Plant Biotechnology Reports

, Volume 4, Issue 1, pp 61–73 | Cite as

Identification of quantitative trait loci for physical and chemical properties of rice grain

  • Yong-Gu Cho
  • Hyeon-Jung Kang
  • Young-Tae Lee
  • Seung-Keun Jong
  • Moo-Young Eun
  • Susan R. McCouch
Original Article


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.


Physical property Chemical property Rice grain 



Quantitative trait locus/loci


Composite interval mapping



We thank Lois Swales for help with formatting. We acknowledge financial support from the Rural Development Administration, Technology Development Program for Agriculture and Forestry, Ministry of Food, Agriculture, Forestry, and Fisheries, Republic of Korea (306005-04-2-HD110), the Rockefeller Foundation’s Biotechnology Career Fellowship (RF95001, No. 342) for Y.-G. Cho’s work at Cornell and the U.S. National Science Foundation’s Plant Genome Research Program Awards 0110004 and 0606461.


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Copyright information

© Korean Society for Plant Biotechnology and Springer 2010

Authors and Affiliations

  • Yong-Gu Cho
    • 1
    • 5
  • Hyeon-Jung Kang
    • 3
  • Young-Tae Lee
    • 3
  • Seung-Keun Jong
    • 2
  • Moo-Young Eun
    • 1
  • Susan R. McCouch
    • 4
  1. 1.National Institute of Agricultural BiotechnologySuwonKorea
  2. 2.Department of Crop ScienceChungbuk National UniversityChongjuKorea
  3. 3.Honam Agricultural Research InstituteIksanKorea
  4. 4.Department of Plant Breeding and GeneticsCornell UniversityIthacaUSA
  5. 5.Department of Crop ScienceChungbuk National UniversityChongjuKorea

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