In addition, several copies of conserved syntenic regions exist in Brassica, which supports the hypothesis that of the Brassica diploid species are evolved from a hexaploid ancestor.

• 芸薹属作物基因组内存在着多个拷贝的共线性区域, 支持二倍体芸薹属作物起源于多倍体祖先的假设。