|
|
Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
29/12/2019 |
Data da última atualização: |
06/02/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SILVA, A. A.; SILVA, F. F.; SILVA, D. A.; SILVA, H. T.; COSTA, C. N.; LOPES, P. S.; VERONEZE, R.; THOMPSON, G.; CARVALHEIRA, J. |
Afiliação: |
ALESSANDRA ALVES SILVA; FABYANO FONSECA SILVA; DELVAN ALVES SILVA; HUGO TEIXEIRA SILVA; CLAUDIO NAPOLIS COSTA, CNPGL; PAULO SÁVIO LOPES; RENATA VERONEZE; GERTRUDE THOMPSON; JULIO CARVALHEIRA. |
Título: |
Genotype imputation strategies for Portuguese Holstein cattle using different SNP panels. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Czech Journal of Animal Science, v. 64, n. 9, p. 377-386, 2019. |
DOI: |
https://doi.org/10.17221/120/2019-CJAS |
Idioma: |
Inglês |
Conteúdo: |
Although several studies have investigated the factors affecting imputation accuracy, most of these studies involved a large number of genotyped animals. Thus, results from these studies cannot be directly applied to small populations, since the population structure affects imputation accuracy. In addition, factors affecting imputation accuracy may also be intensified in small populations. Therefore, we aimed to compare different imputation strate-gies for the Portuguese Holstein cattle population considering several commercially available single nucleotide poly-morphism (SNP) panels in a relatively small number of genotyped animals. Data from 1359 genotyped animals were used to evaluate imputation in 7 different scenarios. In the S1 to S6 scenarios, imputations were performed from LDv1, 50Kv1, 57K, 77K, HDv3 and Ax58K panels to 50Kv2 panel. In these scenarios, the bulls in 50Kv2 were divided into reference (352) and validation (101) populations based on the year of birth. In the S7 scenario, the validation population consisted of 566 cows genotyped with the Ax58K panel with theirgenotypes masked to LDv1. In general, all sample imputation accuracies were high with correlations ranging from 0.94 to 0.99 and concordance rate rang-ing from 92.59 to 98.18%. SNP-specific accuracy was consistent with that of sample imputation. S4 (40.32% of SNPs imputed) had higher accuracy than S2 and S3, both with less than 7.59% of SNPs imputed. Most probably, this was due to the high number of imputed SNPs with minor allele frequency (MAF) < 0.05 in S2 and S3 (by 18.43% and 16.06% higher than in S4, respectively). Therefore, for these two scenarios, MAF was more relevant than the panel density. These results suggest that genotype imputation using several commercially available SNP panels is feasible for the Portuguese national genomic evaluation. MenosAlthough several studies have investigated the factors affecting imputation accuracy, most of these studies involved a large number of genotyped animals. Thus, results from these studies cannot be directly applied to small populations, since the population structure affects imputation accuracy. In addition, factors affecting imputation accuracy may also be intensified in small populations. Therefore, we aimed to compare different imputation strate-gies for the Portuguese Holstein cattle population considering several commercially available single nucleotide poly-morphism (SNP) panels in a relatively small number of genotyped animals. Data from 1359 genotyped animals were used to evaluate imputation in 7 different scenarios. In the S1 to S6 scenarios, imputations were performed from LDv1, 50Kv1, 57K, 77K, HDv3 and Ax58K panels to 50Kv2 panel. In these scenarios, the bulls in 50Kv2 were divided into reference (352) and validation (101) populations based on the year of birth. In the S7 scenario, the validation population consisted of 566 cows genotyped with the Ax58K panel with theirgenotypes masked to LDv1. In general, all sample imputation accuracies were high with correlations ranging from 0.94 to 0.99 and concordance rate rang-ing from 92.59 to 98.18%. SNP-specific accuracy was consistent with that of sample imputation. S4 (40.32% of SNPs imputed) had higher accuracy than S2 and S3, both with less than 7.59% of SNPs imputed. Most probably, this was due to the high number of... Mostrar Tudo |
Palavras-Chave: |
