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Table 3 ssGBLUP performance a, with different heritabilities and GPSb intensities

From: Investigating the impact of preselection on subsequent single-step genomic BLUP evaluation of preselected animals

Measure/intensity of GPS Noc Highd Very highe
Heritability of 0.5
 Preselection accuracyf Not applicable 0.81 (0.81–0.81) 0.81 (0.81–0.81)
 Subsequent selection accuracyg 0.88 (0.88–0.88) 0.66 (0.64–0.68) 0.65 (0.63–0.67)
 Absolute biash 0.01 (0.01–0.01) 0.03 (0.01–0.05) 0.04 (0.02–0.06)
 Dispersion biasi 1.02 (1.02–1.02) 1.06 (1.04–1.08) 1.05 (1.03–1.07)
 True realized genetic gainj 1.53 (1.49–1.57) 1.48 (1.44–1.52) 1.45 (1.41–1.49)
 Estimated realized genetic gaink 1.50 (1.48–1.52) 1.45 (1.43–1.47) 1.43 (1.41–1.45)
Heritability of 0.3
 Preselection accuracyf Not applicable 0.78 (0.78–0.78) 0.78 (0.78–0.78)
 Subsequent selection accuracyg 0.86 (0.86–0.86) 0.59 (0.57–0.61) 0.58 (0.56–0.60)
 Absolute biash 0.01 (0.01–0.01) 0.02 (0.00–0.04) 0.02 (0.00–0.04)
 Dispersion biasi 1.01 (1.01–1.01) 1.01 (0.97–1.05) 0.98 (0.94–1.02)
 True realized genetic gainj 1.46 (1.42–1.50) 1.39 (1.35–1.43) 1.37 (1.33–1.41)
 Estimated realized genetic gaink 1.45 (1.41–1.49) 1.41 (1.37–1.45) 1.39 (1.35–1.43)
Heritability of 0.1
 Preselection accuracyf Not applicable 0.71 (0.69–0.73) 0.71 (0.69–0.73)
 Subsequent selection accuracyg 0.80 (0.78–0.82) 0.48 (0.44–0.52) 0.48 (0.44–0.52)
 Absolute biash 0.01 (0.01–0.01) 0.03 (0.01–0.05) 0.03 (0.01–0.05)
 Dispersion biasi 1.02 (1.00–1.04) 1.01 (0.95–1.07) 1.00 (0.94–1.06)
 True realized genetic gainj 1.38 (1.32–1.44) 1.26 (1.18–1.34) 1.24 (1.16–1.32)
 Estimated realized genetic gaink 1.36 (1.30–1.42) 1.28 (1.22–1.34) 1.26 (1.20–1.32)
  1. aResults shown only for selection candidates in the most recent generation (i.e. generation 15), and the results are means of 10 replicates (and 95% confidence intervals)
  2. bGenomic preselection
  3. cNo preselection
  4. d10% of the male and 15% of the female selection candidates were preselected
  5. e5% of the males and 12.5% of the female selection candidates were preselected
  6. fCorrelation between true and genomic estimated breeding values of all selection candidates
  7. gCorrelation between true and genomic estimated breeding values of all preselected animals
  8. hDifference between average true breeding value and average genomic estimated breeding value of preselected animals, expressed in additive genetic standard deviation
  9. iCoefficient of the regression of true on genomic estimated breeding values of the preselected animals
  10. jDifference between average true breeding value of the subsequently selected animals and average true breeding value of their parents, expressed in additive genetic standard deviation
  11. kDifference between average genomic estimated breeding value of the subsequently selected animals and average genomic estimated breeding value of their parents, expressed in additive genetic standard deviation
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Genetics Selection Evolution

ISSN: 1297-9686

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