Fig. 5
Genomic regions with strong selective sweep signals in wild and domestic duck populations. a Distribution of θπ ratios (θπ, Wild / θπ, Domestic) and FST values, which are calculated for 40-kb sliding windows in 10-kb steps. Data points in blue [corresponding to the top 5% θπ ratio distribution, where the log2 (θπ ratio) is 0.69, and the top 5% FST distribution, where Z(FST) is 1.86] were identified as selected regions for the domestic ducks. The selected genomic regions contained 1048 genes and are marked in red. b Violin plot of FST values and θπ ratio for duck genomic regions that have undergone strong selection versus the whole genome. The statistical significance was calculated by the Mann–Whitney U test. c Example of genes with strong selective sweep signals in domestic ducks. FST values, θπ ratios and Tajima’s D values are plotted using a 10-kb sliding window. The gray shaded areas were termed as regions with strong selective sweep signals for domestic ducks. Genome annotations are shown at the bottom (black bar, coding sequences (CDS); blue bar, genes)