Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5337
Título: Variabilidade genética para características de lide na raça brava
Autor: Mocho, Sílvia Bernardo
Orientador: Gama, Luís Lavadinho Telo da
Lucas, António Vasco
Palavras-chave: Brava breed
tenta
genetic variability
demography
heritability
correlations
Data de Defesa: 2012
Editora: ISA/UTL
Citação: Mocho, S.B. - Variabilidade genética para características de lide na raça brava. Lisboa: ISA, 2012, 113 p.
Resumo: 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
URI: http://hdl.handle.net/10400.5/5337
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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