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Registro Completo |
Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Caprinos e Ovinos. |
Data corrente: |
17/08/2021 |
Data da última atualização: |
17/08/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
PAIM, T. P.; PAIVA, S. R.; TOLEDO, N. M. de; YAMAGISHI, M. E. B.; CARNEIRO, P. L. S.; FACO, O.; ARAUJO, A. M. de; AZEVEDO, H. C.; CAETANO, A. R.; BRAGA, R. M.; McMANUS, C. |
Afiliação: |
UnB; SAMUEL REZENDE PAIVA, Cenargen; UnB; MICHEL EDUARDO BELEZA YAMAGISHI, CNPTIA; Universidade Estadual do Sudoeste da Bahia (Uesb) - Jequié, BA, Brazil; OLIVARDO FACO, CNPC; ADRIANA MELLO DE ARAUJO, CPAMN; HYMERSON COSTA AZEVEDO, CPATC; ALEXANDRE RODRIGUES CAETANO, Cenargen; RAMAYANA MENEZES BRAGA, CPAF-RR; UnB. |
Título: |
Origin and population structure of Brazilian hair sheep breeds. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Animal Genetics, v. 52, n. 4, p. 492-504, Aug. 2021. |
DOI: |
10.1111/age.1309 |
Idioma: |
Inglês |
Notas: |
Na publicação: M. B. Yamaghishi. |
Conteúdo: |
Summary. Brazilian hair sheep constitute a genetic diversity hotspot. These animals are found in the harsh environments of the Brazilian Northwest (semi-arid) region. Genotypes (50K SNP chip) from seven Brazilian sheep breeds (five hair and two coarse wool types) and 87 worldwide breeds were used to test for population structure, admixture and genetic
diversity. Moreover, phylogenetic trees evaluating migration events between genetic groups were built. Brazilian Somali, a fat-tailed breed, had a close relationship with East African
breeds and clustered distinctly from other Brazilian breeds. Brazilian Blackbelly and Barbados Blackbelly had a close relationship. The Morada Nova breed did not show close relationships with European or African breeds, revealing a single migration event from an Algerian hair breed. Brazilian Fat-tail and Morada Nova share a common ancestor, but the former showed introgressions from Brazilian Somali and Afrikaner breeds, explaining the fat-tail phenotype. The Santa In^es breed received a substantial contribution from Brazilian Bergamasca and showed an admixed origin with recent introgressions from other breeds, mainly from Suffolk. Furthermore, Brazilian Somali and Brazilian Fat-tail are the most endangered sheep genetic resources in Brazil and should be the focus for ex situ conservation programs. In conclusion, Brazilian hair sheep show an African origin and are characterized by diverse genetic composition, reinforcing the need for conservation of these genetic resources, and at the same time, this highly diverse group has variability that can be used in breeding programs. MenosSummary. Brazilian hair sheep constitute a genetic diversity hotspot. These animals are found in the harsh environments of the Brazilian Northwest (semi-arid) region. Genotypes (50K SNP chip) from seven Brazilian sheep breeds (five hair and two coarse wool types) and 87 worldwide breeds were used to test for population structure, admixture and genetic
diversity. Moreover, phylogenetic trees evaluating migration events between genetic groups were built. Brazilian Somali, a fat-tailed breed, had a close relationship with East African
breeds and clustered distinctly from other Brazilian breeds. Brazilian Blackbelly and Barbados Blackbelly had a close relationship. The Morada Nova breed did not show close relationships with European or African breeds, revealing a single migration event from an Algerian hair breed. Brazilian Fat-tail and Morada Nova share a common ancestor, but the former showed introgressions from Brazilian Somali and Afrikaner breeds, explaining the fat-tail phenotype. The Santa In^es breed received a substantial contribution from Brazilian Bergamasca and showed an admixed origin with recent introgressions from other breeds, mainly from Suffolk. Furthermore, Brazilian Somali and Brazilian Fat-tail are the most endangered sheep genetic resources in Brazil and should be the focus for ex situ conservation programs. In conclusion, Brazilian hair sheep show an African origin and are characterized by diverse genetic composition, reinforcing the need for conservation ... Mostrar Tudo |
Palavras-Chave: |
Conservation genetics; Genética de conservação; Genômica; Marcadores moleculares; Migração; Molecular markers; Raças de ovelhas; Recursos genéticos animais. |
Thesagro: |
Ovelha; Ovis Aries. |
Thesaurus Nal: |
Animal genetic resources; Gene flow; Genetic markers; Genomics; Population genetics; Sheep breeds. |
Categoria do assunto: |
G Melhoramento Genético |
Marc: |
