| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
21/12/2017 |
|
Data da última atualização: |
21/12/2017 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
TONUSSI, R. L.; SILVA, R. M. de O.; MAGALHAES, A. F. B.; ESPIGOLAN, R.; PERIPOLLI, E.; OLIVIERI, B. F.; FEITOSA, F. L. B.; LEMOS, M. V. A.; BERTON, M. P.; CHIAIA, H. L. J.; PEREIRA, A. S. C.; LOBO, R. B.; BEZERRA, L. A. F.; MAGNABOSCO, C. de U.; LOURENÇO, D. A. L.; AGUILAR, I.; BALDI REY, F. S. |
|
Afiliação: |
RAFAEL LARA TONUSSI, UNESP; RAFAEL MEDEIROS DE OLIVEIRA SILVA, UNESP; ANA FABRÍCIA BRAGA MAGALHÃES, UNESP; RAFAEL ESPIGOLAN, UNESP; ELISA PERIPOLLI, UNESP; BIANCA FERREIRA OLIVIERI, UNESP; FABIELI LOISE BRAGA FEITOSA, UNESP; MARCOS VINICÍUS ANTUNES LEMOS, UNESP; MARIANA PIATTO BERTON, UNESP; HERMENEGILDO LUCAS JUSTINO CHIAIA, UNESP; ANGELICA SIMONE CRAVO PEREIRA, USP; RAYSILDO BARBOSA LÔBO, ANCP; LUIZ ANTÔNIO FRAMARTINO BEZERRA, USP; CLAUDIO DE ULHOA MAGNABOSCO, CPAC; DANIELA ANDRESSA LINO LOURENÇO, University of Georgia; IGNÁCIO AGUILAR, INIA; FERNANDO SEBASTIÁN BALDI REY, UNESP. |
|
Título: |
Application of single step genomic BLUP under different uncertain paternity scenarios using simulated data. |
|
Ano de publicação: |
2017 |
|
Fonte/Imprenta: |
PLoS ONE, v. 12, n. 9, e0181752, 28 September 2017. |
|
DOI: |
https://doi.org/10.1371/journal.pone.0181752 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The objective of this study was to investigate the application of BLUP and single step genomic BLUP (ssGBLUP) models in different scenarios of paternity uncertainty with different strategies of scaling the G matrix to match the A22 matrix, using simulated data for beef cattle. Genotypes, pedigree, and phenotypes for age at first calving (AFC) and weight at 550 days (W550) were simulated using heritabilities based on real data (0.12 for AFC and 0.34 for W550). Paternity uncertainty scenarios using 0, 25, 50, 75, and 100% of multiple sires (MS) were studied. The simulated genome had a total length of 2,333 cM, containing 735,293 biallelic markers and 7,000 QTLs randomly distributed over the 29 BTA. It was assumed that QTLs explained 100% of the genetic variance. For QTL, the amount of alleles per loci randomly ranged from two to four. The BLUP model that considers phenotypic and pedigree data, and the ssGBLUP model that combines phenotypic, pedigree and genomic information were used for genetic evaluations. Four ways of scaling the mean of the genomic matrix (G) to match to the mean of the pedigree relationship matrix among genotyped animals (A22) were tested. Accuracy, bias, and inflation were investigated for five groups of animals: ALL = all animals; BULL = only bulls; GEN = genotyped animals; FEM = females; and YOUNG = young males. With the BLUP model, the accuracies of genetic evaluations decreased for both traits as the proportion of unknown sires in the population increased. The EBV accuracy reduction was higher for GEN and YOUNG groups. By analyzing the scenarios for YOUNG (from 0 to 100% of MS), the decrease was 87.8 and 86% for AFC and W550, respectively. When applying the ssGBLUP model, the accuracies of genetic evaluation also decreased as the MS in the pedigree for both traits increased. However, the accuracy reduction was less than those observed for BLUP model. Using the same comparison (scenario 0 to 100% of MS), the accuracies reductions were 38 and 44.6% for AFC and W550, respectively. There were no differences between the strategies for scaling the G matrix for ALL, BULL, and FEM groups under the different scenarios with missing pedigree. These results pointed out that the uninformative part of the A22 matrix and genotyped animals with paternity uncertainty did not influence the scaling of G matrix. On the basis of the results, it is important to have a G matrix in the same scale of the A22 matrix, especially for the evaluation of young animals in situations with missing pedigree information. In these situations, the ssGBLUP model is an appropriate alternative to obtain a more reliable and less biased estimate of breeding values, especially for young animals with few or no phenotypic records. For accurate and unbiased genomic predictions with ssGBLUP, it is necessary to assure that the G matrix is compatible with the A22 matrix, even in situations with paternity uncertainty. MenosThe objective of this study was to investigate the application of BLUP and single step genomic BLUP (ssGBLUP) models in different scenarios of paternity uncertainty with different strategies of scaling the G matrix to match the A22 matrix, using simulated data for beef cattle. Genotypes, pedigree, and phenotypes for age at first calving (AFC) and weight at 550 days (W550) were simulated using heritabilities