DOI: 10.5061/dryad.0jp4740
title: Data from: Genomic scans reveal multiple mito‐nuclear incompatibilities in population crosses of the copepod Tigriopus californicus

description: The evolution of intrinsic postzygotic isolation can be explained by the
 accumulation of Dobzhansky-Muller incompatibilities (DMI). Asymmetries in
 the levels of hybrid inviability and hybrid sterility are commonly
 observed between reciprocal crosses, a pattern that can result from the
 involvement of uniparentally inherited factors. The mitochondrial genome
 is one such factor that appears to participate in DMI in some crosses but
 the frequency of its involvement versus biparentally inherited factors is
 unclear. Here we assess the relative importance of incompatibilities
 between nuclear factors (nuclear-nuclear) versus those between
 mitochondrial and nuclear factors (mito-nuclear) in a species that lacks
 sex chromosomes. We used a Pool-seq approach to survey three crosses among
 genetically divergent populations of the copepod, Tigriopus californicus,
 for regions of the genome that are affected by hybrid inviability. Results
 from reciprocal crosses suggest that mito-nuclear incompatibilities are
 more common than nuclear-nuclear incompatibilities overall. These results
 suggest that in the presence of very high levels of nucleotide divergence
 between mtDNA haplotypes, mito-nuclear incompatibilities can be important
 for the evolution of intrinsic postzygotic isolation. This is particularly
 interesting considering this species lacks sex chromosomes, which have
 been shown to harbor a particularly high number of nuclear-nuclear DMI in
 several other species.
description: Allele frequency for the
 SD x AB crossAllele frequencies
 across the 12 chromosomes of F2 hybrids from crosses between the San Diego
 (SD) and Abalone Cover (AB) populations of Tigriopus californicus. DA
 refers to the SDf x ABm cross, and AD is the ABf x SDm
 cross.DA_AD_AF.txtAllele frequency for the SD x AB crossAllele frequencies, following a sliding window averaging of 3000 consecutive SNPs, across the 12 chromosomes of F2 hybrids from crosses between the San Diego (SD) and Abalone Cover (AB) populations of Tigriopus californicus. DA refers to the SDf x ABm cross, and AD is the ABf x SDm cross.DA_AD_slwin3000_ed.txtAllele frequency for the CAT x AB crossAllele frequencies across the 12 chromosomes of F2 hybrids from crosses between the Catalina Island (CAT) and Abalone Cover (AB) populations of Tigriopus californicus. CA refers to the CATf x ABm cross, and AC is the ABf x CATm cross.CA_AC_AF.txtAllele frequency for the CAT x AB crossAllele frequencies, following a sliding window averaging of 3000 consecutive SNPs, across the 12 chromosomes of F2 hybrids from crosses between the Catalina Island (CAT) and Abalone Cover (AB) populations of Tigriopus californicus. CA refers to the CATf x ABm cross, and AC is the ABf x CATm cross.CA_AC_slwin3000_ed.txtAllele frequency for the SC x AB crossAllele frequencies across the 12 chromosomes of F2 hybrids from crosses between the Santa Cruz (SC) and Abalone Cover (AB) populations of Tigriopus californicus. SA refers to the SCf x ABm cross, and AS is the ABf x SCm cross.SA_AS_AF.txtAllele frequency for the SC x AB crossAllele frequencies, following a sliding window averaging of 3000 consecutive SNPs, across the 12 chromosomes of F2 hybrids from crosses between the Santa Cruz (SC) and Abalone Cover (AB) populations of Tigriopus californicus. SA refers to the SCf x ABm cross, and AS is the ABf x SCm cross.SA_AS_slwin3000_ed.txt