Identification of quantitative trait loci for physical and chemical properties of rice grain |
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| Authors: | Yong-Gu Cho Hyeon-Jung Kang Young-Tae Lee Seung-Keun Jong Moo-Young Eun Susan R McCouch |
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| Institution: | (1) National Institute of Agricultural Biotechnology, Suwon, 441-707, Korea;(2) Department of Crop Science, Chungbuk National University, Chongju, 361-763, Korea;(3) Honam Agricultural Research Institute, Iksan, 570-080, Korea;(4) Department of Plant Breeding and Genetics, Cornell University, 162 Emerson Hall, Ithaca, NY 14853-1901, USA;(5) Present address: Department of Crop Science, Chungbuk National University, Chongju, 361-763, Korea |
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| Abstract: | Quantitative trait loci (QTL) associated with six physical traits of cooked rice and seven chemical properties of rice grain
were identified using a recombinant inbred (RI) population of rice evaluated over 3 years at the National Honam Agricultural
Research Institute in Korea. The RI population consisted of 164 lines derived from a cross between Milyang23 and Gihobyeo,
and the genetic map consisted of 414 molecular markers. A total of 49 QTL were identified for the 13 physico-chemical properties
using composite interval mapping. Of these, 13 QTL were identified for 2 or more years, while 36 were detected in only 1 year.
Five QTL were identified over all 3 years and will be useful for marker-assisted improvement of rice grain quality in Korea.
The two QTL with the highest LOD scores, adhesiveness1.2 and potassium content7.1, provide a valuable starting point for positional cloning of genes underlying these QTL. |
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