Table 1. Accuracy of phenotypic selection and predictive abilities (PAs) of genomic selection for different cross-validation (CV) schemes and selection targets for MAI, BWD and SPY in the Eucalyptus breeding population.
Attribute | MAI | BWD | SPY | |
---|---|---|---|---|
Phenotypic | ||||
35.28±16.87 | 471.64±33.38 | 50.76±2.33 | ||
h2A | 0.33 | 0.69 | 0.46 | |
h2T | 0.51 | 0.70 | 0.48 | |
Accuracy of individual selection | 0.70 | 0.80 | 0.74 | |
Accuracy of family selection | 0.78 | 0.85 | 0.83 | |
Genomic | ||||
h2G | 0.26 | 0.67 | 0.37 | |
h2G+D | 0.48 | 0.67 | 0.42 | |
Explained h2T | 94.1% | 95.7% | 87.5% | |
CV_Random: cross-validation including full- and half-sib individuals | ||||
PA individual selection | 0.49/0.52 | 0.65/0.64 | 0.53/0.51 | |
PA between-family selection | 0.78/0.80 | 0.84/0.83 | 0.79/0.79 | |
PA within-family individual selection | Min | 0.16/0.35 | 0.36/0.36 | 0.23/0.20 |
Mean | 0.48/0.52 | 0.64/0.63 | 0.53/0.53 | |
Median | 0.52/0.55 | 0.63/0.63 | 0.54/0.53 | |
Max | 0.72/0.79 | 0.84/0.84 | 0.88/0.88 | |
CV+Relatedness: cross-validation including only half-sib individuals | ||||
PA individual selection | 0.40/0.50 | 0.64/0.64 | 0.50/0.51 | |
PA between-family selection | 0.76/0.79 | 0.74/0.75 | 0.68/0.66 | |
PA within-family individual selection | Min | 0.04/−0.03 | 0.31/0.31 | 0.14/0.00 |
Mean | 0.41/0.47 | 0.60/0.61 | 0.47/0.46 | |
Median | 0.41/0.48 | 0.63/0.64 | 0.51/0.48 | |
Max | 0.80/0.78 | 0.84/0.85 | 0.84/0.84 | |
CV−Relatedness: cross-validation with no relatedness | ||||
PA individual selection | 0.37/0.40 | 0.56/0.57 | 0.48/0.48 | |
PA between-family selection | 0.52/0.56 | 0.63/0.75 | 0.65/0.65 | |
PA within-family individual selection | Min | −0.21/−0.15 | 0.20/0.20 | 0.09/0.11 |
Mean | 0.34/0.39 | 0.54/0.52 | 0.46/0.46 | |
Median | 0.34/0.41 | 0.57/0.56 | 0.45/0.45 | |
Max | 0.73/0.74 | 0.82/0.82 | 0.87/0.85 |
Abbreviations: BWD, basic wood density (kg m−3); h2, trait heritability; h2G, genomic heritability; MAI, mean annual increment (m3 ha−1 per year); Max, maximum; Min, minimum; SPY, screened pulp yield (%); , phenotypic mean and their s.d.
PAs are reported for the additive-only model (G)/additive+dominance model (G+D).