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Fig. 2. Most likely positions of quantitative trait loci (QTL) conditioning Si contents in rice detected in Zhenshan 97B/Milyang 46 recombinant inbred line population. The blank bars indicate chromosomes, and the solid portions indicate approximate positions of the centromeres according to Temnykh et al. (2000). For each chromosome, loci showing significant additive effects and additive-by-additive epistatic effects are shown on the left-hand and right-hand sides, respectively. Epistatic loci involved in a same interaction are indicated by the same number. FLS, silicon in the flag leaf; HUS, silicon in the hull; STS, silicon in the stem.