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Domestic estimated breeding values and genomic enhanced breeding values of bulls in comparison with their foreign genomic enhanced breeding values

Published online by Cambridge University Press:  02 July 2015

J. Přibyl ,
J. Bauer ,
V. Čermák ,
P. Pešek ,
J. Přibylová ,
J. Šplíchal ,
H. Vostrá-Vydrová ,
L. Vostrý  and
L. Zavadilová
J. Přibyl
Affiliation:
Institute of Animal Science, Přátelství 815, Prague-Uhříněves 104 00, Czech Republic
J. Bauer
Affiliation:
Institute of Animal Science, Přátelství 815, Prague-Uhříněves 104 00, Czech Republic
V. Čermák
Affiliation:
Czech Moravian Breeding Corporation, Hradištko 123, 252 09, Czech Republic
P. Pešek
Affiliation:
Institute of Animal Science, Přátelství 815, Prague-Uhříněves 104 00, Czech Republic
J. Přibylová
Affiliation:
Institute of Animal Science, Přátelství 815, Prague-Uhříněves 104 00, Czech Republic
J. Šplíchal
Affiliation:
Czech Moravian Breeding Corporation, Hradištko 123, 252 09, Czech Republic
H. Vostrá-Vydrová
Affiliation:
Institute of Animal Science, Přátelství 815, Prague-Uhříněves 104 00, Czech Republic
L. Vostrý
Affiliation:
Institute of Animal Science, Přátelství 815, Prague-Uhříněves 104 00, Czech Republic
L. Zavadilová*
Affiliation:
Institute of Animal Science, Přátelství 815, Prague-Uhříněves 104 00, Czech Republic
*
†E-mail: zavadilova.ludmila@vuzv.cz
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Abstract

Estimated breeding values (EBVs) and genomic enhanced breeding values (GEBVs) for milk production of young genotyped Holstein bulls were predicted using a conventional BLUP – Animal Model, a method fitting regression coefficients for loci (RRBLUP), a method utilizing the realized genomic relationship matrix (GBLUP), by a single-step procedure (ssGBLUP) and by a one-step blending procedure. Information sources for prediction were the nation-wide database of domestic Czech production records in the first lactation combined with deregressed proofs (DRP) from Interbull files (August 2013) and domestic test-day (TD) records for the first three lactations. Data from 2627 genotyped bulls were used, of which 2189 were already proven under domestic conditions. Analyses were run that used Interbull values for genotyped bulls only or that used Interbull values for all available sires. Resultant predictions were compared with GEBV of 96 young foreign bulls evaluated abroad and whose proofs were from Interbull method GMACE (August 2013) on the Czech scale. Correlations of predictions with GMACE values of foreign bulls ranged from 0.33 to 0.75. Combining domestic data with Interbull EBVs improved prediction of both EBV and GEBV. Predictions by Animal Model (traditional EBV) using only domestic first lactation records and GMACE values were correlated by only 0.33. Combining the nation-wide domestic database with all available DRP for genotyped and un-genotyped sires from Interbull resulted in an EBV correlation of 0.60, compared with 0.47 when only Interbull data were used. In all cases, GEBVs had higher correlations than traditional EBVs, and the highest correlations were for predictions from the ssGBLUP procedure using combined data (0.75), or with all available DRP from Interbull records only (one-step blending approach, 0.69). The ssGBLUP predictions using the first three domestic lactation records in the TD model were correlated with GMACE predictions by 0.69, 0.64 and 0.61 for milk yield, protein yield and fat yield, respectively.

Keywords

genomic breeding valuesingle-step predictiontest-day modelanimal modeldairy cattle
Type
Research Article
Information
animal , Volume 9 , Issue 10 , October 2015 , pp. 1635 - 1642
Copyright
© The Animal Consortium 2015 

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