Locating evolutionary precursors on a phylogenetic tree

Brigitte Marazzi, Cécile Ané, Marcelo F. Simon, Alfonso Delgado-Salinas, Melissa Luckow, Michael Sanderson

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Conspicuous innovations in the history of life are often preceded by more cryptic genetic and developmental precursors. In many cases, these appear to be associated with recurring origins of very similar traits in close relatives (parallelisms) or striking convergences separated by deep time (deep homologies). Although the phylogenetic distribution of gain and loss of traits hints strongly at the existence of such precursors, no models of trait evolution currently permit inference about their location on a tree. Here we develop a new stochastic model, which explicitly captures the dependency implied by a precursor and permits estimation of precursor locations. We apply it to the evolution of extrafloral nectaries (EFNs), an ecologically significant trait mediating a widespread mutualism between plants and ants. In legumes, a species-rich clade with morphologically diverse EFNs, the precursor model fits the data on EFN occurrences significantly better than conventional models. The model generates explicit hypotheses about the phylogenetic location of hypothetical precursors, which may help guide future studies of molecular genetic pathways underlying nectary position, development, and function.

Original languageEnglish (US)
Pages (from-to)3918-3930
Number of pages13
JournalEvolution
Volume66
Issue number12
DOIs
StatePublished - Dec 2012

Fingerprint

Symbiosis
Ants
nectary
Fabaceae
nectaries
Molecular Biology
History
phylogenetics
phylogeny
mutualism
homology
molecular genetics
ant
Formicidae
innovation
legumes
life history
history

Keywords

  • Deep homology
  • Extra-floral nectary
  • Homoplasy
  • Trait evolution

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Ecology, Evolution, Behavior and Systematics
  • Genetics

Cite this

Marazzi, B., Ané, C., Simon, M. F., Delgado-Salinas, A., Luckow, M., & Sanderson, M. (2012). Locating evolutionary precursors on a phylogenetic tree. Evolution, 66(12), 3918-3930. https://doi.org/10.1111/j.1558-5646.2012.01720.x

Locating evolutionary precursors on a phylogenetic tree. / Marazzi, Brigitte; Ané, Cécile; Simon, Marcelo F.; Delgado-Salinas, Alfonso; Luckow, Melissa; Sanderson, Michael.

In: Evolution, Vol. 66, No. 12, 12.2012, p. 3918-3930.

Research output: Contribution to journalArticle

Marazzi, B, Ané, C, Simon, MF, Delgado-Salinas, A, Luckow, M & Sanderson, M 2012, 'Locating evolutionary precursors on a phylogenetic tree', Evolution, vol. 66, no. 12, pp. 3918-3930. https://doi.org/10.1111/j.1558-5646.2012.01720.x
Marazzi B, Ané C, Simon MF, Delgado-Salinas A, Luckow M, Sanderson M. Locating evolutionary precursors on a phylogenetic tree. Evolution. 2012 Dec;66(12):3918-3930. https://doi.org/10.1111/j.1558-5646.2012.01720.x
Marazzi, Brigitte ; Ané, Cécile ; Simon, Marcelo F. ; Delgado-Salinas, Alfonso ; Luckow, Melissa ; Sanderson, Michael. / Locating evolutionary precursors on a phylogenetic tree. In: Evolution. 2012 ; Vol. 66, No. 12. pp. 3918-3930.
@article{7cc47edd89ab4255a8552df68eba62d9,
title = "Locating evolutionary precursors on a phylogenetic tree",
abstract = "Conspicuous innovations in the history of life are often preceded by more cryptic genetic and developmental precursors. In many cases, these appear to be associated with recurring origins of very similar traits in close relatives (parallelisms) or striking convergences separated by deep time (deep homologies). Although the phylogenetic distribution of gain and loss of traits hints strongly at the existence of such precursors, no models of trait evolution currently permit inference about their location on a tree. Here we develop a new stochastic model, which explicitly captures the dependency implied by a precursor and permits estimation of precursor locations. We apply it to the evolution of extrafloral nectaries (EFNs), an ecologically significant trait mediating a widespread mutualism between plants and ants. In legumes, a species-rich clade with morphologically diverse EFNs, the precursor model fits the data on EFN occurrences significantly better than conventional models. The model generates explicit hypotheses about the phylogenetic location of hypothetical precursors, which may help guide future studies of molecular genetic pathways underlying nectary position, development, and function.",
keywords = "Deep homology, Extra-floral nectary, Homoplasy, Trait evolution",
author = "Brigitte Marazzi and C{\'e}cile An{\'e} and Simon, {Marcelo F.} and Alfonso Delgado-Salinas and Melissa Luckow and Michael Sanderson",
year = "2012",
month = "12",
doi = "10.1111/j.1558-5646.2012.01720.x",
language = "English (US)",
volume = "66",
pages = "3918--3930",
journal = "Evolution; international journal of organic evolution",
issn = "0014-3820",
publisher = "Society for the Study of Evolution",
number = "12",

