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Fig. 4 | Genome Biology

Fig. 4

From: Impacts of allopolyploidization and structural variation on intraspecific diversification in Brassica rapa

Fig. 4

The dominance of the LF subgenome during intraspecific diversification in B. rapa. a Gene density in the three subgenomes of the inferred B. rapa ancestral genome and Chiifu genome. The inferred B. rapa ancestral genome was constructed using the 18 genomes with A. thaliana as the reference. The Chiifu genome is used as a representative to illustrate intraspecies diversification in B. rapa. Gene density was calculated based on an ancestral karyotype of Brassiceae (AKBr). b The density of fractionated genes during the formation of the Chiifu genome. The x-axis indicates the seven inferred chromosomes of the inferred B. rapa ancestral genome based on AKBr. The y-axis indicates the ratio of fractionated genes to the genes in each bin of the inferred ancestral genome during the formation of the Chiifu genome. A 500-gene sliding window with an increment of two genes was adopted to calculate the gene density in a and b. The figure on the right shows the distribution of ratios of fractionated genes to the genes in each bin of the inferred ancestral genome, and the dotted line represents the average of these ratios in each subgenome

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