Artículos de revistas
Selection criteria comparison for Suffolk Down sheep under range management in central Chile Comparación de criterios de selección para ovinos Suffolk Down manejados en condiciones extensivas en la zona central de Chile
Fecha
2014Registro en:
Archivos de Medicina Veterinaria, Volumen 46, Issue 2, 2018, Pages 239-246
07176201
0301732X
Autor
Lembeye, F.
Castellaro, G.
Magofke, J. C.
Uribe, H.
Institución
Resumen
© 2014, Universidad Austral de Chile. All rights reserved. The aim of this study was to calculate selection indexes for a specialised meat sheep breed, Suffolk Down under range management in Central Chile. A selection index was constructed and relative economic weights for each trait were estimated. Genetic parameters were obtained from the literature and phenotypic parameters were estimated from the available data (N = 330 for PN and TC) of the Suffolk breed from the Estacion Experimental Rinconada de Maipu from the Universidad de Chile. Genetic-economic efficiency (ΔH) was estimated as a result of the use of indexes with and without constraints, and when selection is carried out to change a single trait. The traits included in the selection index (IS) were: birth weight (PN) and birth to weaning growth rate (TC). The predicted genetic gain in PN and TC is minimal, due to the moderate to low heritability used (0.15 and 0.17 for PN and TC, respectively). In the simulations, TC was the