Table 3.
Summary of mean genomic best linear unbiased prediction (GBLUP) cross-validated predictive accuracies across populations. Four subset selection methods (random vs. STPGA) and the full set were considered. The highest predictive accuracy across subsets and the full set is indicated in bold.
| Train | Test | Trait | 300 |
600 |
900 |
1200 |
Full | CVGBLUP† | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STPGA | Random | STPGA | Random | STPGA | Random | STPGA | Random | |||||
| NR + GG | UG | VIGOR | 0.199 | 0.083 | 0.182 | 0.102 | 0.221 | 0.152 | 0.200 | 0.174 | 0.193 | 0.353 |
| NR + GG | UG | MCMDS | 0.293 | 0.224 | 0.284 | 0.264 | 0.262 | 0.279 | 0.284 | 0.291 | 0.285 | 0.404 |
| NR + GG | UG | DM | 0.272 | 0.209 | 0.282 | 0.227 | 0.258 | 0.254 | 0.252 | 0.272 | 0.284 | 0.296 |
| NR + GG | UG | HI | 0.294 | 0.176 | 0.278 | 0.230 | 0.266 | 0.215 | 0.228 | 0.214 | 0.206 | 0.454 |
| NR + GG | UG | RTWT | 0.155 | 0.072 | 0.165 | 0.124 | 0.181 | 0.156 | 0.179 | 0.174 | 0.193 | 0.314 |
| NR + GG | UG | RTNO | 0.149 | 0.068 | 0.171 | 0.151 | 0.175 | 0.167 | 0.195 | 0.190 | 0.206 | 0.348 |
| NR + GG | UG | SHTWT | 0.014 | 0.059 | 0.042 | 0.075 | 0.027 | 0.066 | 0.037 | 0.071 | 0.075 | 0.244 |
| UG + NR | GG | VIGOR | 0.011 | 0.054 | 0.032 | 0.049 | 0.050 | 0.061 | – | – | 0.060 | 0.231 |
| UG + NR | GG | MCMDS | 0.374 | 0.325 | 0.377 | 0.341 | 0.372 | 0.374 | – | – | 0.382 | 0.558 |
| UG + NR | GG | DM | 0.216 | 0.173 | 0.221 | 0.212 | 0.235 | 0.238 | – | – | 0.244 | 0.666 |
| UG + NR | GG | HI | 0.261 | 0.210 | 0.252 | 0.204 | 0.222 | 0.213 | – | – | 0.215 | 0.386 |
| UG + NR | GG | RTWT | 0.079 | 0.077 | 0.095 | 0.073 | 0.084 | 0.061 | – | – | 0.063 | 0.320 |
| UG + NR | GG | RTNO | 0.132 | 0.096 | 0.130 | 0.110 | 0.113 | 0.097 | – | – | 0.099 | 0.345 |
| UG + NR | GG | SHTWT | 0.154 | 0.110 | 0.163 | 0.160 | 0.145 | 0.156 | – | – | 0.162 | 0.321 |
| GG + UG | NR | VIGOR | 0.054 | -0.003 | 0.029 | 0.003 | 0.039 | 0.014 | 0.017 | 0.011 | 0.016 | -0.024 |
| GG + UG | NR | MCMDS | 0.193 | 0.138 | 0.186 | 0.154 | 0.189 | 0.190 | 0.193 | 0.188 | 0.213 | 0.188 |
| GG + UG | NR | DM | 0.116 | 0.110 | 0.151 | 0.142 | 0.166 | 0.155 | 0.168 | 0.167 | 0.184 | 0.104 |
| GG + UG | NR | HI | 0.149 | 0.122 | 0.157 | 0.145 | 0.151 | 0.151 | 0.164 | 0.155 | 0.181 | 0.271 |
| GG + UG | NR | RTWT | 0.080 | 0.070 | 0.120 | 0.048 | 0.099 | 0.058 | 0.096 | 0.071 | 0.082 | 0.220 |
| GG + UG | NR | RTNO | 0.074 | 0.064 | 0.066 | 0.051 | 0.041 | 0.054 | 0.040 | 0.053 | 0.053 | 0.180 |
| GG + UG | NR | SHTWT | 0.094 | 0.089 | 0.107 | 0.088 | 0.107 | 0.099 | 0.112 | 0.106 | 0.119 | 0.169 |
CVGBLUP = cross-validation GBLUP within the test population; GG, International Institute of Tropical Agriculture Genetic Gain germplasm collection; NR, National Root Crops Research Institute; UG, National Crops Resources Research Institute; DM, dry matter content; HI, harvest index; RTWT, root weight; RTNO, root number; SHTWT, shoot weight; MCMDS, mean cassava mosaic disease severity; VIGOR, early plant vigor.