DOI: 10.5061/dryad.8j486
title: Data from: Evaluating the ability of Bayesian clustering methods to detect hybridization and introgression using an empirical red wolf dataset

description: Bayesian clustering methods have emerged as a popular tool for assessing
 hybridization using genetic markers. Simulation studies have shown these
 methods perform well under certain conditions; however, these methods have
 not been evaluated using empirical datasets with individuals of known
 ancestry. We evaluated the performance of two Bayesian clustering
 programs, BAPS and STRUCTURE, with genetic data from a reintroduced red
 wolf (Canis rufus) population in North Carolina, USA. Red wolves hybridize
 with coyotes (C. latrans), and a single hybridization event resulted in
 introgression of coyote genes into the red wolf population. A detailed
 pedigree has been reconstructed for the wild red wolf population that
 includes individuals of 50–100% red wolf ancestry, providing an ideal case
 study for evaluating the ability of these methods to estimate admixture.
 Using 17 microsatellite loci, we tested the programs using different
 training set compositions and varying numbers of loci. STRUCTURE was more
 likely than BAPS to detect an admixed genotype and correctly estimate an
 individual’s true ancestry composition. However, STRUCTURE was more likely
 to misclassify a pure individual as a hybrid. Both programs were
 outperformed by a maximum-likelihood-based test designed specifically for
 this system, which never misclassified a hybrid (50-75% red wolf) as a red
 wolf or vice versa. Both training set composition and the number of loci
 had an impact on accuracy but their relative importance varied depending
 on the program. Our findings demonstrate the importance of evaluating
 methods used for evaluating hybridization in the context of endangered
 species management.
description: BAPS_input_filesThese files are GenePop files that were used for the BAPS analyses. Each file reflects whether it contains 'Known' or 'Unknown' individuals incorporated in the BAPS analysis, along with the year and training set. Those with just a year in the file name are for the 'Update' training set, whereas those ending with '12years' were part of the '12 years' training set.Canid_genotypes_DryadThis file contains microsatellite genotypes of all individuals used in the simulation study. The first column contains the identification number for each individual. Column two indicates which group the individual was assigned to as part of our study (note: this matches the 'Founders' training set in our publication). The third column indicates whether the individual was included as a 'known' individual in the STRUCTURE analysis. A '1' indicates that an individual's genotype was included in estimating the allele frequencies, a '0' means is was not. All the remaining columns contain genotypic information, with each column containing genotyped alleles. There are two columns per microsatellite locus.STRUCTURE_input_filesThis contains all the input files used for the STRUCTURE analyses. Each file represents a separate year and training set. See our publication for more details. The ReadMe file contains the details of the parameter settings and input files.