Patterns and Processes of Diploidization in Land Plants

Zheng Li, Michael T.W. McKibben, Geoffrey S. Finch, Paul D. Blischak, Brittany L. Sutherland, Michael S. Barker

Research output: Contribution to journalReview articlepeer-review

Abstract

Most land plants are now known to be ancient polyploids that have rediploidized. Diploidization involves many changes in genome organization that ultimately restore bivalent chromosome pairing and disomic inheritance, and resolve dosage and other issues caused by genome duplication. In this review, we discuss the nature of polyploidy and its impact on chromosome pairing behavior. We also provide an overview of two major and largely independent processes of diploidization: cytological diploidization and genic diploidization/fractionation. Finally, we compare variation in gene fractionation across land plants and highlight the differences in diploidization between plants and animals. Altogether, we demonstrate recent advancements in our understanding of variation in the patterns and processes of diploidization in land plants and provide a road map for future research to unlock the mysteries of diploidization and eukaryotic genome evolution.

Original languageEnglish (US)
Pages (from-to)387-410
Number of pages24
JournalAnnual Review of Plant Biology
Volume72
DOIs
StatePublished - Jun 17 2021

Keywords

  • chromosome pairing
  • diploidization
  • genome evolution
  • genome fractionation
  • plant genomics
  • polyploidy

ASJC Scopus subject areas

  • Physiology
  • Molecular Biology
  • Plant Science
  • Cell Biology

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