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Title: The buffering capacity of stems: genetic architecture of nonstructural carbohydrates in cultivated Asian rice, Oryza sativa

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. Furthermore, 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.

Authors:
 [1];  [1];  [2];  [1]
  1. Cornell Univ., Ithaca, NY (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1369121
Report Number(s):
NREL/JA-5100-68716
Journal ID: ISSN 0028-646X
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
New Phytologist
Additional Journal Information:
Journal Volume: 215; Journal Issue: 2; Journal ID: ISSN 0028-646X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; carbon allocation; climate; genome-wide association; near-infrared spectroscopy; nonstructural carbohydrates (NSC); Oryza sativa; plasticity

Citation Formats

Wang, Diane R., Han, Rongkui, Wolfrum, Edward J., and McCouch, Susan R. The buffering capacity of stems: genetic architecture of nonstructural carbohydrates in cultivated Asian rice, Oryza sativa. United States: N. p., 2017. Web. doi:10.1111/nph.14614.
Wang, Diane R., Han, Rongkui, Wolfrum, Edward J., & McCouch, Susan R. The buffering capacity of stems: genetic architecture of nonstructural carbohydrates in cultivated Asian rice, Oryza sativa. United States. https://doi.org/10.1111/nph.14614
Wang, Diane R., Han, Rongkui, Wolfrum, Edward J., and McCouch, Susan R. Tue . "The buffering capacity of stems: genetic architecture of nonstructural carbohydrates in cultivated Asian rice, Oryza sativa". United States. https://doi.org/10.1111/nph.14614. https://www.osti.gov/servlets/purl/1369121.
@article{osti_1369121,
title = {The buffering capacity of stems: genetic architecture of nonstructural carbohydrates in cultivated Asian rice, Oryza sativa},
author = {Wang, Diane R. and Han, Rongkui and Wolfrum, Edward J. and McCouch, Susan R.},
abstractNote = {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. Furthermore, 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.},
doi = {10.1111/nph.14614},
journal = {New Phytologist},
number = 2,
volume = 215,
place = {United States},
year = {Tue May 30 00:00:00 EDT 2017},
month = {Tue May 30 00:00:00 EDT 2017}
}

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Cited by: 20 works
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Figures / Tables:

Fig. 1 Fig. 1: Genetic architecture of stem nonstructural carbohydrates (NSC) in US tropical japonica rice. Genome-wide association results for stem NSC traits in US-TRJ (126 tropical japonica varieties): (a) starch at heading, (b) starch at maturity, (c) sucrose at heading and (d) sucrose at maturity. Red circles, single nucleotide polymorphisms (SNPs)more » significant at 0.01 false discovery rate (FDR); yellow boxes, peaks supported by at least two significant SNPs that localize within 500 kb of each other; blue dashed arrow, regions on chromosomes 1 and 11 that are significant across traits. Note that some regions highlighted in yellow appear to be singleton SNPs but are actually multiple, closely linked markers that overlap visually (Supporting Information Table S19).« less

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Functional Diversity of Isoamylase Oligomers: The ISA1 Homo-Oligomer Is Essential for Amylopectin Biosynthesis in Rice Endosperm
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journal, November 2016


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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.