【Abstract】 According to the analysis about resistance to agression. competitive effect and synergistic effect of hy brid rice Youza 1 and its female parent Lemont, Youza I showed strong competitive ability over Lemont, resulted severe inhibition of tillering, panicle development of Lemont plants. It was demonstrated that there were no signifi cant differences of grain yields when the range of the hybrid seed purities were from 70% to over 90% because of the compensation function by super competitive capacity of Youza 1.更多还原