Studies on the Anther Dehiscence in FF1 of Hybrids between Taichung 65 and Its F1 Pollen Sterility Near Isogenic Lines Structure and Fertilization of Embryo Sac in Intersubspecific Hybrids of Autotetraploid Rice Effects of Transplanting Density and Nitrogen Fertilizer on Yield Formation and N Absorption in a Two-line Intersubspecific Hybrid Rice “Liangyoupeijiu” Genome Analysis of Gene Loci Related to Sterility of Two Inter-subspecific Hybrids betwen Indica and Japonica Rice(Oryza sativa L.) Correlation of intersubspecific hybrid rice spikelet fertilization rate with temperature and related statistic model Practice and Thinking on Rice Breeding for High Yield