Summary of study
Plants of 300 wild and landrace accessions from the National Plant Germplasm System (NPGS) and a collection at Rutgers University were tested in two field environments for winterhardiness (as measured by tiller survival) and other turf traits. The field environments were at Becker and St. Paul, MN. The traits measured were seedling vigor, tiller survival in 2005 and 2006, spring growth in 2005 and 2006, summer and autumn turf quality, color, leaf texture, crown rust incidence, growth habit and spreading vigor.
Hulke, B.S., E. Watkins, D. Wyse, and N. Ehlke. 2007. Winterhardiness and Turf Quality of Accessions of Perennial Ryegrass (Lolium perenne L.) from Public Collections. Crop Sci. 47:1596-1602. doi:10.2135/cropsci2006.10.0671
Data
Supplementary data from this study (available here) includes:
- Snow depths
- Air and soil temperatures
- Means for each the traits studied for each of the accessions and checks
- Ranked means for each of the traits
- Accessions separated by country of origin