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
Rutgers, the State University of New Jersey and Mountain View Seeds, Ltd.
Lolium perenne L. · Perennial ryegrass
Pennington Seeds Inc
Lolium perenne L. · Perennial ryegrass
Peak Plant Genetics, LLC & Rutgers, The State University of New Jersey
Lolium perenne L. · Perennial ryegrass
ZWAAN & DE WILJES
Lolium perenne L. · Perennial ryegrass
INTERNATIONAL SEEDS INC
Lolium perenne L. · Perennial ryegrass
Limagrain Genetics BV (NL)
Lolium perenne L. · Perennial ryegrass
Barenbrug Holland BV (NL)
Lolium perenne L. · Perennial ryegrass
DLF SEEDS A/S
Lolium perenne L. · Perennial ryegrass
DLF SEEDS A/S
Lolium perenne L. · Perennial ryegrass
Barenbrug Holland BV, 6501 BH Nijmegen
Lolium perenne L. · Perennial ryegrass
The State University of New Jersey - Rutgers (US)
Lolium perenne L. · Perennial ryegrass
DLF Trifolium A-S, DK
Lolium perenne L. · Perennial ryegrass
Dr. Feuerstein, Busch Heinrich,
Lolium perenne L. · Perennial ryegrass
Euro Grass Breeding GmbH Co. KG
Lolium perenne L. · Perennial ryegrass
Innoseeds B.V. (NL)
Lolium perenne L. · Perennial ryegrass
Limagrain Verneuil Holding (FR)
Lolium perenne L. · Perennial ryegrass
DLF-Seeds A/S
Lolium perenne L. · Perennial ryegrass
Theodorus P.M. op den Kamp
Lolium perenne L. · Perennial ryegrass
DLF-TRIFOLIUM DANSK PLANTEFORAEDLING
Lolium perenne L. · Perennial ryegrass
Pickseed USA, Inc. & Rutgers, The State University of New Jersey
Lolium perenne L. · Perennial ryegrass
PIET ARTS
Lolium perenne L. · Perennial ryegrass
International Seeds Inc. (US)
Lolium perenne L. · Perennial ryegrass
KWS SAAT SE and CO KGAA
Lolium perenne L. · Perennial ryegrass
Rutgers, The State University of New Jersey