TY - JOUR
T1 - Sequential hybridization may have facilitated ecological transitions in the Southwestern pinyon pine syngameon
AU - Buck, Ryan
AU - Ortega-Del Vecchyo, Diego
AU - Gehring, Catherine
AU - Michelson, Rhett
AU - Flores-Rentería, Dulce
AU - Klein, Barbara
AU - Whipple, Amy V.
AU - Flores-Rentería, Lluvia
N1 - Funding Information:
The authors thank the Forest Service, the Navajo Nation, Joshua Tree National Park, Mojave National Preserve, San Pedro Martir National Park, Drs Sula Vanderplank, Jose Delgadillo, Nuri Benet-Pierce, Jamie Lamit, Hillary Cooper, Lela Andrews, Adair Patterson, Arizona State Forestry Crew, Kim Haase, Todd Wojtowicz, Lisa Prato, Collin Hafey, Craig Allen, David Charlet, Amy Van Gundy, Miranda Redmond, Tegan May, Jean-Guillaume Lonjaret, Alexandra McElwee-Adame, Amy Orduño-Baez, Kyle Gunther, Mario Galvan, Stephanie Stragier, and Brian Myers for facilitating plant collections; Katya Geissler, Alice Hossfeld, and Sandra Hyssat for their help in leaf morphology; and The Binational Species Group and the Flores-Renteria laboratory for feedback on the manuscript. The authors also thank UNAM LAVIS and UCR HPCC for providing access to their computer clusters. This work was supported by the Hispanic-Serving Institutions Education Grants (HSI) Program (grant no. 2018-38422-28614/project accession no. 1016839) from the USDA National Institute of Food and Agriculture, by the National Science Foundation (grant no. DEB-0816675), by PAPIIT-UNAM IA200620, by UC MEXUS-CONACYT fellowship CN-19-29, and by the University Grants Program of San Diego State University. Permits: USDA Permits for San Bernardino National Forest #2019-RB-SDSU and Cleveland National Forest #003571; California State Park Permit for Anza-Borrego #CDD-2018-008-ABDSP; USNPS Permits for Mojave #MOJA-2018-SCI-0036 and Joshua Tree #JOTR-2018-SCI-0026; and Mexico Permits #SPGA/DGVS/009790/18 and #SGPA/DGGFS/712/1631/18.
Funding Information:
The authors thank the Forest Service, the Navajo Nation, Joshua Tree National Park, Mojave National Preserve, San Pedro Martir National Park, Drs Sula Vanderplank, Jose Delgadillo, Nuri Benet‐Pierce, Jamie Lamit, Hillary Cooper, Lela Andrews, Adair Patterson, Arizona State Forestry Crew, Kim Haase, Todd Wojtowicz, Lisa Prato, Collin Hafey, Craig Allen, David Charlet, Amy Van Gundy, Miranda Redmond, Tegan May, Jean‐Guillaume Lonjaret, Alexandra McElwee‐Adame, Amy Orduño‐Baez, Kyle Gunther, Mario Galvan, Stephanie Stragier, and Brian Myers for facilitating plant collections; Katya Geissler, Alice Hossfeld, and Sandra Hyssat for their help in leaf morphology; and The Binational Species Group and the Flores‐Renteria laboratory for feedback on the manuscript. The authors also thank UNAM LAVIS and UCR HPCC for providing access to their computer clusters. This work was supported by the Hispanic‐Serving Institutions Education Grants (HSI) Program (grant no. 2018‐38422‐28614/project accession no. 1016839) from the USDA National Institute of Food and Agriculture, by the National Science Foundation (grant no. DEB‐0816675), by PAPIIT‐UNAM IA200620, by UC MEXUS‐CONACYT fellowship CN‐19‐29, and by the University Grants Program of San Diego State University.
Publisher Copyright:
© 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.
PY - 2023/3
Y1 - 2023/3
N2 - Multispecies interbreeding networks, or syngameons, have been increasingly reported in natural systems. However, the formation, structure, and maintenance of syngameons have received little attention. Through gene flow, syngameons can increase genetic diversity, facilitate the colonization of new environments, and contribute to hybrid speciation. In this study, we evaluated the history, patterns, and consequences of hybridization in a pinyon pine syngameon using morphological and genomic data to assess genetic structure, demographic history, and geographic and climatic data to determine niche differentiation. We demonstrated that Pinus edulis, a dominant species in the Southwestern US and a barometer of climate change, is a core participant in the syngameon, involved in the formation of two drought-adapted hybrid lineages including the parapatric and taxonomically controversial fallax-type. We found that species remain morphologically and genetically distinct at range cores, maintaining species boundaries while undergoing extensive gene flow in areas of sympatry at range peripheries. Our study shows that sequential hybridization may have caused relatively rapid speciation and facilitated the colonization of different niches, resulting in the rapid formation of two new lineages. Participation in the syngameon may allow adaptive traits to be introgressed across species barriers and provide the changes needed to survive future climate scenarios.
AB - Multispecies interbreeding networks, or syngameons, have been increasingly reported in natural systems. However, the formation, structure, and maintenance of syngameons have received little attention. Through gene flow, syngameons can increase genetic diversity, facilitate the colonization of new environments, and contribute to hybrid speciation. In this study, we evaluated the history, patterns, and consequences of hybridization in a pinyon pine syngameon using morphological and genomic data to assess genetic structure, demographic history, and geographic and climatic data to determine niche differentiation. We demonstrated that Pinus edulis, a dominant species in the Southwestern US and a barometer of climate change, is a core participant in the syngameon, involved in the formation of two drought-adapted hybrid lineages including the parapatric and taxonomically controversial fallax-type. We found that species remain morphologically and genetically distinct at range cores, maintaining species boundaries while undergoing extensive gene flow in areas of sympatry at range peripheries. Our study shows that sequential hybridization may have caused relatively rapid speciation and facilitated the colonization of different niches, resulting in the rapid formation of two new lineages. Participation in the syngameon may allow adaptive traits to be introgressed across species barriers and provide the changes needed to survive future climate scenarios.
KW - homoploid hybrid speciation
KW - hybridization
KW - multispecies
KW - pinyon pines
KW - range edges
KW - syngameon
UR - http://www.scopus.com/inward/record.url?scp=85127103267&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85127103267&partnerID=8YFLogxK
U2 - 10.1111/nph.18543
DO - 10.1111/nph.18543
M3 - Article
C2 - 36251538
AN - SCOPUS:85127103267
SN - 0028-646X
VL - 237
SP - 2435
EP - 2449
JO - New Phytologist
JF - New Phytologist
IS - 6
ER -