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Reproductive deficiency in bulls from synthetic breeds according to the type of crossbreed and the morphology of the Y chromosome
Horn, Marilise M; Moraes, José C. F; Jaume, Carlos M; Edelweiss, Maria I. A; Rosado, Adriano.
Afiliação
  • Horn, Marilise M; Universidade Federal do Rio Grande do Sul. Faculdade de Veterinária. Porto Alegre. BR
  • Moraes, José C. F; Embrapa Pecuária Sul. Bagé. BR
  • Jaume, Carlos M; Embrapa Pecuária Sul. Bagé. BR
  • Edelweiss, Maria I. A; Universidade Federal do Rio Grande do Sul. Faculdade de Medicina. Departamento de Patologia. Porto Alegre. BR
  • Rosado, Adriano; s.af
Genet. mol. biol ; Genet. mol. biol;28(2): 225-229, 2005. tab
Article em En | LILACS | ID: lil-416289
Biblioteca responsável: BR1.1
RESUMO
We used 550 Braford and 214 Brangus-Ibagé bulls to study the association between Y chromosome morphology and the evaluation of breeding-soundness, karyotyping and breeding records were used to assess Y chromosome morphology. In general, no direct association was detected between the individual type of Y chromosome and reproductive fitness as previously estimated through breeding soundness examination. The type of breeding strategy used to form the synthetic breeds was also analyzed. The Braford breed is about 3/8 Zebu (Bos taurus indicus) and 5/8 Hereford (Bos taurus taurus) but when the breeding strategy used 1/4 Zebu animals to produce Braford bulls which were 3/8 Zebu a greater percentage of the bulls had to be culled due to reproductive problems. Our study shows that certain interactions between genotypes can be detrimental to the reproductive efficiency of 3/8 Zebu animals and that breeding strategies avoiding or favoring certain genotypes can be used to reduce the percentage of bulls from synthetic breeds that are culled due to problems with semen quality.
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Texto completo: 1 Coleções: 01-internacional Base de dados: LILACS Assunto principal: Cromossomo Y / Cruzamento / Bovinos Limite: Animals Idioma: En Revista: Genet. mol. biol Assunto da revista: GENETICA Ano de publicação: 2005 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Texto completo
Adicionar na Minha BVS
Imprimir
XML
Buscar no Google
Texto completo: 1 Coleções: 01-internacional Base de dados: LILACS Assunto principal: Cromossomo Y / Cruzamento / Bovinos Limite: Animals Idioma: En Revista: Genet. mol. biol Assunto da revista: GENETICA Ano de publicação: 2005 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil