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Por favor, use este identificador para citar o enlazar este documento: https://ria.asturias.es/RIA/handle/123456789/12086
Título : Analysis of the existence of major genes affecting alpaca fiber traits
Autor : Pérez Cabal, M.
Cervantes, I.
Morante, R.
Burgos, A.
Goyache, F.
Gutiérrez, J. P.
Palabras clave : Alpaca
análisis de segregación
Fibra
Gen principal
Modelo de herencia mixta
Fecha de publicación : 2010
Editorial : Oxford University Press and American Society of Animal Science [Organización asociada]
Citación : Pérez Cabal, M... [et al.]. Analysis of the existence of major genes affecting alpaca fiber traits. Journal of Animal Science. 2010 ; 88 : 3783-3788
Resumen : The aim of this study was to determine the presence of major genes for fiber diameter (FD), SD of FD (SDFD), CV of FD, and comfort factor (CF) in Huacaya (HU) and Suri (SU) Peruvian alpaca breeds. Bayesian segregation analyses with relaxed transmission probabilities were performed using 1,906 and 6,592 available records for SU and HU breeds. Evidence for the presence of major genes was statistically supported when the 95% posterior density did not include zero. Significant major genes were found associated with decreased FD, SDFD, CV values, and increased CF values. Additive effects of the major genes were 4.18 and 4.23 μm for FD, 1.67 and 1.61 μm for SDFD, 3.32 and 3.76% for CV, and 15.03 and 14.90% for CF in HU and SU breeds, respectively. Dominance effects were −1.98 and −2.03 μm for FD, −0.88 and −1.11 μm for SDFD, −1.37 and −2.17% for CV, and 13.0 and 11.8% for CF in HU and SU breeds, respectively. Major gene variance was larger than the polygenic variance for all traits. Major gene allelic frequencies for FD, SDFD, and CV ranged from 0.81 to 0.86 for HU breed and from 0.70 to 0.77 for the SU breed and were 0.24 and 0.36, respectively, for CF. It can be concluded that a major gene affecting these traits could be segregating. Then, molecular identification and monitoring of animals carrying favorable genes throughout the worldwide alpaca population would allow for a quick genetic improvement.
URI : http://ria.asturias.es/RIA/handle/123456789/12086
ISSN : 0021-8812
Aparece en las colecciones: Agroalimentación y Ganadería

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