Figure 1:
Population relationship and structure. (a) Principal component analysis of Chinese and European pigs. ECN, East Chinese pig; EUD, European domestic pig; NCN, North Chinese pig; SCN, South Chinese pig; SWCN, Southwest Chinese pig. (b) Neighbor-joining (NJ) tree based on an identity-by-state matrix among individuals. (c) NJ tree based on an FST matrix between populations. (d) Population structure of Chinese and European pigs revealed by ADMIXTURE analysis. AWB: Asian wild boar; BMX: Bamaxiang pig; DU: Duroc; EHL: Erhualian pig; EWB: European wild boar; FLW: French Large White pig; GST: Tibetan pig (gansu); HMP: Hampshire; HT: Hetao pig; JH: Jinhua pig; KLW: Korea Large White pig; LR: Landrace; LUC: Luchuan pig; LWH: Laiwu pig; MIN: Min pig; MS: Meishan pig; OUT: outgroup; PI: Pietrain; SCT: Tibetan pig (Sichuan); TT: Tibetan pig (Tibet); WDU: White Duroc; WLW: Dutch Large White pig; WZS: Wuzhishan pig; XIANG: Xiang pig; YNT: Tibetan pig (Yunnan).