Otherwise, autoteraploid rices had much higher heterosis than that of diploid hybrids in the character of filled spikelets per panicle, spikelets per panicle and seed setting rate.

• 此外，杂种在四倍体水平与二倍体水平比较，在每穗实粒数、每穗总粒数和结实率等主要产量性状上，具有明显的杂种优势；