Fig. 2
From: Resequencing and genome-wide association studies of autotetraploid potato
Selective sweep by genome-wide screening and functional annotations during domestication. Selective sweep regions revealed by the log2 ratio of nucleotide diversity (Π, upper), Pairwise fixation index (FST, middle) of Wild and CIP, and XP-CLR analysis of CIP and reported cultivars (bottom) on 12 chromosomes. Horizontal dashed lines (log2 πWild/πCIP = 2.07, FST = 0.75, or XP-CLR = 1%) indicate the genome-wide threshold of selection signals. The higher the Πvalue, the greater the difference between two groups. Possible homologous genes of Arabidopsis related to domestication traits mentioned in the text were shown at the selected regions of the whole chromosome (upper). Pairwise fixation index (FST) in 20-kb sliding windows across 12 chromosomes revealed the differentiation degree between Wild and CIP subpopulations. The higher the FST value, the higher degree of differentiation between two subpopulations (middle). XP-CLR scores in 20-kb sliding windows across 12 chromosomes revealed the differentiation between CIP and reported cultivars in the whole genome. The higher the XP-CLR score, the higher degree of differentiation between CIP and reported cultivars (bottom)