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> maybe you have no power to estimate these kinds of models, or you have to centre age. For this trait, I have more than 100000 data on 1600 individuals with an exhaustive pedegree. It is huge. Clearly, the number of...

Hi, Thank David for the package reference. Sorry, I did not recall the context of my work but I am doing animal models on Poisson distributed traits. So I have to use MCMCglmm package -and consequently I am in a...

Dear all, I have a quite simple question but I do not find a clear answer on the internet nor in books. The context : I am currently working on different aspects of bird aging. I have done animal models with...

Hi Jarrod and all other, You said "your posterior is just reflecting your prior" : I was thinking about this issue but how can I test it? The V I used is V=(Phenotypic variance/2)= 0.47 so it is...

Dear all, I have been running animal models to estimate whether Va of a trait was changing with age, and the correlation between this trait expressed in different age classes. The problem is I have a difference in additive genetic...

Hi all, First, thank a lot Greg for the ideas you gave but I am not sure to understand really what mean a 'point mass' and to be honest I am really far from being a developer. I think that...

Dear all, I have tried the different solutions you proposed. I have tried to scale fixed parameters and the response variables between 0 and 1 but the problem remained However, using ASREML, it seems that the problem comes from the...

Dear all, I have a question concerning the interpretation of Va estimate using univariate versus the bivariate animal models. Indeed, I am interested to understand the age-related variation of the additive genetic variance. For this, I made an analysis...

Dear all, My question could appear trivial but I still have not found a clear answer. From what I gathered, the Bayesian framework gives us two possible tools to estimate significance of variances, the DIC and Confidence Interval (CI) estimates...

Dear all, My question could appear trivial but I still have do not still have found a clear answer. BasicallyFrom what I gathered, the Bayesian framework gives us two possible tools to estimate significance of variances, the DIC and Confidence...

Dear Jarrod and others, It is not a segfault error, the runs actually stop with one of these two errors. My covariates have already been rescaled (centered to be precise). I have tried to center-reduce the covariates (by usind...

Sorry once again, I have problems with my e-mail software which send draft without my approbation...It is very annoying First thank David for your response So, I have tried to used "pedigreemm" but I am unable to run...

Dear all, I am using MCMCglmm function to construct bivariate animal models of bustard sperm production according to age-classes. The problem is that the models can stochastically crash before the end of the run (at 2000 iterations or 120000...

Dear all, I am using MCMCglmm function to construct bivariate animal models of bustard sperm production according to age. Until six years old, each age are considered as a trait. After 6 years old, age-class "7-8" and "9...