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 ^[1-4]. 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 ^[2-3].

[1] Wu, D., Liang, Z., Yan, T., Xu, Y., Xuan, L., Tang, J., Zhou, G., Lohwasser, U., Hua, S., Wang, H., et al. (2019). Whole-genome resequencing of a worldwide collection of rapeseed accessions reveals the genetic basis of ecotype divergence. Mol. Plant 12: 30-43.
[2] Song, J.M., Guan, Z., Hu, J., Guo, C., Yang, Z., Wang, S., Liu, D., Wang, B., Lu, S., Zhou, R., et al. (2020). Eight high-quality genomes reveal pan-genome architecture and ecotype differentiation of Brassica napus. Nat. Plants 6: 34-45.
[3] Tang, S., Zhao, H., Lu, S., Yu, L., Zhang, G., Zhang, Y., Yang, Q.Y., Zhou, Y., Wang, X., Ma, W., et al. (2021). Genome- and transcriptome-wide association studies provide insights into the genetic basis of natural variation of seed oil content in Brassica napus. Mol. Plant 14: 470-487.
[4] Lu, K., Wei, L., Li, X., Wang, Y., Wu, J., Liu, M., Zhang, C., Chen, Z., Xiao, Z., Jian, H., et al. (2019). Whole-genome resequencing reveals Brassica napus origin and genetic loci involved in its improvement. Nat. Commun. 10: 1154.