Contrasting genetic variation and positive selection followed the divergence of NBS-encoding genes in Asian and European pears

Table 4 Summary of genetic variation and genes with signature of positive selection in different populations

Population	Number of significantly different SNPs¹	Number of non-synonymous SNPs^a	Number of genes having non-synonymous SNPs	Subpopulation	Genes having signature of positive selection^b
Asian	295	184	61	Wild	64
Asian	295	184	61	Cultivated	60
European	122	74	39	Wild	57
European	122	74	39	Cultivated	63

¹Significantly different SNPs means this SNP has significant (chi-square test p-value < 0.01) different alleles distribution between wild and cultivated groups. ^aNon-synonymous SNP means the significantly different SNP was also non-synonymous. ^bGenes with Ka/Ks ratio more than one were considered as having signature of positive selection in different populations

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