The development rate of autotetraploid is lower than that of diploid, and all so the developing rate of embryo and endoperm dfffer greatly in vari-ous embryosac.

• 四倍体高粱在受精后胚胎发育的进程上均较其二倍体母体滞后，而且四倍体胚胎的发育在进度上很不整齐。