Fig. 4: Relationships among 30 exon-anchored homologous regions on the Z, Y, and W sex determination regions. | Nature Communications

Fig. 4: Relationships among 30 exon-anchored homologous regions on the Z, Y, and W sex determination regions.

From: Evolution of a ZW sex chromosome system in willows

Fig. 4

a Alignment of the exon regions (grey bars) with Y-associated SNPs across S. exigua and S. purpurea. The relative location of contig 511 is shown in green. b A phylogeny based on the concatenated exon regions shows that the Z and W chromosomes are derived from an ancestral Y. Bootstrap support > 70 is indicated.

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