期刊
JOURNAL OF DAIRY SCIENCE
卷 99, 期 6, 页码 4574-4579出版社
ELSEVIER SCIENCE INC
DOI: 10.3168/jds.2015-10609
关键词
BLUP; genotype by environment interaction; Holstein population; single-step genomic BLUP
资金
- Genomic Selection in Plants and Animals (GenSAP) research project - Danish Council of Strategic Research (Aarhus, Denmark)
The present study investigated the improvement of prediction reliabilities for 3 production traits in Brazilian Holsteins that had no genotype information by adding information from Nordic and French Holstein bulls that had genotypes. The estimated across-country genetic correlations (ranging from 0.604 to 0.726) indicated that an important genotype by environment interaction exists between Brazilian and Nordic (or Nordic and French) populations. Prediction reliabilities for Brazilian genotyped bulls were greatly increased by including data of Nordic and French bulls, and a 2-trait single-step genomic BLUP performed much better than the corresponding pedigree-based BLUP. However, only a minor improvement in prediction reliabilities was observed in nongenotyped Brazilian cows. The results indicate that although there is a large genotype by environment interaction, inclusion of a foreign reference population can improve accuracy of genetic evaluation for the Brazilian Holstein population. However, a Brazilian reference population is necessary to obtain a more accurate genomic evaluation.
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