based on real data (0.12 for AFC and 0.34 for W550). Paternity uncertainty scenarios using 0, 25, 50, 75, and 100% of multiple sires (MS) were studied. The simulated genome had a total length of 2,333 cM, containing 735,293 biallelic markers and 7,000 QTLs randomly distributed over the 29 BTA. It was assumed that QTLs explained 100% of the genetic variance. For QTL, the amount of alleles per loci randomly ranged from two to four. The BLUP model that considers phenotypic and pedigree data, and the ssGBLUP model that combines phenotypic, pedigree and genomic information were used for genetic evaluations. Four ways of scaling the mean of the genomic matrix (G) to match to the mean of the pedigree relationship matrix among genotyped animals (A22) were tested. Accuracy, bias, and inflation were investigated for five groups of animals: ALL = all animals; BULL = only bulls; GEN = genotyped animals; FEM = females; and YOUNG = young males. With the BLUP model, the accuracies of genetic evaluations decreased for both traits as the proportion of unknown sires in the population incre... Mostrar Tudo |
|
Palavras-Chave: |
Best Linear Unbiased Prediction. |
|
Thesagro: |
Citogenética Animal; Gado de Corte; Hereditariedade; Seleção Fenótipa. |
|
Categoria do assunto: |
G Melhoramento Genético |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/169502/1/Application-of-single-step-genomic-BLUP-under-different-uncertain-paternity-scenarios-using-simulated-data..pdf
|
|
Marc: |
LEADER 04121naa a2200385 a 4500
001 2083177
005 2017-12-21
008 2017 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1371/journal.pone.0181752$2DOI
100 1 $aTONUSSI, R. L.
245 $aApplication of single step genomic BLUP under different uncertain paternity scenarios using simulated data.$h[electronic resource]
260 $c2017
520 $aThe objective of this study was to investigate the application of BLUP and single step genomic BLUP (ssGBLUP) models in different scenarios of paternity uncertainty with different strategies of scaling the G matrix to match the A22 matrix, using simulated data for beef cattle. Genotypes, pedigree, and phenotypes for age at first calving (AFC) and weight at 550 days (W550) were simulated using heritabilities based on real data (0.12 for AFC and 0.34 for W550). Paternity uncertainty scenarios using 0, 25, 50, 75, and 100% of multiple sires (MS) were studied. The simulated genome had a total length of 2,333 cM, containing 735,293 biallelic markers and 7,000 QTLs randomly distributed over the 29 BTA. It was assumed that QTLs explained 100% of the genetic variance. For QTL, the amount of alleles per loci randomly ranged from two to four. The BLUP model that considers phenotypic and pedigree data, and the ssGBLUP model that combines phenotypic, pedigree and genomic information were used for genetic evaluations. Four ways of scaling the mean of the genomic matrix (G) to match to the mean of the pedigree relationship matrix among genotyped animals (A22) were tested. Accuracy, bias, and inflation were investigated for five groups of animals: ALL = all animals; BULL = only bulls; GEN = genotyped animals; FEM = females; and YOUNG = young males. With the BLUP model, the accuracies of genetic evaluations decreased for both traits as the proportion of unknown sires in the population increased. The EBV accuracy reduction was higher for GEN and YOUNG groups. By analyzing the scenarios for YOUNG (from 0 to 100% of MS), the decrease was 87.8 and 86% for AFC and W550, respectively. When applying the ssGBLUP model, the accuracies of genetic evaluation also decreased as the MS in the pedigree for both traits increased. However, the accuracy reduction was less than those observed for BLUP model. Using the same comparison (scenario 0 to 100% of MS), the accuracies reductions were 38 and 44.6% for AFC and W550, respectively. There were no differences between the strategies for scaling the G matrix for ALL, BULL, and FEM groups under the different scenarios with missing pedigree. These results pointed out that the uninformative part of the A22 matrix and genotyped animals with paternity uncertainty did not influence the scaling of G matrix. On the basis of the results, it is important to have a G matrix in the same scale of the A22 matrix, especially for the evaluation of young animals in situations with missing pedigree information. In these situations, the ssGBLUP model is an appropriate alternative to obtain a more reliable and less biased estimate of breeding values, especially for young animals with few or no phenotypic records. For accurate and unbiased genomic predictions with ssGBLUP, it is necessary to assure that the G matrix is compatible with the A22 matrix, even in situations with paternity uncertainty.
