Accuracy of genetic prediction obtained using genetic relationships based on pedigree or marker information
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TSAP and ILRI
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The accuracy of genetic prediction when pedigree ( P A ) or pedigree and marker-based ( PM A )
relationships were used in mixed model equations was assessed. Daughter yield deviations (DYD)
records for milk, fat and protein yields on Holstein sires (n = 1,811) with DNA marker information
were analysed. Three sets of estimated breeding values (EBV) were obtained: (1) EBV-ALL
(considered all sources of information and the inverse of), (2) EBV-PED (similar to EBV-ALL
but the sire’s own DYD was excluded), and (3) EBV-MRK (similar to EBV-PED except that the
inverse of was used). Linear and rank correlations were computed between EBV-ALL and EBVPED or EBV-MRK. The accuracy increased by 4.3% for milk yield but did not change for fat and
protein yields when was replaced by for sires without sons. These results suggest that genetic
markers may be used to enhance accuracy in genetic evaluation particularly for young animals.
Palabras clave
breeds, livestock