I read the article about positive selection. in that article, they approximate the time of the positive selection . in their figure, something wrote like below
' Tajima's D - 250 ky |DDAF| - 80 ky Fst & XPCLR - 50~70 ky |iHS| & XPEHH - 30 ky (ky - 1000 years)'
How can approximate time of the positive selection by the result of selection tests? I can't understand...
the figure image link : https://els-jbs-prod-cdn.literatumonline.com/cms/attachment/f2edea15-7afd-458e-b2ef-2bd7e4f2c04a/gr5.jpg
this is the article, The figure (5-B) : https://www.cell.com/cell-metabolism/fulltext/S1550-4131(16)30430-2?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS1550413116304302%3Fshowall%3Dtrue