Fig. 4

Cluster analysis based on genetic similarity between B. rapa and B. napus varieties and F₁ hybrids. UPGMA cluster analysis was constructed using the PAST program. M1: “Nongxing 80 days,” M2: “Wansheng rape,” M3: “Edible rape,” P1: “Deza oil No. 18,” P2: “Gueiza No. 4,” P3: “Zhong oil No. 36,” P4: “Wan oil No. 25,” and P5: “FTHEB 1001”