Figure 5 - uploaded by Francisco Peñagaricano
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Genetic trend for the susceptibility to Johne's disease (JD) as diagnozed with the Idexx test in US Holstein cows. The JD susceptibilities were estimated using single-step threshold (ssTHR) and single-step linear (ssLR) models, respectively.
Source publication
Johne's disease (JD) is an infectious enteric disease in ruminants, causing substantial economic loss annually worldwide. This work aimed to estimate JD's genetic parameters and the phenotypic and genetic trends by incorporating recent data. It also explores the feasibility of a national genetic evaluation for JD susceptibility in Holstein cattle i...
Contexts in source publication
Context 1
... trends of JD were estimated jointly for the 2 JD test results obtained from linear (ssLR) and threshold (ssTHR) single-step models, respectively ( Table 5), assuming that the differences in observed JD incidences between the 2 JD tests were non-genetic. The genetic trends were relatively flat from 1994 to 2009 for PCK tests ( Figure 6) and from 2002 to 2009 for IDX tests ( Figure 5) and began to drop afterward ( Figure 5). The extent of the decrease in genetic trend for IDX tests after 2009 was more significant with the single-step threshold model (ssTHR) than with the single-step linear model (ssLR). ...
Context 2
... trends of JD were estimated jointly for the 2 JD test results obtained from linear (ssLR) and threshold (ssTHR) single-step models, respectively ( Table 5), assuming that the differences in observed JD incidences between the 2 JD tests were non-genetic. The genetic trends were relatively flat from 1994 to 2009 for PCK tests ( Figure 6) and from 2002 to 2009 for IDX tests ( Figure 5) and began to drop afterward ( Figure 5). The extent of the decrease in genetic trend for IDX tests after 2009 was more significant with the single-step threshold model (ssTHR) than with the single-step linear model (ssLR). ...
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