Variety traits
Lolium perenne L.
The ability of perennial ryegrass to maintain viability and productivity when exposed to stress factors such as trampling, drought, salinity, and low temperatures.
In the reference 30 varieties crop Perennial ryegrass, where this is mentioned in the description.
To assess tolerance to trampling, wear simulators are used, measuring the percentage of green cover, turf quality on a 1–9 scale, and NDVI index values. Tolerance to grazing is determined through multi-year persistence trials—the ability of a cultivar to maintain population density within the sward under conditions of regular livestock grazing.
When assessing resistance to abiotic stresses, such as drought or salinity, both laboratory phytotests and field observations are used. The main indicators include root and shoot length, dry biomass, seedling vigor index, and physiological markers, including chlorophyll content and enzyme activity, such as catalase.
High tolerance of perennial ryegrass cultivars is characterized by a minimal decrease in quality, cover, or biomass relative to a standard under a specific stress impact. This trait directly affects sward longevity, the need for overseeding, aesthetic properties, and the functional purpose of the stands.
General information about the subject — on the page Tolerance.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Lolium perenne L. · Perennial ryegrass
DLF SEEDS A/S
Lolium perenne L. · Perennial ryegrass
Innoseeds B.V. (NL)
Lolium perenne L. · Perennial ryegrass
ZWAAN AND DE WILJES
Lolium perenne L. · Perennial ryegrass
DLF Trifolium A-S, DK
Lolium perenne L. · Perennial ryegrass
Pickseed USA, Inc. & Rutgers, The State University of New Jersey
Lolium perenne L. · Perennial ryegrass
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG. Herrn Dr. Martin Frauen / Wilbert Luesink
Lolium perenne L. · Perennial ryegrass
DLF-TRIFOLIUM DANSK PLANTEFORAEDLING
Lolium perenne L. · Perennial ryegrass
Barenbrug Holland BV (NL)
Lolium perenne L. · Perennial ryegrass
DEUTSCHE SAATVEREDELUNG AG
Lolium perenne L. · Perennial ryegrass
Force Limagrain SA (FR)
Lolium perenne L. · Perennial ryegrass
PEDER WEIBULL
Lolium perenne L. · Perennial ryegrass
DLF SEEDS A/S
Lolium perenne L. · Perennial ryegrass
Barenbrug Holland BV (NL)
Lolium perenne L. · Perennial ryegrass
Innoseeds B.V. (NL)
Lolium perenne L. · Perennial ryegrass
DLF Trifolium A-S, DK
Lolium perenne L. · Perennial ryegrass
Barenbrug Holland BV (NL)
Lolium perenne L. · Perennial ryegrass
RAGT 2N S.A.S
Lolium perenne L. · Perennial ryegrass
PURE SEED TESTING
Lolium perenne L. · Perennial ryegrass
DLF SEEDS A/S
Lolium perenne L. · Perennial ryegrass
PURE SEED TESTING
Lolium perenne L. · Perennial ryegrass
PURE SEED TESTING
Lolium perenne L. · Perennial ryegrass
DLF Trifolium A-S, DK
Lolium perenne L. · Perennial ryegrass
PURE SEED TESTING
Lolium perenne L. · Perennial ryegrass
Pickseed West Inc (US)