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Mol. Cells 2011; 31(5): 437-445

Published online May 31, 2011

https://doi.org/10.1007/s10059-011-0289-y

© The Korean Society for Molecular and Cellular Biology

Identification of Quantitative Trait Loci Associ-ated with Rice Eating Quality Traits Using a Population of Recombinant Inbred Lines Derived from a Cross between Two Temperate aponica Cultivars

Soon-Wook Kwon, Young-Chan Cho*, Jeong-Heui Lee, Jung-Pil Suh, Jeong-Ju Kim, Myeong-Ki Kim, Im-Soo Choi, Hung-Goo Hwang, Hee-Jong Koh1,*, and Yeon-Gyu Kim

National Institute of Crop Science, Rural Development Administration (RDA), Suwon 441-857, Korea, 1Department of Plant Science, Seoul National University, Seoul 151-921, Korea

Correspondence to : *Correspondence: yccho@korea.kr (YCC); heejkoh@snu.ac.kr (HJK)

Received: November 17, 2011; Revised: January 29, 2011; Accepted: February 7, 2011

Abstract

Improved eating quality is a major breeding target in japonica rice due to market demand. In this study, we performed genetic analysis to identify quantitative trait loci (QTLs) that control rice eating quality traits using 192 recombinant inbred lines (RILs) derived from a cross between two japonica cultivars, 'Suweon365' and 'Chu-cheongbyeo'. We evaluated the stickiness (ST) and overall evaluation (OE) of cooked rice using a sensory test, the glossiness of cooked rice (GCR) using a Toyo-taste meter, and measured the amylose content (AC), protein content (PC), alkali digestion value (ADV), and days to heading (DH) of the RILs in the years 2006 and 2007. Our analysis revealed 21 QTLs on chromosomes 1, 4, 6, 7, 8, and 11. QTLs on chromosomes 6, 7, and 8 were detected for three traits related to eating quality in both years. QTLs for ST and OE were identified by a sensory test in the same region of the QTLs for AC, PC, ADV, GCR and DH on chromosome 8. QTL effects on the GCR were verified using QTL-NILs (near-isogenic lines) of BC3F4-6 in the Suweon365 background, a low eating quality variety, and some BC1F3 lines. Chucheongbyeo alleles at QTLs on chromosomes 7 and 8 increased the GCR in the NILs and backcrossed lines. The QTLs identified by our analysis will be applicable to future marker-assisted selection (MAS) strategies for improving the eating quality of japonica rice.

Keywords eating quality, japonica, MAS, QTL, rice

Article

Research Article

Mol. Cells 2011; 31(5): 437-445

Published online May 31, 2011 https://doi.org/10.1007/s10059-011-0289-y

Copyright © The Korean Society for Molecular and Cellular Biology.

Identification of Quantitative Trait Loci Associ-ated with Rice Eating Quality Traits Using a Population of Recombinant Inbred Lines Derived from a Cross between Two Temperate aponica Cultivars

Soon-Wook Kwon, Young-Chan Cho*, Jeong-Heui Lee, Jung-Pil Suh, Jeong-Ju Kim, Myeong-Ki Kim, Im-Soo Choi, Hung-Goo Hwang, Hee-Jong Koh1,*, and Yeon-Gyu Kim

National Institute of Crop Science, Rural Development Administration (RDA), Suwon 441-857, Korea, 1Department of Plant Science, Seoul National University, Seoul 151-921, Korea

Correspondence to:*Correspondence: yccho@korea.kr (YCC); heejkoh@snu.ac.kr (HJK)

Received: November 17, 2011; Revised: January 29, 2011; Accepted: February 7, 2011

Abstract

Improved eating quality is a major breeding target in japonica rice due to market demand. In this study, we performed genetic analysis to identify quantitative trait loci (QTLs) that control rice eating quality traits using 192 recombinant inbred lines (RILs) derived from a cross between two japonica cultivars, 'Suweon365' and 'Chu-cheongbyeo'. We evaluated the stickiness (ST) and overall evaluation (OE) of cooked rice using a sensory test, the glossiness of cooked rice (GCR) using a Toyo-taste meter, and measured the amylose content (AC), protein content (PC), alkali digestion value (ADV), and days to heading (DH) of the RILs in the years 2006 and 2007. Our analysis revealed 21 QTLs on chromosomes 1, 4, 6, 7, 8, and 11. QTLs on chromosomes 6, 7, and 8 were detected for three traits related to eating quality in both years. QTLs for ST and OE were identified by a sensory test in the same region of the QTLs for AC, PC, ADV, GCR and DH on chromosome 8. QTL effects on the GCR were verified using QTL-NILs (near-isogenic lines) of BC3F4-6 in the Suweon365 background, a low eating quality variety, and some BC1F3 lines. Chucheongbyeo alleles at QTLs on chromosomes 7 and 8 increased the GCR in the NILs and backcrossed lines. The QTLs identified by our analysis will be applicable to future marker-assisted selection (MAS) strategies for improving the eating quality of japonica rice.

Keywords: eating quality, japonica, MAS, QTL, rice

Mol. Cells
May 31, 2022 Vol.45 No.5, pp. 273~352
COVER PICTURE
Fe2+ ion depletion-induced expression of BΔGFP at the early stage of leaf development (Choi et al., pp. 294-305).

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