Leaf morphology is an important component of ideal plant architecture in rice. Therefore, identification of genes associated with leaf morphologic traits is helpful to shape rice ideal architecture and reach the aim of super high-yield. A set of chromosome segment substitution lines(CSSLs) derived from Guanglu'ai 4(recipient) and Nipponbare(donor) were employed to detect quantitative trait loci(QTL) for the length and width of top three leaves(flag leaf, the second and third leaf from top). We also examined...