Avaliação da endogamia em um programa de melhoramento de codornas de corte

• Autor(a) principal: Sousa, Mariele Freitas
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5618
• topic: Coturnicultura; Consangüinidade; Avaliação genética; Coturnicultura; Consanguinity; Genetic evaluation; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::GENETICA E MELHORAMENTO DOS ANIMAIS DOMESTICOS

A total of 17,985 animals, within 8,746 quails from UFV1 strain and 9,239 from UFV2 strain, belonging to the Poultry Breeding Program of UFV were used to evaluate the effect of inbreeding on body weight characteristics at 28 and 42 days of age and egg production. The MTDFNRM (Multiple Trait Derivative Free Numerator Relationship Matrix) software, a system component of MTDFREML (Boldman et al., 1995), was used to process the records of the quails in numerical codes, so the identification number of the quail was always greater than the identification number of their parents, and to obtain the coefficient of inbreeding of it quail. The complete pedigree file was used to analyze the genetic structure of the population by mean of ENDOG v. 4.5 software (Gutiérrez and GOYACHE, 2008). The UFV1 strain showed an average F of 0.54%, anaverage relationship coefficient of 1.27% and 0.25% of increment or new inbreeding. The percentage of inbred this strain was 30.85% with an average F of 1.73%, ranging from 0.1% to 26.6%. The effective population size was 200.38 quails. The UFV2 strain showed an average F of 0.76%, an average relationship coefficient of 1.83% and 0.30% of increment or new inbreeding. The percentage of inbred quails for this strain was 45.54%, with an average F of 1.67%, ranging from 0.1% to 25.8%. The effective population size was 164.42. Inbreeding did not affect body weight at 28 and 42 days and egg production. The UFV genetic group 2 showed a lower effective population size, larger increment or new inbreeding, smaller effective population size than UFV1, requiring more accurate control in mating of the selected quails.