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Fig. 9 | BMC Evolutionary Biology

Fig. 9

From: Semi-permeable species boundaries in Iberian barbels (Barbus and Luciobarbus, Cyprinidae)

Fig. 9

Relationship between levels of introgression and genetic divergence between hybridizing species pairs. A negative correlation between proportion of introgressed alleles and genetic divergence between species is observed, indicating a decrease in gene flow with increasing genetic differentiation. Species pairs in increasing order of genetic divergence based on mitochondrial DNA (from [26]): L. bocageiL. comizo, L. comizoL. sclateri, L. microcephalusL. sclateri, L. comizoL. microcephalus

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