LEADER 02912naa a2200457 a 4500 001 2133638 005 2021-08-17 008 2021 bl uuuu u00u1 u #d 024 7 $a10.1111/age.1309$2DOI 100 1 $aPAIM, T. P. 245 $aOrigin and population structure of Brazilian hair sheep breeds.$h[electronic resource] 260 $c2021 500 $aNa publicação: M. B. Yamaghishi. 520 $aSummary. Brazilian hair sheep constitute a genetic diversity hotspot. These animals are found in the harsh environments of the Brazilian Northwest (semi-arid) region. Genotypes (50K SNP chip) from seven Brazilian sheep breeds (five hair and two coarse wool types) and 87 worldwide breeds were used to test for population structure, admixture and genetic diversity. Moreover, phylogenetic trees evaluating migration events between genetic groups were built. Brazilian Somali, a fat-tailed breed, had a close relationship with East African breeds and clustered distinctly from other Brazilian breeds. Brazilian Blackbelly and Barbados Blackbelly had a close relationship. The Morada Nova breed did not show close relationships with European or African breeds, revealing a single migration event from an Algerian hair breed. Brazilian Fat-tail and Morada Nova share a common ancestor, but the former showed introgressions from Brazilian Somali and Afrikaner breeds, explaining the fat-tail phenotype. The Santa In^es breed received a substantial contribution from Brazilian Bergamasca and showed an admixed origin with recent introgressions from other breeds, mainly from Suffolk. Furthermore, Brazilian Somali and Brazilian Fat-tail are the most endangered sheep genetic resources in Brazil and should be the focus for ex situ conservation programs. In conclusion, Brazilian hair sheep show an African origin and are characterized by diverse genetic composition, reinforcing the need for conservation of these genetic resources, and at the same time, this highly diverse group has variability that can be used in breeding programs. 650 $aAnimal genetic resources 650 $aGene flow 650 $aGenetic markers 650 $aGenomics 650 $aPopulation genetics 650 $aSheep breeds 650 $aOvelha 650 $aOvis Aries 653 $aConservation genetics 653 $aGenética de conservação 653 $aGenômica 653 $aMarcadores moleculares 653 $aMigração 653 $aMolecular markers 653 $aRaças de ovelhas 653 $aRecursos genéticos animais 700 1 $aPAIVA, S. R. 700 1 $aTOLEDO, N. M. de 700 1 $aYAMAGISHI, M. E. B. 700 1 $aCARNEIRO, P. L. S. 700 1 $aFACO, O. 700 1 $aARAUJO, A. M. de 700 1 $aAZEVEDO, H. C. 700 1 $aCAETANO, A. R. 700 1 $aBRAGA, R. M. 700 1 $aMcMANUS, C. 773 $tAnimal Genetics$gv. 52, n. 4, p. 492-504, Aug. 2021.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
11/11/2022 |
Data da última atualização: |
11/11/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
PEIXOTO, M. G. C. D.; CARRARA, E. R.; LOPES, P. S.; BRUNELI, F. A. T.; PENNA, V. M. |
Afiliação: |
MARIA GABRIELA CAMPOLINA D PEIXOTO, CNPGL; EULA REGINA CARRARA, Universidade Federal de Viçosa; PAULO SÁVIO LOPES, Universidade Federal de Viçosa; FRANK ANGELO TOMITA BRUNELI, CNPGL; VÂNIA MALDINI PENNA, Centro Brasileiro de Melhoramento Genético do Guzerá. |
Título: |
The contribution of a MOET nucleus scheme for the improvement of Guzerá ( Bos indicus) cattle for milk traits in Brazil. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Frontiers in Genetics, v. 29, n. 13, 982858, 2022. |
DOI: |
https://doi.org/10.3389/fgene.2022.982858 |
Idioma: |
Inglês |
Conteúdo: |
The Guzerá breed evolved from the introduction of breeds from India, mainly the Kankrej breed, into Brazilian livestock at the end of the 19th century. Guzerá adapted well to the climatic conditions of Brazil, where it is considered a dual-purpose breed and has been used for pasture-based beef, milk or dual-purpose production systems with the use of low-medium inputs. The importance of this genetic resource for milk production in tropical regions moved breeders to implement the National Breeding Program for the Improvement of Guzerá in 1994, based on both progeny testing and MOET nucleus schemes. We sought to evaluate the role of the MOET nucleus scheme in the phenotypic and genetic progress for milk traits in this breed. The initial database used in the present study consisted of 6,513 cows, daughters of 761 bulls. We performed genetic evaluations with different datasets using a linear mixed model in a single trait analysis, including the relationship matrix, in order to estimate breeding values. Inbreeding coefficients were also calculated using the relationship of descent between two parents. Annual phenotypic, genetic and inbreeding trends were obtained for each dataset, considering the genetic pathways of both the bull and the cow. The low genetic progress found for milk yield in the whole population (5.27 ± 0.30 kg/year) partially accounted for the dual-purpose selection goal, despite the higher genetic progress in the MOET nucleus (9.39 ± 0.79 kg/year). The inbreeding coefficient was minimized at the beginning of the breeding program based on the use of new lineages. Posteriorly, it started increasing again from 0.002 in 1991 to 0.008 in 2019. The results provided evidence of the significant contribution of the MOET nucleus scheme for the phenotypic and genetic progress of Guzerá breed for milk traits, as