Pleistocene diversification in an ancient lineage: a role for glacial cycles in the evolutionary history of Dioon Lindl. (Zamiaceae)

American Journal of Botany
Brian L DorseyChelsea D Specht

Abstract

Recent estimates of crown ages for cycad genera (Late Miocene) challenge us to consider what processes have produced the extant diversity of this ancient group in such relatively little time. Pleistocene climate change has driven major shifts in species distributions in Mexico and may have led to speciation in the genus Dioon by forcing populations to migrate up in elevation, thereby becoming separated by topography. We inferred orthologs from transcriptomes of five species and sequenced these in 42 individuals representing all Dioon species. From these data and published plastid sequences, we inferred dated species trees and lineage-specific diversification rates. Analyses of 84 newly sequenced nuclear orthologs and published plastid data confirm four major clades within Dioon, all of Pleistocene age. Gene tree analysis, divergence dates, and an increase in diversification rate support very recent and rapid divergence of extant taxa. This study confirms the Pleistocene age of Dioon species and implicates Pleistocene climate change and established topography in lineage spitting. These results add to our understanding of the cycads as evolutionarily dynamic lineages, not relicts or evolutionary dead ends. We also find that well-...Continue Reading

References

Oct 30, 2001·Evolution; International Journal of Organic Evolution·S Magallón, M J Sanderson
Sep 4, 2003·Genome Research·Li LiDavid S Roos
Sep 19, 2003·Molecular Phylogenetics and Evolution·Hardeep S RaiSean W Graham
Dec 9, 2003·Genome Biology·Eric D BrennerGloria M Coruzzi
Mar 23, 2004·Nucleic Acids Research·Robert C Edgar
May 10, 2005·Molecular Phylogenetics and Evolution·H Peter LinderFrank Rutschmann
Jul 22, 2005·Proceedings of the National Academy of Sciences of the United States of America·Judith X Becerra
Sep 27, 2005·Molecular Phylogenetics and Evolution·Shu-Miaw ChawShin-Hsiao Chen
Jan 30, 2007·Molecular Ecology·Bryan C Carstens, L Lacey Knowles
Jul 11, 1969·Science·J Haffer
Apr 22, 2008·Molecular Phylogenetics and Evolution·Jessie M ZgurskiSean W Graham
Oct 4, 2008·Science·Stephen A Smith, Michael J Donoghue
Mar 25, 2009·Trends in Ecology & Evolution·James H Degnan, Noah A Rosenberg
Jul 28, 2009·Proceedings of the National Academy of Sciences of the United States of America·Michael E AlfaroLuke J Harmon
Nov 13, 2009·Molecular Biology and Evolution·Joseph Heled, Alexei J Drummond
Mar 17, 2010·Bioinformatics·Remco R Bouckaert
May 1, 2006·American Journal of Botany·Elizabeth J HermsenDennis Wm Stevenson
Sep 29, 2011·BMC Evolutionary Biology·Richard P Brown, Ziheng Yang
Oct 25, 2011·Science·N S NagalingumS Mathews
Dec 27, 2011·Molecular Phylogenetics and Evolution·John E McCormackRobb T Brumfield
Jan 4, 2012·Systematic Biology·Nicholas D LevsenMatthew S Olson
Feb 10, 2012·Molecular Biology and Evolution·Robert LanfearStephane Guindon
Aug 1, 2012·Nature Methods·Diego DarribaDavid Posada
Sep 5, 2012·The Journal of Heredity·Hermilo Sánchez-SánchezKen Oyama
Apr 12, 2014·PLoS Computational Biology·Remco BouckaertAlexei J Drummond
Dec 10, 2015·Evolutionary Bioinformatics Online·William A Freyman
May 18, 2016·Molecular Biology and Evolution·Erfan Sayyari, Siavash Mirarab
Aug 12, 2016·Proceedings of the National Academy of Sciences of the United States of America·Brian R MooreJohn P Huelsenbeck
Apr 22, 2017·Molecular Biology and Evolution·Huw A OgilvieAlexei J Drummond

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.