Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
19/09/2007 |
Data da última atualização: |
19/09/2007 |
Autoria: |
MAN, W. Y. N.; LEWIS, R. M.; BOULTON, K.; VILLANUEVA, B. |
Título: |
Genetic conseguences of selecting on PrP genotypes on terminal sire and hill sheep breeds. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
In: WORLD CONGRESS ON GENETICS APPLIED TO LIVESTOCK PRODUCTION, 8., 2006, Belo Horizonte, MG. Proceedings... Belo Horizonte: Instituto Prociência, 2006. 4 f. 1 CD-ROM. |
Idioma: |
Inglês |
Conteúdo: |
The current study aims to assess the impact of various PrP selection strategies on PrP allele frequencies, inbreeding and genetic gain in performance traits in terminal sire and hill sheep populations typical of those participating in sire referencing schemes. When PrP selection was targeted against VRQ genotypes only and the VRQ allele frequency was 30% or less, there was minimal impact on genetic gain and inbreeding. However, genetic gain was affected with selection in favour of the ARR allele when the frequency of this allele was below 60%. In general, inbreeding was unaffected by PrP selection as this selection was counter-balanced by a weaker selection on the performance trait when compared with the scenario when there was no selection on PrP. |
Palavras-Chave: |
PrP. |
Thesagro: |
Genótipo; Melhoramento Genético Animal; Ovino; Sistema Nervoso. |
Thesaurus Nal: |
scrapie. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01498naa a2200229 a 4500 001 1533394 005 2007-09-19 008 2006 bl uuuu u00u1 u #d 100 1 $aMAN, W. Y. N. 245 $aGenetic conseguences of selecting on PrP genotypes on terminal sire and hill sheep breeds. 260 $c2006 520 $aThe current study aims to assess the impact of various PrP selection strategies on PrP allele frequencies, inbreeding and genetic gain in performance traits in terminal sire and hill sheep populations typical of those participating in sire referencing schemes. When PrP selection was targeted against VRQ genotypes only and the VRQ allele frequency was 30% or less, there was minimal impact on genetic gain and inbreeding. However, genetic gain was affected with selection in favour of the ARR allele when the frequency of this allele was below 60%. In general, inbreeding was unaffected by PrP selection as this selection was counter-balanced by a weaker selection on the performance trait when compared with the scenario when there was no selection on PrP. 650 $ascrapie 650 $aGenótipo 650 $aMelhoramento Genético Animal 650 $aOvino 650 $aSistema Nervoso 653 $aPrP 700 1 $aLEWIS, R. M. 700 1 $aBOULTON, K. 700 1 $aVILLANUEVA, B. 773 $tIn: WORLD CONGRESS ON GENETICS APPLIED TO LIVESTOCK PRODUCTION, 8., 2006, Belo Horizonte, MG. Proceedings... Belo Horizonte: Instituto Prociência, 2006. 4 f. 1 CD-ROM.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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