Open AccessAncestral polymorphisms shape the adaptive radiation ofMetrosiderosacross the Hawaiian Islands
Author(s) -
Jae Young Choi,
Xiaofeng Dai,
Ornob Alam,
Julie Peng,
Priyesh Rughani,
Scott E. Hickey,
Eoghan Harrington,
Sissel Juul,
Julien F. Ayroles,
Michael D. Purugganan,
Elizabeth A. Stacy
Publication year - 2021
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.2023801118
Subject(s) - biology , adaptive radiation , evolutionary biology , population genomics , genetic admixture , population , genomics , ecology , genome , phylogenetics , genetics , gene , demography , sociology
Significance Some of the most spectacular adaptive radiations of plants and animals occur on remote oceanic islands, yet such radiations are preceded by founding events that severely limit genetic variation. How genetically depauperate founder populations give rise to the spectacular phenotypic and ecological diversity characteristic of island adaptive radiations is not known. We generated genomic resources for HawaiianMetrosideros ––a hyper-variable adaptive radiation of woody taxa—for insights into the paradox of remote island radiations. We posit that divergent selection and differential sorting of an unexpectedly rich pool of ancestral variation drove the diversification of lineages. Recurring use of ancient variants from a richer-than-expected gene pool may explain how lineages can diversify to fill countless niches on remote islands.