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. 2020 Mar 17;13(1):e20004. doi: 10.1002/tpg2.20004

TABLE 2.

Comparing within and between generation predictions in the ‘Buffalo’ × ‘Tardis’ population using training populations of early generation phenotyped (GenP) individuals (Phenn) for common traits assessed in a test set composed of F7 recombinant inbred lines (RILs) in either the field (F) or polytunnel (PT). The true correlation between phenotypes (CorrP) is used as a proxy for early phenotypic selection. A comparison is made on the change in accuracy of prediction within and between generation when variable numbers of F2 individuals are genotyped (all including Dw6 Tall and Dwarf class, 50, 33, 25, and 20%)

Accuracy of prediction based on proportion of F2 individuals genotyped
Training set Test set (F7)   Genotype all (F2) Genotype 0.50 Genotype 0.33 Genotype 0.25 Genotype 0.20
Trait GenP Phenn Trial Phenn CorrP All Tall Dwarf Within Between Within Between Within Between Within Between
Internode 1 length F2 161 PT 213 0.38 0.76 0.00 0.22 0.73 0.71 0.70 0.67 0.67 0.62 0.64 0.58
F4 81 PT 213 0.77 0.77 0.30 0.21 0.75 0.69 0.74 0.65 0.72 0.59 0.72 0.54
Kernel content F4 161 F 152 0.10 0.66 0.49 0.26 0.39 0.39 0.39 0.39 0.39 0.39 0.39 0.39
Maturity F4 161 F 152 0.22 0.36 0.23 0.16 0.33 0.31 0.31 0.28 0.30 0.25 0.29 0.23
Mildew F3 161 F 137 0.21 0.49 0.34 0.55 0.49 0.47 0.47 0.46 0.46 0.43 0.44 0.41
Panicle extrusion F4 81 PT 213 0.86 0.82 0.21 0.00 0.81 0.73 0.81 0.69 0.80 0.64 0.80 0.60
Winter hardiness F3 136 F 213 0.22 0.43 0.36 0.18 0.34 0.30 0.29 0.25 0.27 0.21 0.25 0.19
F4 159 F 213 0.40 0.61 0.63 0.64 0.56 0.55 0.53 0.50 0.50 0.45 0.49 0.42
Grain yield F4 161 F 213 0.38 0.63 0.03 0.25 0.57 0.53 0.52 0.46 0.48 0.40 0.46 0.36
Ear emergence F2 161 PT 213 0.05 0.29 0.11 0.13 0.24 0.25 0.20 0.21 0.17 0.19 0.15 0.17
F3 91 PT 213 0.04 0.12 0.00 0.00 0.00 0.12 0.00 0.08 0.00 0.06 0.00 0.05
F2 161 F 213 0.19 0.62 0.15 0.00 0.56 0.57 0.51 0.51 0.47 0.47 0.44 0.42
F3 91 F 213 0.54 0.62 0.03 0.00 0.53 0.57 0.52 0.51 0.51 0.47 0.50 0.44
Height F2 161 PT 208 0.37 0.81 0.18 0.19 0.78 0.76 0.75 0.72 0.71 0.66 0.68 0.61
F3 161 PT 208 0.50 0.86 0.11 0.05 0.84 0.82 0.81 0.78 0.78 0.73 0.75 0.68
F2 161 F 208 0.37 0.82 0.04 0.46 0.79 0.77 0.75 0.73 0.73 0.68 0.68 0.63
  F3 161 F 208 0.50 0.87 0.20 0.05 0.84 0.83 0.81 0.78 0.78 0.74 0.76 0.69