The Buffering Capacity of Stems: Genetic Architecture of Nonstructural Carbohydrates in Cultivated Asian Rice, Oryza sativa

Edward Wolfrum, Diane Wang, Rongkui Han, Susan McCouch

Research output: Contribution to journalArticlepeer-review

24 Scopus Citations

Abstract

Harnessing stem carbohydrate dynamics in grasses offers an opportunity to help meet future demands for plant-based food, fiber and fuel production, but requires a greater understanding of the genetic controls that govern the synthesis, interconversion and transport of such energy reserves. We map out a blueprint of the genetic architecture of rice (Oryza sativa) stem nonstructural carbohydrates (NSC) at two critical developmental time-points using a subpopulation-specific genome-wide association approach on two diverse germplasm panels followed by quantitative trait loci (QTL) mapping in a biparental population. Overall, 26 QTL are identified; three are detected in multiple panels and are associated with starch-at-maturity, sucrose-at-maturity and NSC-at-heading. They tag OsHXK6 (rice hexokinase), ISA2 (rice isoamylase) and a tandem array of sugar transporters. This study provides the foundation for more in-depth molecular investigation to validate candidate genes underlying rice stem NSC and informs future comparative studies in other agronomically vital grass species.

Original languageAmerican English
Pages (from-to)658-671
Number of pages14
JournalNew Phytologist
Volume215
Issue number2
DOIs
StatePublished - Jul 2017

Bibliographical note

Publisher Copyright:
© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust

NREL Publication Number

  • NREL/JA-5100-68716

Keywords

  • carbon allocation
  • climate
  • genome-wide association
  • near-infrared spectroscopy
  • nonstructural carbohydrates (NSC)
  • Oryza sativa
  • plasticity

Fingerprint

Dive into the research topics of 'The Buffering Capacity of Stems: Genetic Architecture of Nonstructural Carbohydrates in Cultivated Asian Rice, Oryza sativa'. Together they form a unique fingerprint.

Cite this