Table 4.
Summary of recently identified QTL for LR and SR resistances and their validation in SRWW in the southeast US.
| Mapping population | Population sizea | Number of experiments | Traits studiedb | Gene/QTL identified/validated | Linked markers | R2c | References |
|---|---|---|---|---|---|---|---|
| QTL Identification | |||||||
| Pioneer ‘25R47’/Jamestown | 186 RILs | Field (6) | IT (0-9 scale), DS |
QLr.vt-5B1 QLr.vt-5B2 |
IWB7835/IWB24418 IWB32871/IWB26068 |
22.1 8.1 |
Carpenter et al., 2017 |
| AGS 2038/UGA 111729 | 225 RILs | Field (3); greenhouse (1) | IT (0-4 scale), DS | Lr2K38 | IWB20487 | 34.4 | Sapkota, 2019 |
| Pioneer® variety 26R61/AGS 2000 | 175 RILs | Growth chamber (3) | IT (0-4 scale) | LrA2K | Xwmc770 | 75.3 | Sapkota et al., 2019b |
| Pioneer variety® 26R61/AGS 2000 | 178 RILs | Field (3) | IT (0-9 scale) | YrR61 | Xbarc124/Xgwm359 | 56.0 | Hao et al., 2011 |
| VA00W-38/Pioneer Brand 26R46 | 182 RILS | Field (4) | IT (0-9 scale), DS |
QYrva.vt-2AS QYrva.vt-4BL QYrpi.vt-6BL |
Xgwm296b Xbarc163 Xwmc756 |
58.9 19.3 11.7 |
Christopher et al., 2013 |
| VA96W-270/Coker 9835 | 146 RILs | Field (4) | DS and AUDPC |
QYr.ar-3BS QYr.ar-4BL |
IWA6471 IWA3551 |
28.3 26.3 |
Subramanian et al., 2016 |
| Pioneer ‘25R47’/Jamestown | 186 RILs | Field (6) | IT (0-9 scale), DS |
QYr.vt-3B QYr.vt-6A |
IWB60574/IWB23272 IWB5971/IWB63000 |
11.1 14.3 |
Carpenter et al., 2017 |
| QTL Validation | |||||||
| Pioneer ‘25R47’/Jamestown | 186 RILs; 1600 individuals (200 from each fight F2 population) | Growth chamber (1) | IT (0-4 scale) | Lr18 | IWB41960 | – | Carpenter et al., 2018 |
aRILs, recombinant inbred lines.
bIT, infection type; DS, disease severity; AUDPC, area under disease progress curve.
cThe highest amount of phenotypic variation (%) explained by the QTL.