Multiple paths toward repeated phenotypic evolution in the spiny-leg adaptive radiation (Tetragnatha; Hawai'i)

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  • José Cerca
  • Darko D. Cotoras
  • Santander, Cindy
  • Vanessa C. Bieker
  • Leke Hutchins
  • Jaime Morin-Lagos
  • Carlos F. Prada
  • Susan Kennedy
  • Henrik Krehenwinkel
  • Andrew J. Rominger
  • Joana Meier
  • Dimitar Dimitrov
  • Torsten H. Struck
  • Rosemary G. Gillespie
The repeated evolution of phenotypes provides clear evidence for the role of natural selection in driving evolutionary change. However, the evolutionary origin of repeated phenotypes can be difficult to disentangle as it can arise from a combination of factors such as gene flow, shared ancestral polymorphisms or mutation. Here, we investigate the presence of these evolutionary processes in the Hawaiian spiny-leg Tetragnatha adaptive radiation, which includes four microhabitat-specialists or ecomorphs, with different body pigmentation and size (Green, Large Brown, Maroon, and Small Brown). We investigated the evolutionary history of this radiation using 76 newly generated low-coverage, whole-genome resequenced samples, along with phylogenetic and population genomic tools. Considering the Green ecomorph as the ancestral state, our results suggest that the Green ecomorph likely re-evolved once, the Large Brown and Maroon ecomorphs evolved twice and the Small Brown evolved three times. We found that the evolution of the Maroon and Small Brown ecomorphs likely involved ancestral hybridization events, while the Green and Large Brown ecomorphs likely evolved through novel mutations, despite a high rate of incomplete lineage sorting in the dataset. Our findings demonstrate that the repeated evolution of ecomorphs in the Hawaiian spiny-leg Tetragnatha is influenced by multiple evolutionary processes.
OriginalsprogEngelsk
TidsskriftMolecular Ecology
Vol/bind32
Udgave nummer18
Sider (fra-til)4971-4985
Antal sider15
ISSN0962-1083
DOI
StatusUdgivet - 2023

Bibliografisk note

Funding Information:
JC, RGG and THS were supported by a Peder Sather grant. DDC was supported by a Fulbright/CONICYT Doctoral Fellowship, Integrative Biology Department and the Graduate Division of UC Berkeley, the Margaret C. Walker Fund (Essig Museum of Entomology), Sigma Xi and an Alexander von Humboldt Postdoctoral Fellowship. Fieldwork was funded by NSF grants DEB 1241253 and DEB 1927510 to R.G. The inclusion of the valuable feedback provided by the three anonymous reviewers and subject editor Christian Schlötterer significantly improved this manuscript and the authors are deeply grateful to them. The authors would like to acknowledge a large number of people and institutions that collaborated at different stages of this research. The fieldwork in Hawaiʻi was supported by Laura Arnold, Timothy Bailey, David Benítez, Katie Champlin, James Friday, Jun Ying Lim, Emory Griffin‐Noyes, Faith Inman‐Narahari, Darcey Iwashita, Raina Kaholoaa, Jessie Knowlton, Rick Lapoint, Scott Laursen, Karl Magnacca, Elizabeth Morrill, Patrick O’Grady, Rita Pregana, Donald Price, David Rankin, William Roderick, Karen Uy, Erin Wilson‐Rankin and the Kīpuka team. J.C. is grateful to Mike Martin for access to a supercomputer cluster, Mark Ravinet for his constant mentorship and LD scripts, and Michael Matschiner for comments on the manuscript. The permit processing and access to different reserves and private land was possible thanks to Steve Bergfeld (DOFAW Big Island), Pat Bily (TNC Maui), Tabetha Block (HETF), Shalan Crysdale (TNC Big Island), Lance DaSilva (DOFAW Maui), Danae Dean (Kahoma Ranch), Charmian Dang (NAR), Melissa Dean (HETF), Betsy Gagne (NAR), Elizabeth Gordon (HALE), Lisa Hadway (DOFAW Big Island), Paula Hartzell (Lanaʻi Resorts, LLC), Greg Hendrickson (Kealakekua Ranch), Mel Johansen (TNC Big Island), Pomaikaʻi Kaniaupio‐Crozier (Maui Land and Pinneapple), Cynthia King (DLNR), Peter Landon (NAR Maui), Rhonda Loh (HAVO), Russell Kallstrom (TNC Molokaʻi), Joey Mello (DOFAW Big Island), Ed Misaki (TNC Molokaʻi), Elliot Parsons (Puʻu Waʻawaʻa HETF), Lani Petrie (Kapapala Ranch), Shawn Saito (Parker Ranch), Joe Ward (Maui Land and Pinneapple) and Kawika Winter (Limahuli Botanical Garden).

Publisher Copyright:
© 2023 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.

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