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Genome-Wide Association Mapping of Mixed Linkage (1,3;1,4)-beta-Glucan and Starch Contents in Rice Whole Grain

Panahabadi, Rahele and Ahmadikhah, Asadollah and McKee, Lauren S. and Ingvarsson, Pär and Farrokhi, Naser (2021). Genome-Wide Association Mapping of Mixed Linkage (1,3;1,4)-beta-Glucan and Starch Contents in Rice Whole Grain. Frontiers in Plant Science. 12 , 665745
[Research article]

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Abstract

The glucan content of rice is a key factor defining its nutritional and economic value. Starch and its derivatives have many industrial applications such as in fuel and material production. Non-starch glucans such as (1,3;1,4)-beta-D-glucan (mixed-linkage beta-glucan, MLG) have many benefits in human health, including lowering cholesterol, boosting the immune system, and modulating the gut microbiome. In this study, the genetic variability of MLG and starch contents were analyzed in rice (Oryza sativa L.) whole grain, by performing a new quantitative analysis of the polysaccharide content of rice grains. The 197 rice accessions investigated had an average MLG content of 252 mu g/mg, which was negatively correlated with the grain starch content. A new genome-wide association study revealed seven significant quantitative trait loci (QTLs) associated with the MLG content and two QTLs associated with the starch content in rice whole grain. Novel genes associated with the MLG content were a hexose transporter and anthocyanidin 5,3-O-glucosyltransferase. Also, the novel gene associated with the starch content was a nodulin-like domain. The data pave the way for a better understanding of the genes involved in determining both MLG and starch contents in rice grains and should facilitate future plant breeding programs.

Authors/Creators:Panahabadi, Rahele and Ahmadikhah, Asadollah and McKee, Lauren S. and Ingvarsson, Pär and Farrokhi, Naser
Title:Genome-Wide Association Mapping of Mixed Linkage (1,3;1,4)-beta-Glucan and Starch Contents in Rice Whole Grain
Series Name/Journal:Frontiers in Plant Science
Year of publishing :2021
Volume:12
Article number:665745
Number of Pages:14
Publisher:FRONTIERS MEDIA SA
ISSN:1664-462X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Food Science
Keywords:candidate gene, GWAS, MLG, Oryza sativa, SNP, starch
URN:NBN:urn:nbn:se:slu:epsilon-p-116856
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116856
Additional ID:
Type of IDID
DOI10.3389/fpls.2021.665745
Web of Science (WoS)000773554000001
ID Code:27710
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Plant Biology and Forest Genetics (until 131231)
Deposited By: SLUpub Connector
Deposited On:05 May 2022 14:25
Metadata Last Modified:05 May 2022 14:31

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