Extended Data Fig. 4: Redundancy analysis (RDA) showing the candidate SNPs associated with top-ranking climate variables for 221 contemporary willow flycatchers breeding across the United States.
From: Historical DNA reveals climate adaptation in an endangered songbird
The loadings of 128,147 SNPs on (A) axes one and two and (B) axes one and three and their relationship with monthly mean dew point temperature (tdmean), monthly precipitation (precip), and monthly maximum temperature (tmax) are shown. Candidate SNPs (with loadings greater than three standard deviations from the mean) are coloured according to their associations, while non-candidate SNPs are shown in light grey.
