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Table 4 Accuracy and unbiasedness of genomic prediction of growth and reproductive traits performed with the BayesC π method as assessed with 20 replicates of five-fold CV

From: The superiority of multi-trait models with genotype-by-environment interactions in a limited number of environments for genomic prediction in pigs

Population1

Method2

Measurement3

AGE4

BFT4

NBA4

TNB4

Beijing

ST-BayesC π _single

Accuracy

0.306 ± 0.028a

0.328 ± 0.023a

0.156 ± 0.032a

0.179 ± 0.035a

Unbiasedness

1.218 ± 0.278

1.013 ± 0.212

1.182 ± 0.343

1.112 ± 0.302

ST-BayesC π _combined

Accuracy

0.304 ± 0.032a

0.328 ± 0.038a

0.154 ± 0.035a

0.180 ± 0.034a

Unbiasedness

1.287 ± 0.265

0.853 ± 0.274

1.152 ± 0.362

1.124 ± 0.293

MT-BayesC π

Accuracy

0.312 ± 0.035b

0.347 ± 0.026b

0.183 ± 0.029b

0.201 ± 0.031b

Unbiasedness

1.160 ± 0.217

1.056 ± 0.224

1.065 ± 0.236

0.992 ± 0.272

Fujian

ST-BayesC π _single

Accuracy

0.243 ± 0.023a

0.262 ± 0.024a

0.164 ± 0.043a

0.152 ± 0.044a

Unbiasedness

1.052 ± 0.263

1.032 ± 0.232

1.115 ± 0.321

1.076 ± 0.362

ST-BayesC π _combined

Accuracy

0.244 ± 0.025a

0.264 ± 0.028a

0.165 ± 0.047a

0.154 ± 0.047a

Unbiasedness

0.874 ± 0.134

1.330 ± 0.254

1.245 ± 0.308

1.222 ± 0.353

MT-BayesC π

Accuracy

0.275 ± 0.024b

0.284 ± 0.021b

0.181 ± 0.051b

0.183 ± 0.049b

Unbiasedness

1.034 ± 0.197

1.088 ± 0.256

1.143 ± 0.363

1.059 ± 0.345

  1. 1 Yorkshire pig populations from Beijing and Fujian with similar genetic backgrounds
  2. 2 ST-GBLUP_single: single-trait GBLUP model with a single population as the reference population; ST-GBLUP_combined: single-trait GBLUP model two populations combined as the reference population; MT-GBLUP: multi-trait GBLUP model in which values of the same trait in different populations were considered different traits
  3. 3 Accuracy: the correlation between GEBVs and corrected phenotypic values in the validation population; Unbiasedness: the regression of corrected phenotypic values on GEBVs
  4. 4 AGE: days to 100 kg; BFT: backfat thickness at 100 kg; NBA: number of piglets born alive; TNB: total number of piglets born
  5. a, b Values with different superscript letters significantly differ (P < 0.05)