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Estimates of genetic parameters using random regression models for gastrointestinal helminthoid data in Angus cattle



Estimates of genetic parameters using random regression models for gastrointestinal helminthoid data in Angus cattle



Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006: 15-34



Genetic evaluation of livestock is based on appropriate modelling of phenotypic measurements. In ruminants, faecal egg count (FEC) is commonly used to measure resistance to nematodes. A series of repeated FEC measurements may provide information about the population dynamics. A total of 6,378 FEC measures were determined for 409 animals between 1992 and 2003 from BARC Wye Angus herd. Original data were transformed using Box-Cox transformation to approach normality.

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