McDermott_AOS_Poster_final.pdf

This poster outlines my proposed dissertation research on how migration and environmental stressors affect plumage traits used to attract mates. Variation in these traits can affect reproductive success and can contribute to divergence among populations

2013 ABS Presentation

<p>Presentation for 2013 Animal Behavior Society Meeting in Boulder, Co</p

2014 AOU talk

<p>A central theme of evolutionary research is to understand the source and function of phenotypic variation. For most phenotypic traits, sources of variation can be partitioned into genetic or environmental variation. Identifying the proportion of variance due to these components allows for predictions regarding phenotypic responses to variable environments and selection to be made. Barn swallow subspecies have divergent phenotypes and it appears that the focal trait for female preferences has also diverged. We examined the sources of phenotypic variation of melanin-based ventral plumage in two populations of barn swallows: North America (Colorado) and Europe (Czech Republic). In North America, male coloration is the target of sexual selection with darker males achieving higher reproductive success. However, it is unclear what role coloration plays in mate choice decision for our study population in the Czech Republic. In both populations, we found that coloration is explained by both genetic and environmental variation. However, comparative analyses suggest that there is no divergence among these populations in the additive genetic covariance structure for color traits. These results provide insight into the possible mechanisms that lead to phenotypic divergence between these recently diverged subspecies.</p

scordato_BARS_metadata

Metadata for genotype estimates. File contains 533 rows corresponding to the genotype file, with individual IDs, sampling locations, GPS coordinates, and taxon classifications with corresponding color codes for plotting

SNP dataset

Data for 19,437 SNP loci and 276 individuals in allelic format used for ancestry analyses. Individuals IDs are voucher numbers (see Sampling, genomic and morphological data used for analyses.xlsx for details

scordato_BARS_genotype_estimates

Individual genotype estimates for each individual barn swallow (n=533) at each locus (n=23,251). Genotypes are continuous values derived from Bayesian estimates of genotype. They can be rounded to 0, 1, or 2 to replicated analyses that require genotype calls (see supporting information for paper

Hirundo rustica genotype probabilities

Genotype probabilities associated with the data analyzed in this study

parse_barcodes768

scripts for parsing barcode

pairwise differences - genotype and phenotype

These are the pairwise differences in genome-wide genomic divergence and phenotype between 8 populations of barn swallows

DDRAD seq protocol

Here we provide the step by step protocol for library prep