342 Li, Zhang, Wu, Guo, Liu, Wan, Jin, Hanh, Thoa, Chen, Liu, Chen, Liu, Wang, Zhai and Wan Fig. 2. Graphical genotypes of the long arm of chromosome 8 of sub-CSSLs and QTL regions for grain quality detected in previous studies. A: Relative locations of genes controlled AC on the chromosome 8. Putative gene regions for ISA previonsly detected by Fujita et al. (1999). Putative QTL regions for amy-8 and qAC-8 mapped by and Aluko et al. (2004) and Hao et al. (2009). Putative gene cluster for AC and RVA pro- file detected by Wan et al. (2004). The region labelled by dotted line denotes positions of the gene clusters. The relative positions of RFLP mark- ers used in the analyses are shown on the left. The new SSR markers in this study are shown on the right. The genetic distances (cM) between adjacent SSR markers are shown on the left of SSR markers. B: Graphical genotypes of the long arm of chromosome 8 of sub-CSSLs and four identied QTLs in this study. Blocks represent chromosomes. Horizontal lines show the positions of SSR markers investigated. To graphically represent the genotypes of CSSLs, the recombination point was arbitrarily determined at the mid-point between adjacent markers in different geno- type. Black and gray blocks denote homozygous IR24 and heterozygous Asominori alleles, respectively. The physical distance (Kb) of adjacent SSR markers are shown on the left of SSR markers.