Table 1 Frequency of F2 population phenotypes distributed across six different disease indices
From: Mapping of a novel clubroot resistance QTL using ddRAD-seq in Chinese cabbage (Brassica rapa L.)
Parents and crosses | Type | Disease indices (0–4) | Phenotypes and expected ratio (3:1) |  | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 1 | 2 | 3 | 4 | Total | R | S | χ2 | p | ||
CC-F8920 | S parent | 0 | 0 | 0 | 4 | 20 | 24 | 0 | 24 | Â | Â |
SCNU-T2016 | R parent | 24 | 0 | 0 | 0 | 0 | 24 | 24 | 0 | Â | Â |
CC-F8920 × SCNU-T2016 | F1 | 24 | 0 | 0 | 0 | 0 | 24 | 24 | 0 |  |  |
CC-F8920 × SCNU-T2016 | F2 | 262 | 12 | 8 | 8 | 58 | 348 | 261 | 87 | 0.015 | 0.91 |