摘要
对无融合生殖水稻材料ＨＤＡＲ００２六个株系的胚胎学研究结果表明，６个株系无融合生殖胚的发生具有多源性，未受精胚囊内胚的发生有两种方式：即卵细胞的孤雌生殖和助细胞的无配子生殖；此外珠心细胞可直接分裂形成不定胚。无融合生殖胚的启动分裂时期为开花前２～３ｄ，其胚胎发育过程基本同正常水稻，部分材料的胚在形态上与正常水稻有差异。同时还观察到ＨＤＡＲ００２胚胎发育中的多极核现象与无胚乳现象。
Embryological investigation on 6 strains of HDAR002 showed that apomictic embryos originated either from egg cell or synergid in unfertilized embryo sac or from nucellar cells. The apomictic proembryos occurred in some embryo sacs 2～3days before anthesis and then underwent a development course similar to that of the normal zygotic embryos. Abnormalities were observed in HDAR002 including morphology of differentiated embryos, formation of seeds without endosperm and three polar nuclei in one embryo sac.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1994年第4期339-343,T002,共6页
Journal of Huazhong Agricultural University
基金
国家863高技术项目
关键词
水稻
无融合生殖
孤雌生殖
胚胎学
rice
apomixis
parthenogenesis
apogamy
adventitious embryo
