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PLoS One. 2015 Jul 24;10(7):e0133767. doi: 10.1371/journal.pone.0133767. eCollection 2015.

Quantitative Trait Loci Associated with the Tocochromanol (Vitamin E) Pathway in Barley.

Author information

1
Department of Crop and Soil Science, Oregon State University, Corvallis, Oregon, United States of America.
2
Cereal Crops Research, USDA-ARS, Madison, Wisconsin, United States of America.
3
Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, United States of America.
4
Plant Sciences and Plant Pathology Department, Montana State University, Bozeman, Montana, United States of America.
5
Crop Improvement and Genetics Research, USDA-ARS, Albany, California, United States of America.
6
Busch Agricultural Resources, Inc., Fort Collins, Colorado, United States of America.
7
USDA-ARS Cereal Crops Research Unit, Fargo, North Dakota, United States of America.
8
Plants, Soils, and Climate Department, Utah State University, Logan, Utah, United States of America.
9
Department of Plant Sciences, North Dakota State University, Fargo, North Dakota, United States of America.
10
Limagrain Cereal Seeds, Lafayette, Indiana, United States of America.
11
Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota, United States of America.
12
Department of Crop and Soil Science, Washington State University, Pullman, Washington, United States of America.

Abstract

The Genome-Wide Association Studies approach was used to detect Quantitative Trait Loci associated with tocochromanol concentrations using a panel of 1,466 barley accessions. All major tocochromanol types- α-, β-, δ-, γ-tocopherol and tocotrienol- were assayed. We found 13 single nucleotide polymorphisms associated with the concentration of one or more of these tocochromanol forms in barley, seven of which were within 2 cM of sequences homologous to cloned genes associated with tocochromanol production in barley and/or other plants. These associations confirmed a prior report based on bi-parental QTL mapping. This knowledge will aid future efforts to better understand the role of tocochromanols in barley, with specific reference to abiotic stress resistance. It will also be useful in developing barley varieties with higher tocochromanol concentrations, although at current recommended daily consumption amounts, barley would not be an effective sole source of vitamin E. However, it could be an important contributor in the context of whole grains in a balanced diet.

PMID:
26208213
PMCID:
PMC4514886
DOI:
10.1371/journal.pone.0133767
[Indexed for MEDLINE]
Free PMC Article

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