The molecular basis of white pericarps in African domesticated rice: Novel mutations at the Rc gene

B. L. Gross, F. T. Steffen, K. M. Olsen

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Repeated phenotypic evolution can occur at both the inter- and intraspecific level and is especially prominent in domesticated plants, where artificial selection has favoured the same traits in many different species and varieties. The question of whether repeated evolution reflects changes at the same or different genes in each lineage can now be addressed using the domestication and improvement genes that have been identified in a variety of crops. Here, we document the genetic basis of nonpigmented ('white') pericarps in domesticated African rice (Oryza glaberrima) and compare it with the known genetic basis of the same trait in domesticated Asian rice (Oryza sativa). In some cases, white pericarps in African rice are apparently caused by unique mutations at the Rc gene, which also controls pericarp colour variation in Asian rice. In one case, white pericarps appear to reflect changes at a different gene or potentially a cis-regulatory region.

Original languageEnglish (US)
Pages (from-to)2747-2753
Number of pages7
JournalJournal of evolutionary biology
Volume23
Issue number12
DOIs
StatePublished - Dec 2010

Keywords

  • Domestication
  • Grain colour
  • Oryza glaberrima
  • Oryza sativa
  • Parallel evolution
  • Proanthocyanidin

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