Data from: Z chromosome divergence, polymorphism, and relative effective population size in a genus of lekking birds
Oyler-McCance, Sara J., United States Geological Survey
Cornman, Robert S., United States Geological Survey
Jones, Kenneth L., Department of Biochemistry and Molecular Genetics, University of Colorado, School of Medicine, Aurora, USA
Fike, Jennifer A., United States Geological Survey
Published Apr 16, 2015 on Dryad.
Cite this dataset
Oyler-McCance, Sara J.; Cornman, Robert S.; Jones, Kenneth L.; Fike, Jennifer A. (2015). Data from: Z chromosome divergence, polymorphism, and relative effective population size in a genus of lekking birds [Dataset]. Dryad. https://doi.org/10.5061/dryad.75n5q
Sex chromosomes contribute disproportionately to species boundaries as they diverge faster than autosomes and often have reduced diversity. Their hemizygous nature contributes to faster divergence and reduced diversity, as do some types of selection. In birds, other factors (mating system and bottlenecks) can further decrease the effective population size of Z-linked loci and accelerate divergence (Fast-Z). We assessed Z-linked divergence and effective population sizes for two polygynous sage-grouse species and compared them to estimates from birds with various mating systems. We found lower diversity and higher FST for Z-linked loci than for autosomes, as expected. The πZ/πA ratio was 0.38 in Centrocercus minimus, 0.48 in Centrocercus urophasianus and 0.59 in a diverged, parapatric population of C. urophasianus, a broad range given the mating system among these groups is presumably equivalent. The full data set had unequal males and females across groups, so we compared an equally balanced reduced set of C. minimus and individuals pooled from both C. urophasianus subgroups recovering similar estimates: 0.54 for C. urophasianus and 0.38 for C. minimus. We provide further evidence that NeZ/NeA in birds is often lower than expected under random mating or monogamy. The lower ratio in C. minimus could be a consequence of stronger selection or drift acting on Z loci during speciation, as this species differs strongly from C. urophasianus in sexually selected characters with minimal mitochondrial divergence. As C. minimus also exhibited lower genomic diversity, it is possible that a more severe demographic history may contribute to its lower ratio.
This file is a text file in Arelquin input format. It could easily be manipulated into other formats. The 2 groups represent autosome data for 2 species C. urophasianus and C. minimus.
This file is a text file in Arelquin input format. It contains autosome SNP genotypes for three groups. Two groups of C. urophasianus (one is GRSG which represents the southern part of the range and the other is BiState which represents the diverged population on the border between California and Nevada). The third group is the Gunnison Sage-grouse data.
This is a text file that is in Arlequin input format. It contains Z chromosome data for C. urophasianus and C. minimus.
This is a text file in Arlequin input format and represents Z chromosome data for three groups (2 C. urophasianus - one (GRSG) is the southern part of the range and the other (BiState) is the diverged population on the border between California and Nevada). The third group is Gunnison Sage-grouse.
mean FST by chromosome
This file is a text file that shows the mean FST values between C. urophasianus and C. minimus for each chromosome (1 - 10) as well as the Z chromosome.