The B. napus population in database comprises 3,707 B. napus accessions, including xxx from Asia, xxx from Europe, xxx from North America, xxx from South America, xxx from Oceania and xxx from Africa. Three ecotypes, including spring (xxx accessions), winter (xxx accessions) and semi-winter (xxx accessions), were included in the population. "Unknown" indicates that the ecotype or origin of the accession is unknown in previous reports.