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Fig. 1 | BMC Genomics

Fig. 1

From: Mapping the genomic architecture of adaptive traits with interspecific introgressive origin: a coalescent-based approach

Fig. 1

Local genealogical variation: a sequence level view. The illustration shows an example outcome of evolution under the species phylogeny depicted in Fig. 2, where individual a is sampled from population A, individual b is sampled from population B, and individual h is sampled from population H. a A haploid genome sequence is shown for each of the three individuals. Different genealogies are observed for different genomic loci, depending on the specific coalescent history of each locus. Each locus is colored green or blue based on the topology of the genealogy at that locus. The ancestral and derived alleles are represented as 0 and 1, respectively. In our example, the locus marked with a dashed red box contains a causal SNP that contributes to the observed phenotype shown in (b). c Sample structure (or the evolutionary relationships between samples) in green loci differs from sample structure in blue loci. d In our example, global sample structure (i.e., sample structure measured across all sites) takes the form of a star tree. Notice that global sample structure differs from local sample structure in any single locus

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