Fig. 5: Genomic predictions of strong local adaptation occur in regions where cheatgrass is most dominant.
From: Local adaptation to climate has facilitated the global invasion of cheatgrass
a Geographic distribution of the genomic offset estimated for each invasive genotype (closed circles, n = 194). The genomic offset or maladaptation is the genetic distance between observed invasive genotypes and the genotype-environment predictions in the invaded range based on the native range genotype-environment association. Colors in the map indicate the degree of maladaptation, from low (purple) to high (yellow). b Histograms of the mean genetic distance (offset) of 1000 null permutations in western North America (WNA, n = 127) and eastern North America (ENA, n = 67), relative to their estimated mean genetic distance (red lines). c Within the Great Basin (polygon in a, n = 55), the mean genetic distance (offset) is significantly lower in areas where cheatgrass occurs in high (i.e., representing >15% vegetation cover) vs. low abundance; two-sided t-test p = 0.006 and two-sided permutation test p = 0.01. Boxplots indicate median (middle line), 25th, 75th percentile (box), and whiskers cover the data extent. Source data are provided in Supplementary Data 1.
