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Gene trees inferred from the HV regions of SRK and SLG in B. rapa (A) and B. oleracea (B). The OTUs represent the registered names of S haplotypes. When the two duplicates in the same S haplotype are most closely related, the branch between them is emphasized in a thick line. The bootstrap values in percentiles (>50%) are also shown. The bar represents genetic distance estimated by amino acid sequences.
