Abstracts (first author)
Recombination landscape of Ficedula flycatchers
Characterizing variation in recombination rates between and within species is essential for understanding the patterns of gene flow, the efficacy of selection, and the variation in genetic divergence and diversity. The Natural pedigree of collared flycatchers (Ficedula albicollis) available from the Baltic island of Öland provides an exclusive opportunity to investigate variation in the rate of recombination in wild bird populations. Using a newly developed custom 50,000 SNP chip, we constructed a high-density genetic linkage map of the collared flycatcher. Our linkage analysis placed 4,951 SNPs in 33 linkage groups, corresponding to 29 autosomes and the Z chromosome. The total genetic distance was 3,096 cM with higher recombination rate in males than females (3,226 cM in males, 2,970 cM in females). Recombination rates substantially vary between chromosomes (mean recombination rate per chromosome = 2.04 ~ 6.97 cM/Mb) as well as within chromosomes and are generally higher toward the end of chromosomes. In addition to the collared flycatcher pedigree samples, we have genotyped multiple populations of collared flycatchers across Europe to characterize the pattern of linkage disequilibrium (LD) and estimate population-scaled recombination rate (rho). Population-specific recombination patterns and association with underlying molecular features will be discussed.