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Fig. 3 | Avian Research

Fig. 3

From: Avian introgression in the genomic era

Fig. 3

The D-statistic considers ancestral (‘A’) and derived (‘B’) alleles across the genomes of four taxa. Under the scenario of incomplete lineage sorting without gene flow, two particular allelic patterns ‘ABBA’ and ‘BABA’ should occur equally frequent. An excess of either ABBA or BABA, resulting in a D-statistic that is significantly different from zero, is indicative of gene flow between two taxa. The table below shows the range of D-statistics for different bird taxa

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