgrass, non-bivalent pairing, gene dosage issues, and greater intra-plant allelic diversity greatly complicates both QTL mapping and candidate gene association. In this study we report on efforts to associate polymorphisms in three candidate genes and heading dates in a diverse cocksfoot population.