We are Still Learning About the Nature of Species and Their Evolutionary Relationships<sup>1</sup>

Lockhart, Peter J.; Larkum, Anthony W. D.; Becker, Matthias; Penny, David

doi:10.3417/2012084

Cited by 5 publications

(2 citation statements)

References 56 publications

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“…12, star) from the North Island and not with the remaining samples of C. obscurus. Such non-monophyletic relationships are not unusual in NZ plants (Lockhart et al 2001, Lockhart et al 2014. A larger phylogeographic study including both orchid species using molecular markers with greater variability would be required to test whether past hybrisation has occurred in NZ Corybas.…”

Section: Discussionmentioning

confidence: 99%

Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade

et al. 2016

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Five new species of Corybas endemic to New Zealand, C. confusus, C. obscurus, C. sanctigeorgianus, C. vitreus, and C. wallii are described. These species are segregated from the Corybas trilobus aggregate based on morphometric and DNA fingerprinting (AFLP) analyses. A key to the new species is also provided, and their distribution and conservation status are included. Phylogenetic results showed that, despite the great morphological and ecological diversity of these orchids, genetic divergence between species is low, suggesting recent diversification. We also found evidence for multiple dispersal events from New Zealand to several offshore and sub-Antarctic islands.

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Section: Discussionmentioning

confidence: 99%

Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade

et al. 2016

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“…Regarding point 1, informed by the findings of genomes and genetic data, our understanding of the nature of species has been changing ( Mallet 2007 ; Mavarez and Linares 2008 ; Dunn et al 2012 ; Abbott et al 2013 ; Becker et al 2013 ; Lockhart et al 2014 ; Muhlfeld et al 2014 ), and has become a much more complex concept than the standard mathematical idealization where one branch splits instantaneously into two. While genetic incompatibilities between populations might build up gradually over time and space ( Mallet 2005 ; Gourbiere and Mallet 2010 ; Abbott et al 2013 ), ecological and morphological diversification can be rapid (e.g., Doebley 2006 ; Linder 2008 ; Lamichhaney et al 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Simulating and Summarizing Sources of Gene Tree Incongruence

2016

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We introduce a gene tree simulator that is designed for use in conjunction with approximate Bayesian computation approaches. We show that it can be used to determine the relative importance of hybrid speciation and introgression compared with incomplete lineage sorting (ILS) in producing patterns of incongruence across gene trees. Important features of the new simulator are (1) a choice of models to capture the decreasing probability of successful hybrid species formation or introgression as a function of genetic distance between potential parent species; (2) the ability for hybrid speciation to result in asymmetrical contributions of genetic material from each parent species; (3) the ability to vary the rates of hybrid speciation, introgression, and divergence speciation in different epochs; and (4) incorporation of the coalescent, so that patterns of incongruence due to ILS can be compared with those due to hybrid evolution. Given a set of gene trees generated by the simulator, we calculate a set of statistics, each measuring in a different way the discordance between the gene trees. We show that these statistics can be used to differentiate whether the gene tree discordance was largely due to hybridization, or only due to lineage sorting.

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Evolution and Biogeography of Seagrasses

Larkum

Waycott

Conran

2018

Seagrasses of Australia

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We are Still Learning About the Nature of Species and Their Evolutionary Relationships¹

Cited by 5 publications

References 56 publications

Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade

Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade

Simulating and Summarizing Sources of Gene Tree Incongruence

Evolution and Biogeography of Seagrasses

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We are Still Learning About the Nature of Species and Their Evolutionary Relationships1

Cited by 5 publications

References 56 publications

Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade

Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade

Simulating and Summarizing Sources of Gene Tree Incongruence

Evolution and Biogeography of Seagrasses

Contact Info

Product

Resources

About

We are Still Learning About the Nature of Species and Their Evolutionary Relationships¹