DOI: 10.5061/dryad.2cs4v
title: Data from: Resolving the Northern Hemisphere source region for the long-distance dispersal event that gave rise to the South American endemic dung moss Tetraplodon fuegianus

description: Premise of the study—American bipolar plant distributions characterize
 taxa at various taxonomic ranks but are most common in the bryophytes at
 infraspecific and infrageneric levels. A previous study on the bipolar
 disjunction in the dung moss genus Tetraplodon found that direct
 long-distance dispersal from North to South in the Miocene - Pleistocene
 accounted for the origin of the Southern American endemic Tetraplodon
 fuegianus, congruent with other molecular studies on bipolar bryophytes.
 The previous study, however, remained inconclusive regarding a specific
 Northern Hemisphere source region for the trans-equatorial dispersal event
 that gave rise to T. fuegianus. Methods—To estimate spatial genetic
 structure and phylogeographic relationships within the bipolar lineage of
 Tetraplodon, which includes T. fuegianus, we analyzed thousands of
 Restriction-site Associated DNA (RADseq) loci and single nucleotide
 polymorphisms using Bayesian individual assignment and maximum likelihood
 and coalescent model based phylogenetic approaches. Key
 results—Northwestern North America is the most likely source of the recent
 ancestor to T. fuegianus. Conclusions—Tetraplodon fuegianus, which marks
 the southernmost populations in the bipolar lineage of Tetraplodon, arose
 following a single long-distance dispersal event involving a T. mnioides
 lineage that is now rare in the Northern Hemisphere and potentially
 restricted to the Pacific Northwest region of North America. Furthermore,
 gene flow between sympatric lineages of Tetraplodon mnioides in the
 Northern Hemisphere is limited, possibly due to high rates of selfing or
 reproductive isolation.
description: Aligned supermatrices
 & SNP matricesAdd data sets referred
 to in Table 1 and Table 2 are included. Supermatrices are in nexus format
 and unlinked SNP files are in .str format, and include sample assignment
 information based on RAxML analyses (see Figure 1). Sample assignment
 information should not be used to inform STRUCTURE analyses however, but
 to help with graphical display and order of samples. All data files were
 produced in PyRAD v. 2.17. (Eaton 2014) Details of data file generation
 can be found in the main text and SI of the associated
 paper.Aligned-Supermatrices_&_SNPmatrices.zipdemultiplexed & trimmed reads for all samples (n=81)Compressed package with demultiplexed and trimmed RADseq data for 81 samples (i.e. 81 .fastq.gz files representing all samples listed in Appendix S1). Demultiplexing and trimming was done in PyRAD v. 2.17 (Eaton 2014). Reads were de-multiplexed allowing for a maximum of two mismatches in each eight bp barcode, and restriction enzyme cut sites and adapter sequences were removed. .fastq.gz files are named as such: Sample ID-Collection#.fastq.gz. For example, Nepal_1_1101.fastq.gz is for the sample identified as "Nepal_1" in the associated publication, which was also assigned collection number 1101. The sample ID provides information on the general collection locality.Demultiplexed_and_Trimmed_AllSamples.zip