Figure 1

The distribution, the distortion direction, and the distortion intensity of SSD markers on the established linkage groups. The vertical rulers at the left indicate the genetic lengths of the linkage groups in cM. The horizontal rulers at the bottom of each linkage group are the chi-square rulers indicating the distortion intensity. In the chart of each linkage group, the left and the right vertical bars corresponding to the Chi-square value of 3.84, which is the statistical criterion to indicate that the segregation distortion does not occur by chance alone; the middle vertical bar corresponding to Chi-square value of 0.00; horizontal bars on each linkage group are used to indicate the position, the distortion direction, and the distortion intensity of the mapped markers; horizontal bars at the left of each middle vertical bar indicate more absence of the visible alleles; horizontal bars at the right of each middle vertical bar indicate more presence of the visible alleles.