Figure 8.

Analysis of the LSA_ps Pool-Seq data. (A) Inferred relationship among the 12 Littorina populations represented by a correlation plot and a hierarchical clustering tree derived from the matrix $\Omega$ estimated under the core model (with $\rho =1$). Each population code indicates its geographical origin (SP, Spain; SW, Sweden; and UK, United Kingdom), its ecotype (crab or wave), and the replicate number (1 or 2). (B) SNP XtX (estimated under the core model) as a function of the $\mathrm{B}{\mathrm{F}}_{\mathrm{is}}$ for association with the ecotype population covariable. The vertical dotted line represents the 0.1% POD significance threshold (XtX = 28.1) and the horizontal dotted line represents the 20-dB threshold for BF. The point symbol indicates significance of the different XtX values, $\mathrm{B}{\mathrm{F}}_{\mathrm{is}}$ and $\mathrm{B}{\mathrm{F}}_{\mathrm{mc}}$ (AUX model) estimates. (C) SNP XtX corrected for the ecotype population covariable (estimated under the STD model) as a function of XtX estimated under the core model. The vertical and horizontal dotted lines represent the 0.1% POD significance threshold (XtX = 28.1). Point symbols follow the same nomenclature as in B. (D) Estimates of SNP regression coefficients (${\beta }_i$) on the ecotype population covariable (under the AUX model) as a function of XtX. Point symbols follow the same nomenclature as in B.