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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste; Embrapa Pecuária Sul. |
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Data corrente: |
16/06/2021 |
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Data da última atualização: |
17/06/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
HAEHLING, M. B.; TOSCANO, J. H. B.; GIRALDELO, L. A.; SANTOS, I. B.; ESTEVES, S. N.; BENAVIDES, M. V.; THOLON, P.; CHAGAS, A. C. de S. |
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Afiliação: |
MAREI BORSCH HAEHLING, UNESP; JOÃO HENRIQUE BARBOSA TOSCANO, UNESP; LUCIANA APARECIDA GIRALDELO, UNICEP; ISABELLA B. SANTOS, UNESP; SERGIO NOVITA ESTEVES, CPPSE; MAGDA VIEIRA BENAVIDES, CPPSUL; PATRICIA THOLON, CPPSE; ANA CAROLINA DE SOUZA CHAGAS, CPPSE. |
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Título: |
Is selection for resistance and resilience to Haemonchus contortus possible in Morada Nova sheep? |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Small Ruminant Research, v.201, aug. 2021, 106447. |
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Páginas: |
10 p. |
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ISSN: |
0921-4488 |
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DOI: |
doi.org/10.1016/j.smallrumres.2021.106447 |
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Idioma: |
Inglês |
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Conteúdo: |
Gastrointestinal nematodes (GIN) are a major constraint for sheep production. Selection of animals resistant to GIN infection is an effective and sustainable control strategy. In this study, the possibility of selection for resistance and resilience, as well as potential correlated responses, were evaluated. A total of 256 lambs and 123 ewes were submitted to two consecutive independent artificial infections with 4,000 infective larvae (L3) of Haemonchus contortus. Records of faecal egg count (FEC), packed cell volume (PCV), and body weight (BW) were taken serially until day 42 after infection in both challenges. Estimates of genetic parameters were obtained for individual records (in lambs) and for overall traits (in lambs and ewes) using mixed models. Phenotypic and genetic correlations were estimated between traits in lambs, with genetic correlations being based on estimated breeding values (EBVs). In addition, correlations between FEC in lambs and FEC in ewes, as well as PCV in lambs and ewes, were calculated. Heritability estimates for FEC in the first and second parasite challenge were, respectively, 0.25 ± 0.18 and 0.46 ± 0.19 for lambs, and 0.00 ± 0.09 and 0.20 ± 0.16 for ewes. For PCV, heritability estimates were 0.23 ± 0.14 and 0.32 ± 0.16 for lambs and 0.13 ± 0.11 and 0.37 ± 0.18 for ewes. For the overall daily weight gain (DWG), the heritability estimate was 0.70 ± 0.21. No significant genetic correlation was found between DWG and the other traits, while there was a negative genetic correlation between FEC and PCV (-0.70 ± 0.03). Genetic correlations of FEC and PCV between lambs and ewes were 0.36 ± 0.08 and 0.42 ± 0.08, respectively. The results of the present study suggest that selection for low FEC, high PCV and high BW/DWG is possible in Morada Nova lambs. Furthermore, selection for low FEC should have a correlated response on PCV (leading to higher PCV), while no correlated response is expected on DWG. Selection for low FEC in lambs would, in future generations, lead to higher resistance of lambs and also of ewes. Simultaneous selection for all three traits is possible in Morada Nova lambs, which would increase performance, decrease losses due to parasite infection and reduce the need for anthelmintic treatments, with beneficial consequences regarding selection pressure on parasite populations and productivity. MenosGastrointestinal nematodes (GIN) are a major constraint for sheep production. Selection of animals resistant to GIN infection is an effective and sustainable control strategy. In this study, the possibility of selection for resistance and resilience, as well as potential correlated responses, were evaluated. A total of 256 lambs and 123 ewes were submitted to two consecutive independent artificial infections with 4,000 infective larvae (L3) of Haemonchus contortus. Records of faecal egg count (FEC), packed cell volume (PCV), and body weight (BW) were taken serially until day 42 after infection in both challenges. Estimates of genetic parameters were obtained for individual records (in lambs) and for overall traits (in lambs and ewes) using mixed models. Phenotypic and genetic correlations were estimated between traits in lambs, with genetic correlations being based on estimated breeding values (EBVs). In addition, correlations between FEC in lambs and FEC in ewes, as well as PCV in lambs and ewes, were calculated. Heritability estimates for FEC in the first and second parasite challenge were, respectively, 0.25 ± 0.18 and 0.46 ± 0.19 for lambs, and 0.00 ± 0.09 and 0.20 ± 0.16 for ewes. For PCV, heritability estimates were 0.23 ± 0.14 and 0.32 ± 0.16 for lambs and 0.13 ± 0.11 and 0.37 ± 0.18 for ewes. For the overall daily weight gain (DWG), the heritability estimate was 0.70 ± 0.21. No significant genetic correlation was found between DWG and the other traits, while there wa... Mostrar Tudo |
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Palavras-Chave: |
Contagem de ovos fecais; Faecal egg count; Genetic parameters; Packed cell volume; Parâmetros genéticos; Parasite challenge; Volume de células embaladas. |
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Thesagro: |
Ganho de Peso; Haemonchus Contortus; Ovelha. |
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Thesaurus Nal: |
Fecal egg count; Parasites; Sheep; Weight gain. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/223811/1/Selection-Resistance-Resilience.pdf
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Marc: |
LEADER 03572naa a2200409 a 4500
001 2132335
005 2021-06-17
008 2021 bl uuuu u00u1 u #d
022 $a0921-4488
024 7 $adoi.org/10.1016/j.smallrumres.2021.106447$2DOI
100 1 $aHAEHLING, M. B.
