A Predictive Haplotyping Package R package HaploCatcher version 2.0.1 Used for predicting a genotype's allelic state at a specific locus/QTL/gene. This is accomplished by using both a genotype matrix and a separate file which has categorizations about loci/QTL/genes of interest for the individuals in the genotypic matrix. A training population can be created from a panel of individuals who have been previously screened for specific loci/QTL/genes, and this previous screening could be summarized into a category. Using the categorization of individuals which have been genotyped using a genome wide marker platform, a model can be trained to predict what category (haplotype) an individual belongs in based on their genetic sequence in the region associated with the locus/QTL/gene. These trained models can then be used to predict the haplotype of a locus/QTL/gene for individuals which have been genotyped with a genome wide platform yet not genotyped for the specific locus/QTL/gene. This package is based off work done by Winn et al 2021. For more specific information on this method, refer to <doi:10.1007/s00122-022-04178-w>. Software Depends: R (>= 2.10) Imports: parallel, doParallel, foreach, caret, ggplot2, graphics, knitr, patchwork, randomForest, stats Suggests: rmarkdown, testthat (>= 3.0.0) Zachary Winn <zwinn@outlook.com> Comprehensive R Archive Network (CRAN) Zachary Winn [aut, cre] (ORCID: <https://orcid.org/0000-0003-1543-1527>) MIT + file LICENSE (https://CRAN.R-project.org/package=HaploCatcher/LICENSE) 2026-06-09 application/tgz https://CRAN.R-project.org/package=HaploCatcher doi:10.32614/CRAN.package.HaploCatcher