Genomic evaluation; Imputation accuracy. |
Thesaurus Nal: |
Dairy cattle. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/207907/1/120-2019-CJAS.pdf
|
Marc: |
LEADER 02654naa a2200265 a 4500 001 2117818 005 2024-02-06 008 2019 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.17221/120/2019-CJAS$2DOI 100 1 $aSILVA, A. A. 245 $aGenotype imputation strategies for Portuguese Holstein cattle using different SNP panels.$h[electronic resource] 260 $c2019 520 $aAlthough several studies have investigated the factors affecting imputation accuracy, most of these studies involved a large number of genotyped animals. Thus, results from these studies cannot be directly applied to small populations, since the population structure affects imputation accuracy. In addition, factors affecting imputation accuracy may also be intensified in small populations. Therefore, we aimed to compare different imputation strate-gies for the Portuguese Holstein cattle population considering several commercially available single nucleotide poly-morphism (SNP) panels in a relatively small number of genotyped animals. Data from 1359 genotyped animals were used to evaluate imputation in 7 different scenarios. In the S1 to S6 scenarios, imputations were performed from LDv1, 50Kv1, 57K, 77K, HDv3 and Ax58K panels to 50Kv2 panel. In these scenarios, the bulls in 50Kv2 were divided into reference (352) and validation (101) populations based on the year of birth. In the S7 scenario, the validation population consisted of 566 cows genotyped with the Ax58K panel with theirgenotypes masked to LDv1. In general, all sample imputation accuracies were high with correlations ranging from 0.94 to 0.99 and concordance rate rang-ing from 92.59 to 98.18%. SNP-specific accuracy was consistent with that of sample imputation. S4 (40.32% of SNPs imputed) had higher accuracy than S2 and S3, both with less than 7.59% of SNPs imputed. Most probably, this was due to the high number of imputed SNPs with minor allele frequency (MAF) < 0.05 in S2 and S3 (by 18.43% and 16.06% higher than in S4, respectively). Therefore, for these two scenarios, MAF was more relevant than the panel density. These results suggest that genotype imputation using several commercially available SNP panels is feasible for the Portuguese national genomic evaluation. 650 $aDairy cattle 653 $aGenomic evaluation 653 $aImputation accuracy 700 1 $aSILVA, F. F. 700 1 $aSILVA, D. A. 700 1 $aSILVA, H. T. 700 1 $aCOSTA, C. N. 700 1 $aLOPES, P. S. 700 1 $aVERONEZE, R. 700 1 $aTHOMPSON, G. 700 1 $aCARVALHEIRA, J. 773 $tCzech Journal of Animal Science$gv. 64, n. 9, p. 377-386, 2019.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Hortaliças. Para informações adicionais entre em contato com cnph.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Hortaliças. |
Data corrente: |
17/05/1999 |
Data da última atualização: |
17/05/1999 |
Autoria: |
MAROUELLI, W. A.; OLIVEIRA, C. A. S.; SILVA, W. L. C. |
Afiliação: |
EMBRAPA-CNPH, Brasilia, DF. |
Título: |
Manejo da irrigacao na fase inicial da producao de sementes de cenoura pelo sistema de raiz-semente. |
Ano de publicação: |
1988 |
Fonte/Imprenta: |
Horticultura Brasileira, Brasilia, v.6, n.2, p.13-16, nov. 1988. |
Idioma: |
Português |
Palavras-Chave: |
Brasil; Brasilia; Carrot; Distrito Federal; Production. |
Thesagro: |
Cenoura; Cerrado; Daucus Carota; Irrigação; Produção; Semente. |
Thesaurus NAL: |
Brazil; irrigation; seeds. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00801naa a2200301 a 4500 001 1764011 005 1999-05-17 008 1988 bl uuuu u00u1 u #d 100 1 $aMAROUELLI, W. A. 245 $aManejo da irrigacao na fase inicial da producao de sementes de cenoura pelo sistema de raiz-semente. 260 $c1988 650 $aBrazil 650 $airrigation 650 $aseeds 650 $aCenoura 650 $aCerrado 650 $aDaucus Carota 650 $aIrrigação 650 $aProdução 650 $aSemente 653 $aBrasil 653 $aBrasilia 653 $aCarrot 653 $aDistrito Federal 653 $aProduction 700 1 $aOLIVEIRA, C. A. S. 700 1 $aSILVA, W. L. C. 773 $tHorticultura Brasileira, Brasilia$gv.6, n.2, p.13-16, nov. 1988.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Hortaliças (CNPH) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Expressão de busca inválida. Verifique!!! |
|
|