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[PMID]: | 27179857 |
[Au] Autor: | Cooper TA; Eaglen SAE; Wiggans GR; Jenko J; Huson HJ; Morrice DR; Bichard M; Luff WGL; Woolliams JA |
[Ad] Endereço: | Animal Genomics and Improvement Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705-2350. |
[Ti] Título: | Genomic evaluation, breed identification, and population structure of Guernsey cattle in North America, Great Britain, and the Isle of Guernsey. |
[So] Source: | J Dairy Sci;99(7):5508-5515, 2016 Jul. | [Is] ISSN: | 1525-3198 |
[Cp] País de publicação: | United States |
[La] Idioma: | eng |
[Ab] Resumo: | As of December 2015, 2,376 Guernsey bulls and cows had genotypes from collaboration between the United States, Canada, the United Kingdom, and the Isle of Guernsey. Of those, 439 bulls and 504 cows had traditional US evaluations, which provided sufficient data to justify investigation of the possible benefits of genomic evaluation for the Guernsey breed. Evaluation accuracy was assessed using a traditional 4-yr cutoff study. Twenty-two traits were analyzed (5 yield traits, 3 functional traits, and 14 conformation traits). Mean reliability gain over that for parent average was 16.8 percentage points across traits, which compares with 8.2, 18.5, 20.0, and 32.6 percentage points reported for Ayrshires, Brown Swiss, Jerseys, and Holsteins, respectively. Highest Guernsey reliability gains were for rump width (44.5 percentage points) and dairy form (40.5 percentage points); lowest gains were for teat length (1.9 percentage points) and rear legs (side view) (2.3 percentage points). Slight reliability losses (1.5 to 4.5 percentage points) were found for udder cleft, final score, and udder depth as well as a larger loss (13.6 percentage points) for fore udder attachment. Twenty-one single nucleotide polymorphisms were identified for Guernsey breed determination and can be used in routine genotype quality control to confirm breed and identify crossbreds. No haplotypes that affect fertility were identified from the current data set. Principal component analysis showed some divergence of US and Isle of Guernsey subpopulations. However, the overlap of US, Canadian, UK, and Isle of Guernsey subpopulations indicated the presence of gene flow, and the similarities in the subpopulations supports a common genomic evaluation system across the regions. |
[Mh] Termos MeSH primário: |
Bovinos/classificação Bovinos/genética
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[Mh] Termos MeSH secundário: |
Animais Cruzamento Canadá Bovinos/anatomia & histologia Feminino Fertilidade/genética Genômica Genótipo Guernsey Haplótipos Lactação/genética Masculino América do Norte Fenótipo Polimorfismo de Nucleotídeo Único Característica Quantitativa Herdável Reprodutibilidade dos Testes Reprodução/genética Especificidade da Espécie Reino Unido Estados Unidos
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[Pt] Tipo de publicação: | JOURNAL ARTICLE |
[Em] Mês de entrada: | 1705 |
[Cu] Atualização por classe: | 170817 |
[Lr] Data última revisão:
| 170817 |
[Sb] Subgrupo de revista: | IM |
[Da] Data de entrada para processamento: | 160516 |
[St] Status: | MEDLINE |
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