{"doi":"10.1111/jeb.13681","title":"Secondary contact and genomic admixture between rhesus and long‐tailed macaques in the Indochina Peninsula","abstract":"Understanding the process and consequences of hybridization is one of the major challenges in evolutionary biology. A growing body of literature has reported evidence of ancient hybridization events or natural hybrid zones in primates, including humans; however, we still have relatively limited knowledge about the pattern and history of admixture because there have been little studies that simultaneously achieved genome-scale analysis and a geographically wide sampling of wild populations. Our study applied double-digest restriction site-associated DNA sequencing to samples from the six localities in and around the provisional hybrid zone of rhesus and long-tailed macaques and evaluated population structure, phylogenetic relationships, demographic history, and geographic clines of morphology and allele frequencies. A latitudinal gradient of genetic components was observed, highlighting the transition from rhesus (north) to long-tailed macaque distribution (south) as well as the presence of one northern population of long-tailed macaques exhibiting unique genetic structure. Interspecific gene flow was estimated to have recently occurred after an isolation period, and the migration rate from rhesus to long-tailed macaques was slightly greater than in the opposite direction. Although some rhesus macaque-biased alleles have widely introgressed into long-tailed macaque populations, the inflection points of allele frequencies have been observed as concentrated around the traditionally recognized interspecific boundary where morphology discontinuously changed; this pattern was more pronounced in the X chromosome than in autosomes. Thus, due to geographic separation before secondary contact, reproductive isolation could have evolved, contributing to the maintenance of an interspecific boundary and species-specific morphological characteristics.","journal":"Journal of Evolutionary Biology","year":2020,"id":77456,"datarank":0.668161174607463,"base_score":2.995732273553991,"endowment":2.995732273553991,"self_citation_contribution":0.4493598410330987,"citation_network_contribution":0.21880133357436438,"self_endowment_contribution":0.4493598410330987,"citer_contribution":0.21880133357436438,"corpus_percentile":null,"corpus_rank":null,"citation_count":19,"citer_count":11,"citers_with_citation_signal":9,"citers_with_endowment":9,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9492,"is_data_producer":true,"deposit_databanks":{"Dryad":["10.5061/dryad.1ns1rn8rf"]},"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":403819,"name":"Sreetharan Kanthaswamy","orcid":"0009-0000-0313-5566","position":1,"is_corresponding":false},{"id":403820,"name":"Srichan Bunlungsup","orcid":"0000-0001-5174-0648","position":2,"is_corresponding":false},{"id":405515,"name":"Robert F. Oldt","orcid":null,"position":3,"is_corresponding":false},{"id":405516,"name":"Paul Houghton","orcid":null,"position":4,"is_corresponding":false},{"id":405517,"name":"Yuzuru Hamada","orcid":null,"position":5,"is_corresponding":false},{"id":403821,"name":"Suchinda Malaivijitnond","orcid":"0000-0003-0897-2632","position":6,"is_corresponding":false},{"id":403818,"name":"Tsuyoshi Ito","orcid":"0000-0001-6193-2408","position":0,"is_corresponding":true}],"reference_count":101,"raw_metadata":null,"created_at":"2026-07-18T21:49:16.197289Z","pmid":"33448526","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}