‘Vavilov II’ Siberian wheatgrass [Agropyron fragile (Roth) Candargy] (Reg. No. CV‐30, PI 653686) was released by the USDA‐ARS, the U.S. Army‐Engineer Research and Development Center, Utah Agricultural Experiment Station, and the USDA‐NRCS. Vavilov II was developed for reseeding sandy soils on disturbed rangelands dominated by annual weeds as a result of severe disturbance, frequent fires, and soil erosion. Selection emphasis in Vavilov II was on seedling establishment and stand persistence. During the establishment year, Vavilov II had increased numbers of seedlings per unit area (m2) using a frequency grid than ‘Vavilov’ at Yakima, WA, Fillmore, UT, Dugway, UT, and Curlew Valley, ID. Vavilov II was more persistent than Vavilov at Yakima, WA, Fillmore, UT, Curlew Valley, ID, and Malta, ID. Foundation seed of Vavilov II is available through the Utah Crop Improvement Association and the University of Idaho Foundation Seed Program.
Yakima western yarrow (Achillea millefolium L.) germplasm (Reg. no. GP-8, PI 639271) was released on 12 Oct. 2004 by the USDA-ARS and the Utah Agricultural Experiment Station as a Source Identified Class (natural track) germplasm, which is eligible for seed certification under Association of Seed Certifying Agencies guidelines (AOSCA, 2001). Yakima was developed in cooperation with the United States Army Corps of Engineers-Engineer Research and Development Center and the Strategic Environmental Research and Development Program (SERDP) project to identify resilient plant characteristics and develop wear-resistant plant cultivars for use on military training lands. Yakima western yarrow is a multiorigin germplasm assembled to ensure adaptation over a broad range of ecological sites and provide a source of readily available seed. Yakima was evaluated under the experimental designation SERDP-select western yarrow. Yakima is a multi-origin germplasm generated by combining germplasm from multiple environments, each possibly with a different co-adapted gene complex, to enhance establishment over a range of semiarid ecosystems. Wildland seed (generation G0) was collected on 31 July through 2 Aug. 2000, from 27 locations representing seven different ecological sites, as classified by the USDA-Natural Resources Conservation Service, at the U.S. Army Yakima Training Center (YTC) at Yakima, WA. The collection locations had the following range of characteristics: annual precipitation (15-28 cm); surface soil texture (loam to sand); soil depth (15-183 cm); slope (1-30%); aspect (north, south, east, and west); and elevation (486-851 m). Land forms of the collection locations were foot hill, plain, canyon bottom, canyon summit, ridge top, canyon side, and bottom flat. Associated vegetation included bluebunch wheatgrass [Pseudoroegneria spicata (Pursh) A. Love], Wyoming big sagebrush (Artemisia tridentata Nutt. ssp. wyomingensis Beetel & Young), Sandberg bluegrass (Poa secunda Presl.), buckwheat (Eriogonum sp.), scabland sagebrush [Artemisia rigida (Nutt.) Gray], Cusick's bluegrass (P. cusickii Vasey), Idaho fescue (Festuca idahoensis Elmer), yellow rabbitbrush [Chrysothamnus viscidiflorus (Hook.) Nutt.], rubber rabbitbrush [Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird], phlox (Phlox sp.), needle and thread grass [Hesperostipa comata (Trin. & Rupr.) Barkworth], and Indian ricegrass [Achnatherum hymenoides (Roemer & J.A. Schultes) Barkworth]. Approximately 2000 seedlings from the wildland-collected G0 seed, equally representing all collection sites, were started in the green
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