BishtRef
Articles Journals Publishers Authors Subjects Most Cited New Papers Year Stats Open Access
journal article Open Access Apr 29, 2019

Tracing the footprints of a moving hybrid zone under a demographic history of speciation with gene flow

Mitra Menon ORCID Erin Landguth Alejandro Leal‐Saenz Justin C. Bagley Anna W. Schoettle ORCID Christian Wehenkel Lluvia Flores‐Renteria Samuel A. Cushman Kristen M. Waring Andrew J. Eckert
Evolutionary Applications Vol. 13 No. 1 pp. 195-209 · Wiley
View at Publisher Save 10.1111/eva.12795
Abstract
AbstractA lack of optimal gene combinations, as well as low levels of genetic diversity, is often associated with the formation of species range margins. Conservation efforts rely on predictive modelling using abiotic variables and assessments of genetic diversity to determine target species and populations for controlled breeding, germplasm conservation and assisted migration. Biotic factors such as interspecific competition and hybridization, however, are largely ignored, despite their prevalence across diverse taxa and their role as key evolutionary forces. Hybridization between species with well‐developed barriers to reproductive isolation often results in the production of offspring with lower fitness. Generation of novel allelic combinations through hybridization, however, can also generate positive fitness consequences. Despite this possibility, hybridization‐mediated introgression is often considered a threat to biodiversity as it can blur species boundaries. The contribution of hybridization towards increasing genetic diversity of populations at range margins has only recently gathered attention in conservation studies. We assessed the extent to which hybridization contributes towards range dynamics by tracking spatio‐temporal changes in the central location of a hybrid zone between two recently diverged species of pines: Pinus strobiformis and P. flexilis. By comparing geographic cline centre estimates for global admixture coefficient with morphological traits associated with reproductive output, we demonstrate a northward shift in the hybrid zone. Using a combination of spatially explicit, individual‐based simulations and linkage disequilibrium variance partitioning, we note a significant contribution of adaptive introgression towards this northward movement, despite the potential for differences in regional population size to aid hybrid zone movement. Overall, our study demonstrates that hybridization between recently diverged species can increase genetic diversity and generate novel allelic combinations. These novel combinations may allow range margin populations to track favourable climatic conditions or facilitate adaptive evolution to ongoing and future climate change.
Topics

No keywords indexed for this article. Browse by subject →

References
93
[8]
Bisbee J. "Cone morphology of the Pinus ayacahuite‐flexilis complex of the southwestern United States and Mexico" Bulletin of the Cupressus Conservation Project (2014)
[23]
Frankis M. "The high altitude white pines of Mexico and the adjacent SW USA (Pinus L. subgenus Strobus Lemmon, Pinaceae)" International Dendrology Society Yearbook (2009)
[28]
Goodrich B. A. (2018)
[33]
Hijmans R. J.(2017).geosphere: Spherical trigonometry. R package version 1.5‐7.
[40]
Larson M. (1987) 10.5962/bhl.title.149885
[43]
Leal‐Saenz A. "Morphological differences in Pinus strobiformis across latitudinal and elevational gradients" Frontier in Plant Science (2018)

Showing 50 of 93 references

Metrics
28
Citations
93
References
Details
Published
Apr 29, 2019
Vol/Issue
13(1)
Pages
195-209
License
View
Authors
M
Mitra Menon

Integrative Life Sciences Virginia Commonwealth University Richmond Virginia

E
Erin Landguth

School of Public and Community Health Sciences University of Montana Missoula Montana

A
Alejandro Leal‐Saenz

Programa Institucional de Doctorado en Ciencias Agropecuarias y Forestales Universidad Juárez del Estado de Durango Durango Mexico

J
Justin C. Bagley

Department of Biology Virginia Commonwealth University Richmond Virginia

A
Anna W. Schoettle

Rocky Mountain Research Station USDA Forest Service Fort Collins Colorado

C
Christian Wehenkel

Instituto de Silvicultura e Industria de la Madera Universidad Juarez del Estado de Durango Durango Mexico

L
Lluvia Flores‐Renteria

Department of Biology San Diego State University San Diego California

S
Samuel A. Cushman

Rocky Mountain Research Station USDA Forest Service Flagstaff Arizona

K
Kristen M. Waring

School of Forestry Northern Arizona University Flagstaff Arizona

A
Andrew J. Eckert

Department of Biology Virginia Commonwealth University Richmond Virginia

Funding
National Science Foundation Award: DEB-1340852
Virginia Commonwealth University
Cite This Article
Mitra Menon, Erin Landguth, Alejandro Leal‐Saenz, et al. (2019). Tracing the footprints of a moving hybrid zone under a demographic history of speciation with gene flow. Evolutionary Applications, 13(1), 195-209. https://doi.org/10.1111/eva.12795
Related

You May Also Like

Climate change, adaptation, and phenotypic plasticity: the problem and the evidence

Juha Merilä, Andrew P. Hendry · 2014

1,083 citations

Evolution and behavioural responses to human‐induced rapid environmental change

Andrew Sih, Maud C. O. Ferrari · 2011

1,040 citations

Linkage disequilibrium estimates of contemporary Ne using highly variable genetic markers: a largely untapped resource for applied conservation and evolution

Robin S. Waples, Chi Do · 2010

863 citations

Hybridization and extinction

Marco Todesco, Mariana A. Pascual · 2016

713 citations

Building evolutionary resilience for conserving biodiversity under climate change

Carla M. Sgrò, Andrew J. Lowe · 2010

662 citations