650 $aCitogenética Animal
650 $aGado de Corte
650 $aHereditariedade
650 $aSeleção Fenótipa
653 $aBest Linear Unbiased Prediction
700 1 $aSILVA, R. M. de O.
700 1 $aMAGALHAES, A. F. B.
700 1 $aESPIGOLAN, R.
700 1 $aPERIPOLLI, E.
700 1 $aOLIVIERI, B. F.
700 1 $aFEITOSA, F. L. B.
700 1 $aLEMOS, M. V. A.
700 1 $aBERTON, M. P.
700 1 $aCHIAIA, H. L. J.
700 1 $aPEREIRA, A. S. C.
700 1 $aLOBO, R. B.
700 1 $aBEZERRA, L. A. F.
700 1 $aMAGNABOSCO, C. de U.
700 1 $aLOURENÇO, D. A. L.
700 1 $aAGUILAR, I.
700 1 $aBALDI REY, F. S.
773 $tPLoS ONE$gv. 12, n. 9, e0181752, 28 September 2017.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Gado de Corte. |
|
Data corrente: |
22/06/2010 |
|
Data da última atualização: |
06/06/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 2 |
|
Autoria: |
SILVEIRA, M. C. T. da; NASCIMENTO JÚNIOR, D. do; SILVA, S. C. da; EUCLIDES, V. P. B.; MONTAGNER, D. B.; SBRISSIA, A. F.; RODRIGUES. C. S.; SOUSA, B. M. de L.; PENA, K. da S.; VILELA, H. H. |
|
Afiliação: |
MÁRCIA CRISTINA TEIXEIRA DA SILVEIRA, UNIVERSIDADE FEDERAL DE VIÇOSA; DOMICIO DO NASCIMENTO JÚNIOR, UNIVERSIDADE FEDERAL DE VIÇOSA; SILA CARNEIRO DA SILVA, ESCOLA SUPERIOR DE AGRICULTURA "LUIZ DE QUEIROZ"; VALERIA PACHECO BATISTA EUCLIDES, CNPGC; DENISE BAPTAGLIN MONTAGNER, CNPGC; ANDRÉ FISCHER SBRISSIA, UNIVERSIDADE DO ESTADO DE SANTA CATARINA; CARLINDO SANTOS RODRIGUES, UNIVERSIDADE FEDERAL DE VIÇOSA; BRÁULIO MAIA DE LANA SOUSA, UNIVERSIDADE FEDERAL DE VIÇOSA; KARINE DA SILVA PENA, UNIVERSIDADE FEDERAL DE VIÇOSA; HÉLIO HENRIQUE VILELA, UNIVERSIDADE FEDERAL DE VIÇOSA. |
|
Título: |
Morphogenetic and structural comparative characterization of tropical forage grass cultivars under free growth. |
|
Ano de publicação: |
2010 |
|
Fonte/Imprenta: |
Scientia Agricola, v. 67, n. 2, p. 136-142, Mar./Abr. 2010. |
|
Idioma: |
Inglês |
|
Conteúdo: |
ABSTRACT - Understanding of the morphogenetic characteristics allows comprehension of aspects related to the form and function of forage plants, providing opportunities to identify potentially high productive plants and distinct defoliation management requirements. The objective of this experiment was to carry out a comparative study of ten tropical forage grasses using morphogenetic and structural variables. Treatments corresponded to grasses of the Panicum genus (P. maximum cultivars Tanzânia and Mombaça) and the Brachiaria genus (B. brizantha cultivars Piatã, Marandu, Xaraés, Capiporã and Arapoty; B. decumbens cultivar Basilisk; B. humidicola cultivars Comum and Tupi), evaluated under free growth conditions.. Response variables were leaf appearance and elongation rates, phyllochron, stem elongation rate, final leaf length, number of live leaves per tiller, leaf life span and tiller appearance, death and survival rates. There was difference between cultivars for these variables, indicating a large variability within plants. Considering the morphogenetic and structural variables of leaves and tillers, B. brizantha had a similar pattern of variation to those of P. maximum, and B. Decumbens, similar to those of B. humidicola. Tiller appearance was large at the onset of the experiment and second and third generations comprised the large majority of tiller population for the cultivars Mombaça, Tanzânia, Xaraés and Capiporã. Group analysis based on plant morphogenetic and structural characteristics of leaves and tillers was an interesting way of grouping cultivars, indicating the importance and the potential of using morphogenesis in plant selection and evaluation programmes. RESUMO - O estudo das características morfogênicas permite compreender aspectos relativos à forma e função das plantas forrageiras além de possibilitar identificar