Quantitative genetics
Variance components, relationship matrices, heritability, BLUPs, and advanced genetic models.
OPEN-SOURCE R SOFTWARE
Mixed models.
Built to scale.
sommer is an R package for advanced mixed models, quantitative genetics, genomic prediction, G×E analysis, and large-scale statistical computing.
Free and open source under GPL-3.
A flexible mixed-model framework
y = Xβ + Zu + e
GRKΣH⊗VAI-REML
From classical mixed models to genomic, multivariate, spatial, and heterogeneous covariance structures.
WHAT SOMMER DOES
One framework for complex models.
G×E analysis
Model genotype-by-environment interaction with flexible covariance structures and heterogeneous variances.
Multivariate models
Fit multiple traits and structured covariance relationships within a unified mixed-model framework.
Genomic prediction
Work with genomic relationship matrices and modern prediction workflows in R.
Sparse computation
Designed for computationally demanding mixed-model problems where matrix structure matters.
R-native workflow
Formula-based modeling, familiar R data structures, and an ecosystem built for reproducible research.
LEARN
Research software should be understandable.
Explore examples, tutorials, documentation, and the source code. The project is developed openly so researchers can inspect, reproduce, extend, and contribute to the methods.
PROFESSIONAL SERVICES
Need help with a difficult model?
sommer is free and open source. Professional consulting is available for organizations that need expert help implementing, optimizing, or extending advanced mixed-model and quantitative-genetic analyses.
Advanced mixed models
Model development for multivariate, G×E, spatial, heterogeneous, and structured covariance problems.
Performance optimization
Profile and accelerate large mixed-model workflows, sparse computations, and demanding genomic analyses.
Custom development
New covariance structures, algorithms, R/C++ functionality, and research software tailored to a scientific problem.
Genomic prediction
Design and implement quantitative-genetic and genomic prediction workflows for research and breeding programs.
Migration & integration
Help move established mixed-model workflows into reproducible R and sommer-based pipelines.
Training & workshops
Practical training in mixed models, quantitative genetics, genomic prediction, and advanced sommer workflows.
Have a model that is difficult to fit?
Start a conversation
Tell me about the data, model, computational bottleneck, or method you need to develop.
CITATION
Use sommer in your research?
Please cite the sommer publication associated with the version and methods you use. See the repository for current citation information and publications.
Citation information ↗OPEN SOURCE
Free software. Open development.
sommer is distributed under the GNU General Public License version 3 (GPL-3). The software remains free to use, including for commercial purposes, under the terms of that license.