245 $aIs selection for resistance and resilience to Haemonchus contortus possible in Morada Nova sheep?$h[electronic resource]
260 $c2021
300 $a10 p.
520 $aGastrointestinal nematodes (GIN) are a major constraint for sheep production. Selection of animals resistant to GIN infection is an effective and sustainable control strategy. In this study, the possibility of selection for resistance and resilience, as well as potential correlated responses, were evaluated. A total of 256 lambs and 123 ewes were submitted to two consecutive independent artificial infections with 4,000 infective larvae (L3) of Haemonchus contortus. Records of faecal egg count (FEC), packed cell volume (PCV), and body weight (BW) were taken serially until day 42 after infection in both challenges. Estimates of genetic parameters were obtained for individual records (in lambs) and for overall traits (in lambs and ewes) using mixed models. Phenotypic and genetic correlations were estimated between traits in lambs, with genetic correlations being based on estimated breeding values (EBVs). In addition, correlations between FEC in lambs and FEC in ewes, as well as PCV in lambs and ewes, were calculated. Heritability estimates for FEC in the first and second parasite challenge were, respectively, 0.25 ± 0.18 and 0.46 ± 0.19 for lambs, and 0.00 ± 0.09 and 0.20 ± 0.16 for ewes. For PCV, heritability estimates were 0.23 ± 0.14 and 0.32 ± 0.16 for lambs and 0.13 ± 0.11 and 0.37 ± 0.18 for ewes. For the overall daily weight gain (DWG), the heritability estimate was 0.70 ± 0.21. No significant genetic correlation was found between DWG and the other traits, while there was a negative genetic correlation between FEC and PCV (-0.70 ± 0.03). Genetic correlations of FEC and PCV between lambs and ewes were 0.36 ± 0.08 and 0.42 ± 0.08, respectively. The results of the present study suggest that selection for low FEC, high PCV and high BW/DWG is possible in Morada Nova lambs. Furthermore, selection for low FEC should have a correlated response on PCV (leading to higher PCV), while no correlated response is expected on DWG. Selection for low FEC in lambs would, in future generations, lead to higher resistance of lambs and also of ewes. Simultaneous selection for all three traits is possible in Morada Nova lambs, which would increase performance, decrease losses due to parasite infection and reduce the need for anthelmintic treatments, with beneficial consequences regarding selection pressure on parasite populations and productivity.
650 $aFecal egg count
650 $aParasites
650 $aSheep
650 $aWeight gain
650 $aGanho de Peso
650 $aHaemonchus Contortus
650 $aOvelha
653 $aContagem de ovos fecais
653 $aFaecal egg count
653 $aGenetic parameters
653 $aPacked cell volume
653 $aParâmetros genéticos
653 $aParasite challenge
653 $aVolume de células embaladas
700 1 $aTOSCANO, J. H. B.
700 1 $aGIRALDELO, L. A.
700 1 $aSANTOS, I. B.
700 1 $aESTEVES, S. N.
700 1 $aBENAVIDES, M. V.
700 1 $aTHOLON, P.
700 1 $aCHAGAS, A. C. de S.
773 $tSmall Ruminant Research$gv.201, aug. 2021, 106447.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
01/07/2005 |
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Data da última atualização: |
22/05/2006 |
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Autoria: |
VOLL, E.; SILVA, E. A. da; IMAI, N.; ANTUNIASSI, U. R. |
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Título: |
Estudo da variabilidade espacial de fatores determinantes do rendimento das culturas, em sistemas de produção com soja: plantas daninhas (12.2001.100-02). |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: SARAIVA, O. F. (Org.). Resultados de pesquisa da Embrapa Soja - 2003: manejo de solos, plantas daninhas e agricultura de precisão. Londrina: Embrapa Soja, 2004. |
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Páginas: |
p. 60. |
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Série: |
(Embrapa Soja. Documentos, 253). |
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Idioma: |
Português |
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Thesagro: |
Erva Daninha; Soja. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00736naa a2200193 a 4500
001 1464151
005 2006-05-22
008 2004 bl uuuu u00u1 u #d
100 1 $aVOLL, E.
245 $aEstudo da variabilidade espacial de fatores determinantes do rendimento das culturas, em sistemas de produção com soja$bplantas daninhas (12.2001.100-02).
260 $c2004
300 $ap. 60.
490 $a(Embrapa Soja. Documentos, 253).
650 $aErva Daninha
650 $aSoja
700 1 $aSILVA, E. A. da
700 1 $aIMAI, N.
700 1 $aANTUNIASSI, U. R.
773 $tIn: SARAIVA, O. F. (Org.). Resultados de pesquisa da Embrapa Soja - 2003: manejo de solos, plantas daninhas e agricultura de precisão. Londrina: Embrapa Soja, 2004.
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Embrapa Soja (CNPSO) |
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