plantas com potenciais produtivos e exigências de manejo diferentes. O objetivo deste trabalho foi avaliar, comparativamente, dez plantas forrageiras tropicais por meio de variáveis morfogênicas e estruturais. Os tratamentos corresponderam a cultivares pertencentes ao gênero Panicum (P. maximum cvs. Tanzânia e Mombaça) e ao gênero Brachiaria (B. brizantha cvs. Piatã, Marandu, Xaraés, Capiporã, e Arapoty; B. decumbens cv. Basilisk; B. humidicola cvs. Comum e Tupi), avaliados sob condições de crescimento livre. Foram avaliadas a taxa de aparecimento e alongamento de folhas, filocrono, taxa de alongamento de colmos, comprimento final da lâmina foliar, número de folhas vivas por perfilho, duração de vida das folhas e padrão demográfico de perfilhamento. Houve diferença entre cultivares para as variáveis, indicando grande variabilidade no material estudado. Considerando as características morfogênicas e estruturais de folhas e perfilhos, as B. brizantha apresentaram comportamento parecido com os P. maximum, e B. decumbens mais próximo das B. humidicola. Verificou-se que o aparecimento de perfilhos foi inicialmente elevado e que a segunda e, ou, terceira gerações contribuíram de forma significativa para o número total de perfilhos dos cultivares Mombaça, Tanzânia, Xaraés e Capiporã. A análise de agrupamento baseada nas características morfogênicas e estruturais de folhas e perfilhos foi um método interessante para agrupar cultivares, demonstrando a importância e o potencial de uso da morfogênese em trabalhos de seleção e avaliação de plantas forrageiras. MenosABSTRACT - Understanding of the morphogenetic characteristics allows comprehension of aspects related to the form and function of forage plants, providing opportunities to identify potentially high productive plants and distinct defoliation management requirements. The objective of this experiment was to carry out a comparative study of ten tropical forage grasses using morphogenetic and structural variables. Treatments corresponded to grasses of the Panicum genus (P. maximum cultivars Tanzânia and Mombaça) and the Brachiaria genus (B. brizantha cultivars Piatã, Marandu, Xaraés, Capiporã and Arapoty; B. decumbens cultivar Basilisk; B. humidicola cultivars Comum and Tupi), evaluated under free growth conditions.. Response variables were leaf appearance and elongation rates, phyllochron, stem elongation rate, final leaf length, number of live leaves per tiller, leaf life span and tiller appearance, death and survival rates. There was difference between cultivars for these variables, indicating a large variability within plants. Considering the morphogenetic and structural variables of leaves and tillers, B. brizantha had a similar pattern of variation to those of P. maximum, and B. Decumbens, similar to those of B. humidicola. Tiller appearance was large at the onset of the experiment and second and third generations comprised the large majority of tiller population for the cultivars Mombaça, Tanzânia, Xaraés and Capiporã. Group analysis based on plant morphogenetic and struct... Mostrar Tudo |
|
Palavras-Chave: |
Braquiária. |
|
Thesagro: |
Brachiaria Brizantha; Brachiaria Decumbens; Brachiaria Humidicola; Gramínea Forrageira; Morfogênese; Panicum Maximum; Pastagem; Planta Forrageira. |
|
Thesaurus NAL: |
Forage grasses; Morphogenesis; Panicum. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/855795/1/Morphogenetic-structural-comparative-2010.pdf
|
|
Marc: |
LEADER 04582naa a2200373 a 4500
001 1855795
005 2023-06-06
008 2010 bl uuuu u00u1 u #d
100 1 $aSILVEIRA, M. C. T. da
245 $aMorphogenetic and structural comparative characterization of tropical forage grass cultivars under free growth.
