Table 1.
The number of vineyard environments, greenhouse (GH) timepoints, and laboratory (Lab) experiments with significant quantitative trait locus (QTL) for powdery mildew severity by tissue in B37-28 × C56-11.
| Environments significant | |||||||
|---|---|---|---|---|---|---|---|
| Chra | Minimum Interval (Mbp)a | Leafb | Rachisb | Berryb | Stemb | Maximum variancec | Resistance source |
| Validatedd | |||||||
| 6 | 17.68–21.33 | 2 | 1 | – | 1 | 5.2% | Eithere |
| 8 | 0.47–11.99 | – | – | – | 3 | 29.8% | B37-28 |
| 9 | 14.19–16.09 | – | – | – | 6 | 25.4% | B37-28 |
| 15 | 13.06–15.16 | 11 | 11 | 11 | 7 | 96.2% | B37-28 |
| Not Validated | |||||||
| 1 | 6.87–10.67 | 1 | – | – | – | 38.0% | Either |
| 1 | 6.87–9.70 | Lab | – | – | – | 27.9% | Either |
| 2 | 0.39–4.60 | GH | – | – | – | 37.7% | C56-11 |
| 5 | 9.10–18.63 | – | 1 | 1 | – | 21.1% | Either |
| 6 | 0.50–2.03 | 1 | – | – | – | 31.5% | Either |
| 7 | 7.44–24.51 | – | – | 1 | – | 19.2% | Either |
| 10 | 0.42–2.60 | – | – | – | 1 | 13.4% | Either |
| 17 | 6.20–12.16 | GH | – | – | – | 39.1% | Either |
The bottom eight QTL were observed in only one environment and are considered not validated.
Physical position in the PN40024 12X.v2 reference genome for the narrowest QTL identified for any significant environment; all significant QTL that overlaps this region are reported in this line. Chr, chromosome.
Number of vineyard environments for which the QTL was significant for each tissue, with a maximum of 12 possible. Lab, controlled laboratory inoculation experiment; GH, natural inoculum greenhouse experiment with the early and late ratings.
The maximum phenotypic variance explained by a QTL at this locus for a single environment.
The top four QTL are considered validated because they were statistically significant in multiple independent environments.
Either = Significantly increased susceptibility at this locus required a specific haplotype contributed from each parent. While Chr 1 QTL overlap, these susceptibility effects were in repulsion, meaning the opposite haplotype combination was required for increased susceptibility in the vineyard vs. the lab.