Genetic analysis of linkage disequilibrium on different populations of seven pairs alleles in sheep PRNT gene: (a) LFTS, (b) STHS, (c) TS, (d) HS, (e) SS. Loci chosen for analysis: loci1, g.17C>T; loci2, g.93G>A; loci3, g.112G>C; loci4, g.129C>T; loci5, g.144A>G; loci6, g.162G>T; loci7, g.190A>G.