Ternary plot (de Finetti diagram) of different marker genotypes. Squares = linkage group 6; Diamonds = linkage group 5; Triangles tip up = linkage group 1; Triangles tip down = linkage group 13; Solid dots = all other genotypes. Large circles show the significant limits for χ2-test p-value. Symbols outside these circles show a significant deviation from the expected 1:2:1 ratio: from inside to outside P < 0.05, P < 0.01 and P < 0.001. The curved line indicates the expected Hardy-Weinberg equilibriums for all possible allele frequencies; below this line there are fewer heterozygotes than expected, and above it there are more than expected.