Archaeological data reveal slow rates of evolution during plant domestication

Michael D. Purugganan, Dorian Q. Fuller

Research output: Contribution to journalArticle

Abstract

Domestication is an evolutionary process of species divergence in which morphological and physiological changes result from the cultivation/tending of plant or animal species by a mutualistic partner, most prominently humans. Darwin used domestication as an analogy to evolution by natural selection although there is strong debate on whether this process of species evolution by human association is an appropriate model for evolutionary study. There is a presumption that selection under domestication is strong and most models assume rapid evolution of cultivated species. Using archaeological data for 11 species from 60 archaeological sites, we measure rates of evolution in two plant domestication traits-nonshattering and grain/seed size increase. Contrary to previous assumptions, we find the rates of phenotypic evolution during domestication are slow, and significantly lower or comparable to those observed among wild species subjected to natural selection. Our study indicates that the magnitudes of the rates of evolution during the domestication process, including the strength of selection, may be similar to those measured for wild species. This suggests that domestication may be driven by unconscious selection pressures similar to that observed for natural selection, and the study of the domestication process may indeed prove to be a valid model for the study of evolutionary change.

Original languageEnglish (US)
Pages (from-to)171-183
Number of pages13
JournalEvolution
Volume65
Issue number1
DOIs
StatePublished - Jan 2011

Fingerprint

domestication
Genetic Selection
natural selection
seed size
rate
Domestication
plant cultural practices
Seeds
divergence
Pressure
seeds

Keywords

  • Archaeobotany
  • Artificial selection
  • Darwins
  • Haldanes
  • Natural selection

ASJC Scopus subject areas

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

Cite this

Archaeological data reveal slow rates of evolution during plant domestication. / Purugganan, Michael D.; Fuller, Dorian Q.

In: Evolution, Vol. 65, No. 1, 01.2011, p. 171-183.

Research output: Contribution to journalArticle

@article{df1327dfb44a461db197236bfa9e9a76,
title = "Archaeological data reveal slow rates of evolution during plant domestication",
abstract = "Domestication is an evolutionary process of species divergence in which morphological and physiological changes result from the cultivation/tending of plant or animal species by a mutualistic partner, most prominently humans. Darwin used domestication as an analogy to evolution by natural selection although there is strong debate on whether this process of species evolution by human association is an appropriate model for evolutionary study. There is a presumption that selection under domestication is strong and most models assume rapid evolution of cultivated species. Using archaeological data for 11 species from 60 archaeological sites, we measure rates of evolution in two plant domestication traits-nonshattering and grain/seed size increase. Contrary to previous assumptions, we find the rates of phenotypic evolution during domestication are slow, and significantly lower or comparable to those observed among wild species subjected to natural selection. Our study indicates that the magnitudes of the rates of evolution during the domestication process, including the strength of selection, may be similar to those measured for wild species. This suggests that domestication may be driven by unconscious selection pressures similar to that observed for natural selection, and the study of the domestication process may indeed prove to be a valid model for the study of evolutionary change.",
keywords = "Archaeobotany, Artificial selection, Darwins, Haldanes, Natural selection",
author = "Purugganan, {Michael D.} and Fuller, {Dorian Q.}",
year = "2011",
month = "1",
doi = "10.1111/j.1558-5646.2010.01093.x",
language = "English (US)",
volume = "65",
pages = "171--183",
journal = "Evolution; international journal of organic evolution",
issn = "0014-3820",
publisher = "Society for the Study of Evolution",
number = "1",

}

TY - JOUR

T1 - Archaeological data reveal slow rates of evolution during plant domestication

AU - Purugganan, Michael D.

AU - Fuller, Dorian Q.

PY - 2011/1

Y1 - 2011/1

N2 - Domestication is an evolutionary process of species divergence in which morphological and physiological changes result from the cultivation/tending of plant or animal species by a mutualistic partner, most prominently humans. Darwin used domestication as an analogy to evolution by natural selection although there is strong debate on whether this process of species evolution by human association is an appropriate model for evolutionary study. There is a presumption that selection under domestication is strong and most models assume rapid evolution of cultivated species. Using archaeological data for 11 species from 60 archaeological sites, we measure rates of evolution in two plant domestication traits-nonshattering and grain/seed size increase. Contrary to previous assumptions, we find the rates of phenotypic evolution during domestication are slow, and significantly lower or comparable to those observed among wild species subjected to natural selection. Our study indicates that the magnitudes of the rates of evolution during the domestication process, including the strength of selection, may be similar to those measured for wild species. This suggests that domestication may be driven by unconscious selection pressures similar to that observed for natural selection, and the study of the domestication process may indeed prove to be a valid model for the study of evolutionary change.

AB - Domestication is an evolutionary process of species divergence in which morphological and physiological changes result from the cultivation/tending of plant or animal species by a mutualistic partner, most prominently humans. Darwin used domestication as an analogy to evolution by natural selection although there is strong debate on whether this process of species evolution by human association is an appropriate model for evolutionary study. There is a presumption that selection under domestication is strong and most models assume rapid evolution of cultivated species. Using archaeological data for 11 species from 60 archaeological sites, we measure rates of evolution in two plant domestication traits-nonshattering and grain/seed size increase. Contrary to previous assumptions, we find the rates of phenotypic evolution during domestication are slow, and significantly lower or comparable to those observed among wild species subjected to natural selection. Our study indicates that the magnitudes of the rates of evolution during the domestication process, including the strength of selection, may be similar to those measured for wild species. This suggests that domestication may be driven by unconscious selection pressures similar to that observed for natural selection, and the study of the domestication process may indeed prove to be a valid model for the study of evolutionary change.

KW - Archaeobotany

KW - Artificial selection

KW - Darwins

KW - Haldanes

KW - Natural selection

UR - http://www.scopus.com/inward/record.url?scp=78650957427&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78650957427&partnerID=8YFLogxK

U2 - 10.1111/j.1558-5646.2010.01093.x

DO - 10.1111/j.1558-5646.2010.01093.x

M3 - Article

C2 - 20666839

AN - SCOPUS:78650957427

VL - 65

SP - 171

EP - 183

JO - Evolution; international journal of organic evolution

JF - Evolution; international journal of organic evolution

SN - 0014-3820

IS - 1

ER -