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GrainGenes Reference Report: TAG-98-884

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Reference
TAG-98-884
Title
Association of a major groat oil content QTL and an acetyl-CoA carboxylase gene in oat.
Journal
Theoretical and Applied Genetics
Year
1999
Volume
98
Pages
884-894
Author
Kianian SF
[ Show all 14 ]
Abstract
Oat groats are unique among cereals for the high level and the embryo-plus-endosperm localization of lipids. Genetic manipulation of groat quality traits such as oil is desired for optimizing the value of oat in human and livestock diets. A locus having a major effect on oil content in oat groats was located on linkage group 11 by single-factor analysis of variance, simple interval mapping and simplified composite interval mapping. A partial oat cDNA clone for plastidic acetyl-CoA carboxylase (ACCase), which catalyzes the first committed step in de novo fatty acid synthesis, identified a polymorphism linked to this major QTL. Similar QTL and ACCase locus placements were obtained with two recombinant inbred populations, 'Kanota'x'Ogle' (KO) and 'Kanota'x'Marion' (KM), containing 137 and 139 individual lines, respectively. By having a common parent these populations provide biological replication of the results in that significant genomic regions should be evident in analyses of multiple cross combinations. The KO population was mapped with 150 RFLP loci distributed over the genome and was grown in five diverse environments (locations and years) for measurement of groat oil content. The KM population was mapped with 60 RFLP loci and grown in three environments. The QTL linked to AccaseA on linkage group 11 accounted for up to 48% of the phenotypic variance for groat oil content. These results provide strong support for the hypothesis that ACCase has a major role in determining groat oil content. Other QTLs were identified in both populations which accounted for an additional 10-20% of the phenotypic variance.
External Databases
https://doi.org/10.1007/s001220051147
Gene
ACCase (Avena)
Locus
Coleoptal
Map Data
Oat-1999-KxM-Oil
Oat-1999-KxO-Oil
Probe
oat-91
ACCase
QTL
QOil.KxM-Oil_3
[ Show all 8 ]
Keyword
acetyl-coa carboxylase
oat
oil content