The QTLon chromosome 5 was a major locus that explained 87.2% of the variation, and
the other QTL played only a minor role in specifying this trait (Tan et al., 2000). In this case, alleles
from Zhenshan 97 increased the opacity of the grains. Fujita et al. (2007) described a starch
synthase III (SSIIIa) mutant with white-core endosperm, in which the structure and components
of the endosperm starch were profoundly altered. Moreover, Ryoo et al. (2007) found that SSIIIa
causes white-core floury endosperm in rice. Zhou et al. (2009) described qPGWC-7 as the first fine-
mapped gene for white-belly endosperm in rice, which can explain 60.6% of phenotypic variation
in their population. In this study, seven QTLs were used for selecting the targeting genotype. We
succeeded in breeding by design and obtained an inbred line that produces ideal gross agronomic
traits; an inbred line in particular produces high yield and high quality rice. This line has optimum
duration, remarkably effective tillers, ideal grains weight, high yield, beautiful grain shape, good
head rice recovery, acceptable chalkiness, resistance to leaf folder, and preferred taste. RIL10 can
be qualified as the super market variety in China; the taste is almost as good as that preferred by
Chinese consumers, and the appearance is as good as the best indica rice