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KMID : 0613820080180121665
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Journal of Life Science
2008 Volume.18 No. 12 p.1665 ~ p.1670
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Analysis of Quantitative Trait Loci (QTLs) for Unsaturated Fatty Acid Contents in Soybean Seed Using Recombinant Inbred Lines
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Kim Hyun-Kyung
Im Moo-Hyeog
Choung Myoung-Gun
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Abstract
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Soybean oil is an important source of vegetable oil for human food and nonfood applications and accounts for approximately 22% of the world’s total edible oil production. Improvement of the quality and quantity of soybean seed oil constituents is one of the most important objectives in soybean breeding. The objective of this study was to identify quantitative trait loci (QTLs) that control oleic, linoleic, and linolenic acid contents in soybean. The 117 F2:10 recombinant inbred lines (RIL) developed from a cross of ’Keunolkong’ and ’Shinpaldalkong’ were used. Narrow-sense heritability estimates based on a plot mean on seed weight, protein and oil content were 0.85, 0.82 and 0.81, respectively. Eight independent QTLs for oleic acid content were identified from linkage group (LG) A2, C1, D2, F, G, L, and O. Seven QTLs for linoleic acid content were located on LG D1b, E, H, I and L. Oil content was related with five QTLs located on LG C1, H, J, K, and L. Oleic, linoleic, and linolenic acid have two common QTLs on LG C1 and L. Thus, we identified major loci improving soybean oil quality.
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KEYWORD
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Soybean, unsaturated fatty acid, QTL, SSR marker
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