indirect maternal genetic effects

Hello everyone,

I am trying to model direct genetic effects and indirect maternal 
genetic effects on infant survival, using MCMCglmm. From what I know and 
understood from the ASReml code on how to model this, I should include 
the identity of my focal individual ("animal") to estimate the direct 
genetic effect, include the identity of his mother ("dam") to estimate 
the maternal environment effect and then add another variable which 
should represent the genetic effect of the mother on the focal 
individual. I assumed that I should add the same "dam" variable but give 
it its own incidence matrix through ginverse(), but I am not sure about 
this. I would appreciate some help on how to code this relationship.

Thank you

Walid Mawass

M.Sc. of Cellular and Molecular Biology

Population Genetics Laboratory

University of Qu?bec at Trois-Rivi?res
3351, boul. des Forges, C.P. 500
Trois-Rivi?res (Qu?bec) G9A 5H7
Telephone: 819-376-5011 poste 3384