I am the author of the following R packages:

ggroups: Pedigree and Genetic Groups

Link: https://cran.r-project.org/package=ggroups

Description: Calculates additive and dominance genetic relationship matrices and their inverses, in matrix and tabular-sparse formats. It includes functions for checking and processing pedigree, calculating inbreeding coefficients (Meuwissen & Luo, 1992 https://doi.org/10.1186%2F1297-9686-24-4-305), as well as functions to calculate the matrix of genetic group contributions (Q), and adding those contributions to the genetic merit of animals (Quaas (1988) https://doi.org/10.3168%2Fjds.S0022-0302%2888%2979691-5). Calculation of Q is computationally extensive. There are computationally optimized functions to calculate Q.

mbend: Matrix Bending

Link: https://cran.r-project.org/package=mbend

Description: Bending non-positive-definite (symmetric) matrices to positive-definite, using weighted and unweighted methods. Jorjani, H., et al. (2003) https://doi.org/10.3168%2Fjds.S0022-0302%2803%2973646-7. Schaeffer, L. R. (2014) http://animalbiosciences.uoguelph.ca/~lrs/ELARES/PDforce.pdf.

pedSimulate: Pedigree, Genetic Merit, Phenotype, and Genotype Simulation

Link: https://cran.r-project.org/package=pedSimulate

Description: Simulate pedigree, genetic merits and phenotypes with random/non-random matings followed by random/non-random selection with different intensities and patterns in males and females. Genotypes can be simulated for a given pedigree, or an appended pedigree to an existing pedigree with genotypes. Mrode, R. A. (2005) <ISBN:9780851989969, 0851989969>; Nilforooshan, M.A. (2022) https://doi.org/10.37496%2Frbz5120210131.

pedMermaid: Pedigree Mermaid Syntax

Link: https://cran.r-project.org/package=pedMermaid

Description: SGenerate Mermaid syntax for a pedigree flowchart from a pedigree data frame. Mermaid syntax is commonly used to generate plots, charts, diagrams, and flowcharts. It is a textual syntax for creating reproducible illustrations. This package generates Mermaid syntax from a pedigree data frame to visualize a pedigree flowchart. The Mermaid syntax can be embedded in a Markdown or R Markdown file, or viewed on Mermaid editors and renderers. Links’ shape, style, and orientation can be customized via function arguments, and nodes’ shapes and styles can be customized via optional columns in the pedigree data frame.

FnR: Inbreeding and Numerator Relationship Coefficients

Link: https://cran.r-project.org/package=FnR

Description: Compute inbreeding coefficients using the method of Meuwissen and Luo (1992) https://doi.org/10.1186%2F1297-9686-24-4-305, and numerator relationship coefficients between individuals using the method of Van Vleck (2007) https://pubmed.ncbi.nlm.nih.gov/18050089/.