Figure 3.
ZTRs identified in another two songbird lineages. (a) We detected ZTRs in great tit (Parus) and medium ground finch (Coerebinae). The red asterisks denote the origins of ZTRs. (b) The ZTR regions are highlighted by the vertical red bars, showing double female coverage and increased female SNP density. The grey bars highlight the PARs which have double female coverage but do not have increased female SNP density. The intact genes in the ZTRs are labelled near the red bars. (c) The ZTRs (transpositions) have significantly higher (Wilconxon rank sum test, p < 3.8 × 105) female SNP density than the rest of the Z chromosome and autosomes, or than the male SNP density, for both species.