Parallel evolution in experimental hybrid populations. a) Experimental hybrid populations were derived from a single BC₁ population. b) A principal component analysis of parental haplotype counts shows convergent evolution. Lighter points indicate individuals, while arrows indicate the change in mean value between generations. Hotter colors indicate samples from more advanced generations. c) Map of Texas displaying the location of the four populations. d) The percentage of variance in allele frequency change due to natural selection within the four parental haplotypes from generation 1 to 6 in four sites. The point indicates the measured value, while the line range covers the 95% CI from bootstrapping. Icons sourced from Flaticon.com.