Data from: Similar hybrid composition among different age and sex classes in the Myrtle–Audubon's warbler hybrid zone

We sampled birds during the breeding season and during fall migration and compared the frequencies of hybrids of different sex and age classes. Specifically, we tested for evidence of early-generation hybrids being significantly under- or over-represented in any of these classes, as would be expected if hybrids have lower or higher fitness than non-hybrids. We found that the genomic composition of birds in the hybrid zone spans the full ancestry spectrum.

Across all our sampling periods, we found an excess of birds that had more Audubon's ancestry, with a stronger bias toward Audubon's ancestry in fall migrants than in breeding birds, consistent with asymmetric introgression. Notably, we did not find any differences in hybrid frequencies between juvenile and adult age classes or between males and females. Therefore, our results do not support large differences in viability between male and female hybrids or between different age classes of hybrids.

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Plate_1_2-index_1_ATCACG_R1.fastq Plate_1_2-index_2_CGATGT_R1.fastq Plate_1_2-index_3_TTAGGC_R1.fastq Plate_1_2-index_4_TGACCA_R1.fastq Plate_1_2-index_5_ACAGTG_R1.fastq Plate_1_2-index_6_GCCAAT_R1.fastq Plate_1_2-index_7_CAGATC_R1.fastq Plate_1_2-index_8_ACTTGA_R1.fastq Plate_1_2-index_9_GATCAG_R1.fastq Plate_1_2-index_10_TAGCTT_R1.fastq Plate_3_4-index_1_ATCACG_R1.fastq Plate_3_4-index_2_CGATGT_R1.fastq Plate_3_4-index_3_TTAGGC_R1.fastq Plate_3_4-index_4_TGACCA_R1.fastq Plate_3_4-index_5_ACAGTG_R1.fastq Plate_3_4-index_6_GCCAAT_R1.fastq Plate_3_4-index_7_CAGATC_R1.fastq Plate_3_4-index_8_ACTTGA_R1.fastq Plate_3_4-index_9_GATCAG_R1.fastq Plate_3_4-index_10_TAGCTT_R1.fastq Sample-barcode Plate Info Sample information and associated barcodes/indexes for demultiplexing RAW ddRAD data.

Illumina data generated from single end chemistry on the HighSeq2500 platform. Additional sample information can be found in the Appendix of the journal publisher's website. sample_barcode_plate_info.xlsx