Genetic-Relationship-Matrix Structural Equation Modelling (GRMSEM)
grm import function
grm import function
grmsem bivariate heritability estimation function.
grmsem factorial co-heritability and co-environmentality estimation fu...
grmsem model fitting function
grmsem standardised parameters function
grmsem variance estimation function
Quantitative genetics tool supporting the modelling of multivariate genetic variance structures in quantitative data. It allows fitting different models through multivariate genetic-relationship-matrix (GRM) structural equation modelling (SEM) in unrelated individuals, using a maximum likelihood approach. Specifically, it combines genome-wide genotyping information, as captured by GRMs, with twin-research-based SEM techniques, St Pourcain et al. (2017) <doi:10.1016/j.biopsych.2017.09.020>, Shapland et al. (2020) <doi:10.1101/2020.08.14.251199>.
Useful links