Irrigation amount and ploidy affect the turfgrass potential of crested wheatgrass (Agropyron cristatum)

Crested wheatgrass (Agropyron cristatum [L.] Gaertn.) germplasm is available in tetraploid and diploid forms. In addition to rangeland revegetation and forage production, the tetraploid crested wheatgrasses also commonly provide low‐maintenance turfgrass production. It is unknown how well the smaller leaves and plants of the diploid form compare to the tetraploid form for turfgrass production. Herein, we describe the analysis and results from two line‐source irrigation studies to quantify the difference in turfgrass performance across irrigation levels for 10 crested wheatgrass population representing tetraploid and diploid levels. The results were based on growth habit, color, density and quality. We found differences among the trait values among the irrigation levels, among the populations and between the two ploidy levels. Overall, there is substantial variation within the crested wheatgrass germplasm for turfgrass production and quality. The diploid germplasm possesses excellent low‐maintenance turfgrass potential, particularly when greater aesthetics and quality are desired. However, the greater spread and rhizomatous growth habit present in some tetraploid populations suggest great potential for the tetraploid germplasm, particularly when soil stabilization is a primary concern.