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Accommodating Variable Disease Challenge on Breeding Value Prediction for Sires - Using Footrot as an Example |
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Editor(s): Laercio Porto-Neto |
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Association for the Advancement of Animal Breeding and Genetics (AAABG) |
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Footrot is a highly contagious hoof disease of sheep, the expression of which depends on environmental conditions and the presence of infective strains of bacteria. Footrot scored from field exposure is, therefore, a potentially difficult trait to analyse across time and production environments. This study explores the use of pre-analysis transformation techniques to account for the disease incidence and pattern of scores obtained, using footrot as an example. A biological transformation, where the phenotypes were transformed to a similar incidence level based on a nonlinear transition of scores over time produced the highest rank correlation of the sire's breeding values across challenges compared to more traditional statistical transformation techniques. The results suggest that using a transformation based on biological information is likely to improve the estimation of breeding values for footrot. |
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Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.22, p. 581-584 |
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