Abstract:More than one pollen tube entering into one embryo sac was observed after pollinationin Apomixis parent Ⅳ,an indica rice twin seedling line.Zygotes of most embryo sacsdeveloped into normal zygotic embryos,but a few Zygotes developed into cleaved Zygoticembryos through apical cleaving of proembryos and formed seedlings, each of whichwith two plumules and one radicle.In some embryo sacs,synergid cells developed intosynergid embryos after fertilization.In some embryo sacs, without fertilization,antipodalcells directly developed into antipodal embryos.
