Genetic parameters for FAMACHA score and related traits for host resistance/resilience and production at differing severities of worm challenge in a Merino flock in South Africa.

Abstract excerpt

The objectives of this study were to estimate genetic parameters for FAMACHA score and related traits at different levels of worm challenge in sheep and to assess the effect of different methods for modelling records from treated lambs on estimates of genetic parameters. Data were collected over five consecutive Haemonchus seasons from a total of l671 Merino lambs using the FAMACHA clinical evaluation system, and...

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