Substitutional Mapping the Cooked Rice Elongation by Using Chromosome Segment Substitution Lines in Rice
1. Institute of Food Crops, Jiangsu Academy of Agricultural Sciences/ Jiangsu High Quality Rice Research & Development Center/Nanjing Branch of China National Center for Rice Improvement, Nanjing 210014, China
2. Institute of Rice, Fujian Academy of Agricultural Sciences, Fuzhou 350019, Fujian, China
Molecular Plant Breeding, 2013, Vol. 4, No. 13 doi: 10.5376/mpb.2013.04.0013
Received: 23 Feb., 2013 Accepted: 04 Mar., 2013 Published: 31 Mar., 2013
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Preferred citation for this article:
Yang et al., 2013, Substitutional Mapping the Cooked Rice Elongation by Using Chromosome Segment Substitution Lines in Rice, Molecular Plant Breeding, Vol.4, No.13 107-115 (doi: 10.5376/mpb.2013.04.0013)
The elongation of the cooked grain is very important trait in determining the quality of cooked rice grain. In this study, 103 chromosome segment substitution lines (CSSLs) derived from 93-11/Nipponbare, an elite variety 93-11 as the recurrent parent, were used to identify quantitative trait locus (QTL) controlling milled rice length (MRL), cooked rice length (CRL), and cooked rice elongation (CRE). In total, 12 QTLs for rice elongation traits were detected on chromosomes 3, 4, 6, 8, 9, 10, and 11, among which two QTLs for MRL were located on chromosome 3, one QTL for MRL on chromosome 8, four QTLs for CRL on chromosome 3, 6, 8, and 9, and five QTLs for CRE on chromosome 4, 6, 9, 10, and 11. The additive effect of the QTL related to rice elongation ranged from -5.80 to -0.14, and the additive effect percentage of the QTL ranged from -12.26% to -1.72%. Furthermore, eight QTLs were mapped in interval less than 10.0 cM. Particularly, the qCRE-6 located in the region close to the Wx gene might be important for CRE trait, which might be primarily mapped by using CSSLS as well as could be applied in rice quality improvement based on approaches of marker-assisted selection (MAS).
Rice (Oryza sativa L.); Chromosome segment substitution lines (CSSLs); Substitutional mapping; Cooked rice elongation; Quantitative trait locus (QTL)