In this study, a rice population of recombinant
inbred lines (RILs) was used to determine the
genetic characteristics of seed dormancy (SD) at 4
(early), 5 (middle) and 6 (late) weeks after heading
stages. Dynamic analysis showed that the indica IR28
variety tended to have deeper dormancy than the
japonica Daguandao at the middle and late development
stages. The level of SD decreased with the
process of seed development. The significant interaction
between heading date (HD) and SD occurred only
in those seeds collected at the early development
stage. A total of nine additive quantitative trait loci
(QTLs) and eight epistatic QTLs for SD were identified
at three seed development stages. Of them, one
additive and four epistatic QTLs were identified for
the early stage, six additive and one epistatic QTL for