}

TY - JOUR

T1 - Locating evolutionary precursors on a phylogenetic tree

AU - Marazzi, Brigitte

AU - Ané, Cécile

AU - Simon, Marcelo F.

AU - Delgado-Salinas, Alfonso

AU - Luckow, Melissa

AU - Sanderson, Michael

PY - 2012/12

Y1 - 2012/12

N2 - Conspicuous innovations in the history of life are often preceded by more cryptic genetic and developmental precursors. In many cases, these appear to be associated with recurring origins of very similar traits in close relatives (parallelisms) or striking convergences separated by deep time (deep homologies). Although the phylogenetic distribution of gain and loss of traits hints strongly at the existence of such precursors, no models of trait evolution currently permit inference about their location on a tree. Here we develop a new stochastic model, which explicitly captures the dependency implied by a precursor and permits estimation of precursor locations. We apply it to the evolution of extrafloral nectaries (EFNs), an ecologically significant trait mediating a widespread mutualism between plants and ants. In legumes, a species-rich clade with morphologically diverse EFNs, the precursor model fits the data on EFN occurrences significantly better than conventional models. The model generates explicit hypotheses about the phylogenetic location of hypothetical precursors, which may help guide future studies of molecular genetic pathways underlying nectary position, development, and function.

AB - Conspicuous innovations in the history of life are often preceded by more cryptic genetic and developmental precursors. In many cases, these appear to be associated with recurring origins of very similar traits in close relatives (parallelisms) or striking convergences separated by deep time (deep homologies). Although the phylogenetic distribution of gain and loss of traits hints strongly at the existence of such precursors, no models of trait evolution currently permit inference about their location on a tree. Here we develop a new stochastic model, which explicitly captures the dependency implied by a precursor and permits estimation of precursor locations. We apply it to the evolution of extrafloral nectaries (EFNs), an ecologically significant trait mediating a widespread mutualism between plants and ants. In legumes, a species-rich clade with morphologically diverse EFNs, the precursor model fits the data on EFN occurrences significantly better than conventional models. The model generates explicit hypotheses about the phylogenetic location of hypothetical precursors, which may help guide future studies of molecular genetic pathways underlying nectary position, development, and function.

KW - Deep homology

KW - Extra-floral nectary

KW - Homoplasy

KW - Trait evolution

UR - http://www.scopus.com/inward/record.url?scp=84870495664&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84870495664&partnerID=8YFLogxK

U2 - 10.1111/j.1558-5646.2012.01720.x

DO - 10.1111/j.1558-5646.2012.01720.x

M3 - Article

C2 - 23206146

AN - SCOPUS:84870495664

VL - 66

SP - 3918

EP - 3930

JO - Evolution; international journal of organic evolution

JF - Evolution; international journal of organic evolution

SN - 0014-3820

IS - 12

ER -