well as of the impact of the breeding program on the inbreeding coefficient rate in the early years. New strategies need to be designed for the Guzerá breed, to allow for greater improvement of milk traits and minimizing the rate of the inbreeding coefficient. MenosThe Guzerá breed evolved from the introduction of breeds from India, mainly the Kankrej breed, into Brazilian livestock at the end of the 19th century. Guzerá adapted well to the climatic conditions of Brazil, where it is considered a dual-purpose breed and has been used for pasture-based beef, milk or dual-purpose production systems with the use of low-medium inputs. The importance of this genetic resource for milk production in tropical regions moved breeders to implement the National Breeding Program for the Improvement of Guzerá in 1994, based on both progeny testing and MOET nucleus schemes. We sought to evaluate the role of the MOET nucleus scheme in the phenotypic and genetic progress for milk traits in this breed. The initial database used in the present study consisted of 6,513 cows, daughters of 761 bulls. We performed genetic evaluations with different datasets using a linear mixed model in a single trait analysis, including the relationship matrix, in order to estimate breeding values. Inbreeding coefficients were also calculated using the relationship of descent between two parents. Annual phenotypic, genetic and inbreeding trends were obtained for each dataset, considering the genetic pathways of both the bull and the cow. The low genetic progress found for milk yield in the whole population (5.27 ± 0.30 kg/year) partially accounted for the dual-purpose selection goal, despite the higher genetic progress in the MOET nucleus (9.39 ± 0.79 kg/year). The inbreeding... Mostrar Tudo |
Palavras-Chave: |
Genetic progress; Phenotypic progress; Selection. |
Thesagro: |
Gado Leiteiro; Gado Zebu; Seleção. |
Thesaurus NAL: |
Dairy cattle. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1148200/1/The-contribution-of-a-MOET-nucleus-scheme-for-the-improvement-of-Guzera.pdf
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Marc: |
LEADER 02928naa a2200265 a 4500 001 2148200 005 2022-11-11 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.3389/fgene.2022.982858$2DOI 100 1 $aPEIXOTO, M. G. C. D. 245 $aThe contribution of a MOET nucleus scheme for the improvement of Guzerá ( Bos indicus) cattle for milk traits in Brazil.$h[electronic resource] 260 $c2022 520 $aThe Guzerá breed evolved from the introduction of breeds from India, mainly the Kankrej breed, into Brazilian livestock at the end of the 19th century. Guzerá adapted well to the climatic conditions of Brazil, where it is considered a dual-purpose breed and has been used for pasture-based beef, milk or dual-purpose production systems with the use of low-medium inputs. The importance of this genetic resource for milk production in tropical regions moved breeders to implement the National Breeding Program for the Improvement of Guzerá in 1994, based on both progeny testing and MOET nucleus schemes. We sought to evaluate the role of the MOET nucleus scheme in the phenotypic and genetic progress for milk traits in this breed. The initial database used in the present study consisted of 6,513 cows, daughters of 761 bulls. We performed genetic evaluations with different datasets using a linear mixed model in a single trait analysis, including the relationship matrix, in order to estimate breeding values. Inbreeding coefficients were also calculated using the relationship of descent between two parents. Annual phenotypic, genetic and inbreeding trends were obtained for each dataset, considering the genetic pathways of both the bull and the cow. The low genetic progress found for milk yield in the whole population (5.27 ± 0.30 kg/year) partially accounted for the dual-purpose selection goal, despite the higher genetic progress in the MOET nucleus (9.39 ± 0.79 kg/year). The inbreeding coefficient was minimized at the beginning of the breeding program based on the use of new lineages. Posteriorly, it started increasing again from 0.002 in 1991 to 0.008 in 2019. The results provided evidence of the significant contribution of the MOET nucleus scheme for the phenotypic and genetic progress of Guzerá breed for milk traits, as well as of the impact of the breeding program on the inbreeding coefficient rate in the early years. New strategies need to be designed for the Guzerá breed, to allow for greater improvement of milk traits and minimizing the rate of the inbreeding coefficient. 650 $aDairy cattle 650 $aGado Leiteiro 650 $aGado Zebu 650 $aSeleção 653 $aGenetic progress 653 $aPhenotypic progress 653 $aSelection 700 1 $aCARRARA, E. R. 700 1 $aLOPES, P. S. 700 1 $aBRUNELI, F. A. T. 700 1 $aPENNA, V. M. 773 $tFrontiers in Genetics$gv. 29, n. 13, 982858, 2022.
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