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Sampling localities for loblolly pine for the samples used to discover single-nucleotide polymorphisms (SNPs) and to associate SNP genotypes with phenotypes. (A) Sample localities with respect to the first climatic principal component (PC), which largely represents temperature-related variables and seasonal aridity. (B) Sample localities with respect to the second climatic PC, which largely represents precipitation-related variables. PVE, percentage of variance explained.
