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Publicação
Variabilidade genética para características de lide na raça brava
Autores
Orientador(es)
Resumo(s)
Functional records were collected in 584 heifers born between 2001 and 2009 in the Murteira
Grave herd of the Brava breed. These records were collected on the farm, in conditions known as “tenta”,
which intends to simulate a bullfight and serve as the basis for selection in this breed. The traits recorded
were physical type (trapío), bravery (bravura) and ability for bullfight (toureabilidade), which were scored
on a scale from 1 to 10. Additionally, a pedigree file was built for the herd, based on the records existing
in the Associação Portuguesa de Criadores de Touros de Lide. These records covered the period 1970-
2010, and included 4631 animals.
The demographic analysis indicates that the Murteira Grave herd has been able to maintain
inbreeding at very moderate levels (0.019±0.019), mostly by introducing animals from other herds
periodically. This has resulted in a well-structured population, with a diversified representation of several
founders and ancestors.
Taken together, the results of our study indicate that the tenta traits evaluated have high levels of
genetic variability (h2 =0.24 a 0.45), which provide the foundations for a good selection program with
appropriate response. On the other hand, the genetic correlations among the traits selected for are
positive, indicating that the improvement in one of the traits will not cause a deterioration in the others,
and that benefits will result from the joint selection for the different traits.
Descrição
Mestrado em Engenharia Zootécnica - Produção Animal - Instituto Superior de Agronomia / Faculdade de Medicina Veterinária
Palavras-chave
Brava breed tenta genetic variability demography heritability correlations
Contexto Educativo
Citação
Mocho, S.B. - Variabilidade genética para características de lide na raça brava. Lisboa: ISA, 2012, 113 p.