Supporting data for: A Natural Hybrid Zone Between Divergent Ecotypes of a Wood-Decay Fungus in Fennoscandiadoi:10.18710/SQ8XSODataverseNO2026-06-221Ekeberg, Ingvild Myhre, 2026, "Supporting data for: A Natural Hybrid Zone Between Divergent Ecotypes of a Wood-Decay Fungus in Fennoscandia", https://doi.org/10.18710/SQ8XSO, DataverseNO, V1Supporting data for: A Natural Hybrid Zone Between Divergent Ecotypes of a Wood-Decay Fungus in Fennoscandiadoi:10.18710/SQ8XSOEkeberg, Ingvild MyhreSkrede, IngerKauserud, HåvardNaas, Adam EindrideKrabberød, Anders KristianPeris, DavidBysting, Anne KragDavid, MarieHofton, Tom HellikUniversity of OsloBWASAMtoolsBCFtoolsVCFtoolsDataverseNOUniversity of OsloEkberg, Ingvild MyhreEkeberg, Ingvild Myhre2025-11-21Medicine, Health and Life Scienceshybrid zonesecondary contactadaptationdemographypopulation genomicswood-decay fungiPostglacial migration out of glacial refugia has led to secondary contact between diverging lineages, creating numerous contact zones across European taxa. In fungi, especially in wood-decay fungi, such contact zones have been poorly studied. Yet, contact zones are natural “evolutionary experiments” where speciation, reproductive barriers and hybrid zone dynamics can be studied. We investigated the population structure, hybrid zone dynamics and demographic history of the wood-decay fungus Meruliopsis taxicola in Fennoscandia, using whole-genome resequencing data combined with distribution modelling. Our results show that there exist two ecologically and genomically divergent ecotypes of M. taxicola in Fennoscandia, corresponding to a Coastal and Continental ecotype, which probably diverged during the last glaciation and subsequently migrated into Fennoscandia. Moreover, the ecotypes are mating, and there is a narrow hybrid zone between the distributions of the ecotypes. The nature of the hybrid zone remains unclear, but there is evidence suggesting that there is asymmetrical gene flow from the Continental ecotype to the Coastal ecotype. Future work should test hypotheses regarding hybrid fitness through phenotypic experiments to conclude further about the pattern of asymmetrical introgression, and the stability of the hybrid zone.2020-10-012025-12-012020-10-012025-12-01NorwaySwedenFinlandRussian FederationCaucasusCountryWhole genome sequencing dataVCF<a href="http://creativecommons.org/publicdomain/zero/1.0">CC0 1.0</a>Submitted for reviewSubmitted for review00_README_file_template_general_v_2_4.txtRead me filetext/plainm.taxicola_maf0.011_biallelic_indremoved_with.outgroup_nomiss_no14no15_bcftoolsld0.8_25kb.vcf.gzVCF file with outgroup filtered on maf and no missingness, and LD pruned.application/x-gzipm.taxicola_maf0.011_biallelic_noindels_no14no15_nooutgroup.vcf.gzVCF file without the outgroup and filtered on Maf.application/x-gzipm.taxicola_maf0.011_biallelic_noindels_onlyvariants_no14no15_nomiss_bcftools0.8_25kb.vcf.gzVCF file without the outgroup, filtered on Maf and no missingness, and LD pruned.application/x-gzipm.taxicola_maf0.011_biallelic_noindels_onlyvariants_no14no15_nomiss.vcf.gzVCF file without the outgroup, filtered on Maf and no missingness.application/x-gzip