The B. napus population in database comprises 2,311 B. napus accessions, including 1,259 from Asia, 929 from Europe, 60 from North America, two from South America, 38 from Oceania and four from Africa. Three ecotypes, including spring (354 accessions), winter (756 accessions) and semi-winter (1,122 accessions), were included in the population. "Unknown" indicates that the ecotype or origin of the accession is unknown in previous reports.