The CGN forages collection consists at present of 966 accessions of 13 different species: 11 grass species with 703 accessions and two clover species with 263 accessions.
The grass species were received from the former Foundation of Agricultural Plant Breeding (SvP), private breeding firms from The Netherlands (Van Soest and Boukema 1995) and from the collections of Plant Variety Research. Most of the clover accessions were collected by CGN in the Netherlands from 1985 to 1986 (Van Soest and Dijkstra 1986, 1998). The accessions of T. repens were collected in all provinces of the Netherlands. Exploration missions were organised to Uzbekistan (1997, 1999) and Kyrgyzstan (1999). During these missions around 60 forage accessions were collected (Van Soest 1998).
The CGN grasses collection consists predominantly of economical important forage grasses cultivated in N.W. Europe. The Lolium collection, including accessions of perennial and Italian ryegrass, forms with 398 accessions the most important collection. This collection includes besides modern cultivars also old cultivars and ecotypes collected in old Dutch pastures.