Fecha/hora: 31/05/2024 21:16:50

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 14/06/2022
Fecha de la última actualización: | 14/06/2022
Autoria: | DARTAYETE, A.; AGUILAR, I.; GIMENO, D.
Afiliación: | A. DARTAYETE, Private consultant.; IGNACIO AGUILAR GARCIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DIEGO GIMENO, Secretariado Uruguayo de la Lana, Montevideo, Uruguay.
Título: | Estimation of heritabilities and genetic correlations between weights and carcass traits in beef cattle in Uruguay. [764].
Año de publicación: | 2018
Fuente/Imprenta: | In: Proceedings of the World Congress on Genetics Applied to Livestock Production, 11., Aotea Centre Auckland, New Zealand: WCGALP, ICAR, 11-16 feb 2018.
Idioma: | Inglés

Contenido:

SUMMARY - A total of 1058 animals from 23 different breed combinations (86% steers, 14% heifers) were slaughtered with an average age of 2½ years between 1996 and 2001. Heritabilities and genetic correlations were estimated for the following traits: weight at 12, 15 and 18 months of age, slaughter and carcass weights (hot carcass weight, pistola weight, valuable cuts weight), ribeye area, subcutaneous fat thickness and subcutaneous fat thickness at P8. The posterior mean of the heritability for live weights increases with age, from 0.33 at 12mo to 0.58 at the slaughter weight. The hot carcass weight had the highest posterior mean of 0.64 followed by the pistola weight (0.57) and valuable cuts weight (0.34). The lowest estimates of heritability were for the fat traits; 0.22 for subcutaneous fat thickness and 0.18 for fat thickness at P8. Hot carcass weight presented high genetic correlations (> 0.7) with the live weight traits, while the pistola weight and the valuable cuts weight had practically equivalent correlation estimates with the live weight traits (> 0.65). This is supported by the genetic correlations obtained between the hot carcass weight, the pistola cut weight and the valuable cuts weight, which were 0.94 to 0.96. These results determine the possibility of using live weight measurements as selection criteria to improve  the hot carcass weight, so that the pistola cut weight and the valuable cuts will be improved. Likewise, the ribeye area would also be improved, while the subcutaneous fat  thickness would not be substantially modified. This would not be an inconvenience at present, considering the data provided by the industry regarding adequate
fat levels according to their demand, as well as the current conditions of production in the primary sector.

Palabras-Clave: | Beef cattle; Carcass; Fat; Genetic correlation; Heritability; Weights.
Categoría del tema: | L10 Genética y mejoramiento animal
URL: | http://www.ainfo.inia.uy/digital/bitstream/item/16519/1/dartayete-et-al-2018.pdf
Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (103101-1) - PXI - PC - DD - WCGALP/11/2018 -  -  - DIS