Public domain
Plant breeders' rights are granted for a limited term. Upon expiration, the variety enters the public domain: its seeds can be propagated and sold without the rights holder's license.
Recent years are the most sought-after: the variety is free to use but still in production.
Cucumis sativus L. · Cucumber
Helianthus annuus L. · Sunflower
Dekalb Genetics Corporation
Brassica oleracea L. (White Cabbage Group) · White cabbage
Spinacia oleracea L. · Spinach
Festuca rubra L. · Red fescue
Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn
Glycine max (L.) Merr. · Soybean
Lactuca sativa L. · Lettuce
Medicago sativa L. · Alfalfa
Agrostis capillaris L. · Common bent
Triticum aestivum L. · Bread wheat
Brassica oleracea L. (Kohlrabi Group) · Kohlrabi
Brassica oleracea L. (White Cabbage Group) · White cabbage
Brassica napus var. napus · Rapeseed
Serasem (FR)/Institut National de la Recherche Agronomique (FR)
Lactuca sativa L. · Lettuce
Phaseolus vulgaris L. · Common bean
Cucumis sativus L. · Cucumber
Hordeum vulgare L. · Barley
Solanum lycopersicum L. · Tomato
Phleum nodosum L. · Small-leaf timothy
Helianthus annuus L. · Sunflower
Trifolium repens L. · White clover
Apium graveolens L. var. rapaceum (Mill.) Gaud. · Celeriac
Linum usitatissimum L. · Common flax