The extent of adaptive wild introgression in crops

Garrett M. Janzen, Li Wang, Matthew B. Hufford

Research output: Contribution to journalReview articlepeer-review

66 Scopus citations

Abstract

The study of crop evolution has focused primarily on the process of initial domestication. Post-domestication adaptation during the expansion of crops from their centers of origin has received considerably less attention. Recent research has revealed that, in at least some instances, crops have received introgression from their wild relatives that has facilitated adaptation to novel conditions encountered during expansion. Such adaptive introgression could have an important impact on the basic study of domestication, affecting estimates of several evolutionary processes of interest (e.g. the strength of the domestication bottleneck, the timing of domestication, the targets of selection during domestication). Identification of haplotypes introgressed from the wild may also help in the identification of alleles that are beneficial under particular environmental conditions. Here we review mounting evidence for substantial adaptive wild introgression in several crops and consider the implications of such gene flow to our understanding of crop histories.

Original languageEnglish
Pages (from-to)1279-1288
Number of pages10
JournalNew Phytologist
Volume221
Issue number3
DOIs
StatePublished - 1 Feb 2019
Externally publishedYes

Keywords

  • adaptation
  • domestication
  • gene flow
  • introgression
  • wild relatives

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