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GrainGenes Reference Report: CRS-48-2141

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Reference	CRS-48-2141
Title	QTLs Affecting alpha-Tocotrienol, alpha-Tocopherol, and Total Tocopherol Concentrations Detected in the Ogle/TAM O-301 Oat Mapping Population
Journal	Crop Science
Year	2008
Volume	48
Pages	2141-2152
Author	Jackson EW [ Show all 6 ]
Abstract	Consumption of oat (Avena sativa L.) products has been credited with reducing the risk of various diseases. This may be due in part to tocopherol content. Studies have shown variation in alpha-tocotrienol, alpha-tocopherol, and total tocopherol levels among oat cultivars, however, the genetic basis of these traits is unknown. The objectives of this study were to examine the genetic mechanisms affecting tocopherol levels in the Ogle1040/TAM O-301 population and to identify quantitative trait loci (QTLs) useful for improving tocopherol levels in oat. The population was grown in Aberdeen and Tetonia, ID, over 4 yr. Alpha-tocotrienol, alpha-tocopherol, and total tocopherol contents were measured in harvested seed. Mean levels of all three tocopherol measurements were higher from the irrigated Aberdeen location than from the nonirrigated Tetonia location. One major and four minor QTLs were detected, which accounted for a majority of the alpha-tocotrienol variation across all locations, while six minor QTLs accounted for a majority of the alpha-tocopherol variation. Only one QTL affecting total tocopherol was detected apart from QTLs affecting alpha-tocotrienol and alpha-tocopherol. Overall, we have identified markers linked to QTLs affecting alpha-tocotrienol and alpha-tocopherol. Since the highest level of both tocopherols in lines of the population were higher than from previously tested cultivars, these QTLs should be useful to increase specific tocopherol levels.
External Databases	http://dx.doi.org/10.2135/cropsci2007.11.0658
Map Data	Oat-2008-OxT-Toco
QTL	QTocR-Abe99.OxT-Toco_8 [ Show all 46 ]

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