Samples of 50-100 seeds are distributed to users for the purpose of food and agriculture under the terms of the standard material transfer agreement (sMTA). Plant breeding companies and research institutes are amongst the most frequent users of CGN’s lettuce collection.

Between 1985 when CGN was established and July 2013, a total number of 26,165 Lactuca seed samples have been distributed for external use, corresponding to an average of over 900 accessions per year and to 11 times the current collection size. Until July 2013, the use of CGN accessions was reported in 112 published papers, mostly related to plant breeding or genetic resources management.