Table 2.
Segregation of clubroot disease in BC1 families of a cross between ECD (1–4) and susceptible parent (YS) in Brassica rapa.
| Pedigree | Phenotype | Total | χ2 | P-value | Ratio∗ | df | ||
|---|---|---|---|---|---|---|---|---|
| Resistant | Susceptible | |||||||
| YSx(YSxECD1-4) | 24 | 22 | 46 | 0.09 | 0.77 | 1:1 | 1 | |
| YSx(YSxECD1-6) | 39 | 37 | 76 | 0.05 | 0.82 | 1:1 | 1 | |
| YSx(YSxECD1-7) | 14 | 15 | 29 | 0.03 | 0.85 | 1:1 | 1 | |
| YSx(YSxECD2-4) | 22 | 18 | 40 | 0.40 | 0.53 | 1:1 | 1 | |
| YSx(YSxECD2-5) | 15 | 21 | 36 | 1.00 | 0.32 | 1:1 | 1 | |
| YSx(YSxECD2-7) | 40 | 33 | 73 | 0.67 | 0.41 | 1:1 | 1 | |
| YSx(YSxECD3-2) | 68 | 65 | 133 | 0.07 | 0.79 | 1:1 | 1 | |
| YSx(YSxECD3-4) | 26 | 20 | 46 | 0.78 | 0.38 | 1:1 | 1 | |
| YSx(YSxECD3-5) | 28 | 22 | 50 | 0.72 | 0.40 | 1:1 | 1 | |
| Total | 3.82 | 0.93 | 9 | |||||
| Goodness of fit χ2 | 276 | 253 | 529 | 1.00 | 0.32 | 1:1 | 1 | |
| Homogeneity χ2 (Total- Pooled data) | 2.82 | 0.95 | 8 | |||||
| YSx(YSxECD1-2) | 49 | 10 | 59 | 2.04 | 0.15 | 3:1 | 1 | |
| YSx(YSxECD2-2) | 26 | 9 | 37 | 0.04 | 0.80 | 3:1 | 1 | |
| YSx(YSxECD3-1) | 89 | 30 | 119 | 0.00 | 0.96 | 3:1 | 1 | |
| YSx(YSxECD3-3) | 127 | 39 | 166 | 0.20 | 0.65 | 3:1 | 1 | |
| YSx(YSxECD3-6) | 133 | 38 | 171 | 0.70 | 0.40 | 3:1 | 1 | |
| YSx(YSxECD3-7) | 40 | 15 | 55 | 0.15 | 0.70 | 3:1 | 1 | |
| YSx(YSxECD4-l) | 30 | 6 | 36 | 1.33 | 0.25 | 3:1 | 1 | |
| YSx(YSxECD4-2) | 14 | 5 | 19 | 0.02 | 0.89 | 3:1 | 1 | |
| YSx(YSxECD4-4) | 27 | 9 | 36 | 0.00 | 1.00 | 3:1 | 1 | |
| YSx(YSxECD4-5) | 52 | 21 | 73 | 0.55 | 0.46 | 3:1 | 1 | |
| YSx(YSxECD4-8) | 57 | 16 | 73 | 0.37 | 0.54 | 3:1 | 1 | |
| Total | 5.55 | 0.94 | 12 | |||||
| Goodness of fit χ2 | 644 | 198 | 842 | 0.43 | 0.51 | 3:1 | 1 | |
| Homogeneity χ2 (Total- Pooled data) | 4.95 | 0.40 | 11 | |||||
∗Ratios represent one and two clubroot resistance genes segregating families were combined in each BC1 population derived from the same ECD accession as resistance parent.