260 $c2010
520 $aABSTRACT - Understanding of the morphogenetic characteristics allows comprehension of aspects related to the form and function of forage plants, providing opportunities to identify potentially high productive plants and distinct defoliation management requirements. The objective of this experiment was to carry out a comparative study of ten tropical forage grasses using morphogenetic and structural variables. Treatments corresponded to grasses of the Panicum genus (P. maximum cultivars Tanzânia and Mombaça) and the Brachiaria genus (B. brizantha cultivars Piatã, Marandu, Xaraés, Capiporã and Arapoty; B. decumbens cultivar Basilisk; B. humidicola cultivars Comum and Tupi), evaluated under free growth conditions.. Response variables were leaf appearance and elongation rates, phyllochron, stem elongation rate, final leaf length, number of live leaves per tiller, leaf life span and tiller appearance, death and survival rates. There was difference between cultivars for these variables, indicating a large variability within plants. Considering the morphogenetic and structural variables of leaves and tillers, B. brizantha had a similar pattern of variation to those of P. maximum, and B. Decumbens, similar to those of B. humidicola. Tiller appearance was large at the onset of the experiment and second and third generations comprised the large majority of tiller population for the cultivars Mombaça, Tanzânia, Xaraés and Capiporã. Group analysis based on plant morphogenetic and structural characteristics of leaves and tillers was an interesting way of grouping cultivars, indicating the importance and the potential of using morphogenesis in plant selection and evaluation programmes. RESUMO - O estudo das características morfogênicas permite compreender aspectos relativos à forma e função das plantas forrageiras além de possibilitar identificar plantas com potenciais produtivos e exigências de manejo diferentes. O objetivo deste trabalho foi avaliar, comparativamente, dez plantas forrageiras tropicais por meio de variáveis morfogênicas e estruturais. Os tratamentos corresponderam a cultivares pertencentes ao gênero Panicum (P. maximum cvs. Tanzânia e Mombaça) e ao gênero Brachiaria (B. brizantha cvs. Piatã, Marandu, Xaraés, Capiporã, e Arapoty; B. decumbens cv. Basilisk; B. humidicola cvs. Comum e Tupi), avaliados sob condições de crescimento livre. Foram avaliadas a taxa de aparecimento e alongamento de folhas, filocrono, taxa de alongamento de colmos, comprimento final da lâmina foliar, número de folhas vivas por perfilho, duração de vida das folhas e padrão demográfico de perfilhamento. Houve diferença entre cultivares para as variáveis, indicando grande variabilidade no material estudado. Considerando as características morfogênicas e estruturais de folhas e perfilhos, as B. brizantha apresentaram comportamento parecido com os P. maximum, e B. decumbens mais próximo das B. humidicola. Verificou-se que o aparecimento de perfilhos foi inicialmente elevado e que a segunda e, ou, terceira gerações contribuíram de forma significativa para o número total de perfilhos dos cultivares Mombaça, Tanzânia, Xaraés e Capiporã. A análise de agrupamento baseada nas características morfogênicas e estruturais de folhas e perfilhos foi um método interessante para agrupar cultivares, demonstrando a importância e o potencial de uso da morfogênese em trabalhos de seleção e avaliação de plantas forrageiras.
650 $aForage grasses
650 $aMorphogenesis
650 $aPanicum
650 $aBrachiaria Brizantha
650 $aBrachiaria Decumbens
650 $aBrachiaria Humidicola
650 $aGramínea Forrageira
650 $aMorfogênese
650 $aPanicum Maximum
650 $aPastagem
650 $aPlanta Forrageira
653 $aBraquiária
700 1 $aNASCIMENTO JÚNIOR, D. do
700 1 $aSILVA, S. C. da
700 1 $aEUCLIDES, V. P. B.
700 1 $aMONTAGNER, D. B.
700 1 $aSBRISSIA, A. F.
700 1 $aRODRIGUES. C. S.
700 1 $aSOUSA, B. M. de L.
700 1 $aPENA, K. da S.
700 1 $aVILELA, H. H.
773 $tScientia Agricola$gv. 67, n. 2, p. 136-142, Mar./Abr. 2010.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Corte (CNPGC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
|
|
Registro completo
|
Biblioteca(s): |
Catálogo Coletivo de Periódicos Embrapa; Embrapa Trigo. |
|
Identificador: |
1179 |
|
Data corrente: |
09/05/2002 |
|
Data da última atualização: |
09/05/2002 |
|
Código do título: |
0600633 |
|
Título e Subtítulo: |
AUSTRALIAN SEPTORIA NEWSLETTER |
|
Entidade: |
Wheat Industry Research Council of Australia |
|
Local de publicação: |
Australia |
|
Periodicidade: |
trimestral |
|
Coleções da unidade: |
Embrapa Trigo
1977/94 1977(7-8); 1978(9-10); 1979(11); 1980(12-13); 1981(14-16); 1982(17-18); 1983(19-20); 1984(21-22); 1985(23-24); 1986(25-26); 1987(27-28); 1988(29-30); 1989(31-32); 1990(33-34); 1991(35-36); 1992(37-38); 1993(39-40); 1994(41-42).
Classificação: 632.05 |
|
Fechar
|
|
|
