This study was conducted to compare super hybrid varieties with inbred varieties. Three varieties from each varietal group were grown under three sowing dates in Changsha, Hunan Province, China in 2010. Grain yield and some-yield-attributes such as tillering process, panicle traits and biomass production were measured for each variety. Averaged across three sowing dates, grain yield of super hybrid varieties was 26% higher than that of inbred varieties. The high grain yield of super hybrid varieties was attributed to improvement in both sink and source. Super hybrid varieties had large panicle...
