Genetic Study of Plant Mixtures R package plantmix version 1.0.3 Fit linear mixed models dedicated to the genetic study of plant mixtures, such as those based on general and specific mixing abilities (GMA-SMA) as well as direct and social breeding values (DBV-SBV), also known as direct and indirect genetic effects (DGE-IGE). More details in Forst et al (2019, <doi:10.1016/j.fcr.2019.107571>) for GMA-SMA models, and Salomon et al (2026, <doi:10.64898/2026.03.27.714849>) for DBV-SBV models. The package also provides functions to optimize experimental designs, simulate data sets and compute interaction indices. Software Depends: R (>= 4.0.0), ggplot2, lme4 Imports: graphics, igraph, MASS, Matrix, methods, Rcpp (>= 1.0.13), stats, TMB (>= 1.9.21), utils LinkingTo: TMB, Rcpp, RcppEigen Suggests: breedR, INLA, emmeans, knitr, MM4LMM, rmarkdown, testthat Timothee Flutre <timothee.flutre@inrae.fr> Comprehensive R Archive Network (CRAN) Timothee Flutre [aut, ctb, cre] (ORCID: <https://orcid.org/0000-0003-4489-4782>), INRAE [cph, fnd], Jerome Enjalbert [ctb] (ORCID: <https://orcid.org/0000-0003-0408-2253>), Emma Forst [ctb] (ORCID: <https://orcid.org/0000-0001-9557-3589>), Maxence Remerand [ctb] (ORCID: <https://orcid.org/0009-0007-3217-5613>), Jemay Salomon [ctb] (ORCID: <https://orcid.org/0000-0003-4454-7916>) AGPL-3 2026-06-20 application/tgz https://CRAN.R-project.org/package=plantmix doi:10.32614/CRAN.package.plantmix