Data/hora: 20/06/2024 23:08:59

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 31/01/2007
Data da última atualização: | 31/01/2007
Autoria: | VOZZI, P. A.; MARCONDES, C. R.; MAGNABOSCO, C. de U.; BEZERRA, L. A. F.; LÔBO, R. B.
Título: | Structure and genetic variability in Nellore (Bos indicus) cattle by pedigree analysis.
Ano de publicação: | 2006
Fonte/Imprenta: | Genetics and Molecular Biology, Ribeirão Preto, v. 29, n. 3, p. 482-485, 2006.
Idioma: | Inglês
Conteúdo: | Parameters based on the probability of gene origin were used to describe the genetic variability in strains of Nellore and polled Nellore (Bos indicus) cattle that participated in the Program for Genetic Improvement of the Nellore Breed (Programa de Melhoramento Genético da Raça Nelore). The effective number of founders was 87,2 for Nellore and 107,9 for polled Nellore, while the number of ancestors was 59,8 for Nellore and 61,5 for polled Nellore and the remaining genomes were 39,4 for Nellore and 34,5 for polled Nellore cattle. The results indicate an intense use (by artificial insemination) of some sires and the absence of subdivisions in the population. The family structure in the two breeds was mainly caused by the genetic contribution of the same sires and only mating preferences for descendants of some founders are recorded in either breed. The results suggest that genetic variability needs monitoring in order to avoid the compromise of genetic improvement in economically important traits in the breeding program.
Thesagro: | Gado de Corte; Melhoramento Genético Animal; Variação Genética.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (27531-1) - UPC - SP - -- - CRI6981 -  - CRI6981 - DIS