In order to elucidate the development of embryonic characteristics of giant embryo rice TgeB （ Oryza sativa L. ） and its .wide type TB, the whole development of embryonic characteristics of giant embryo and wide type were anatomical observed and studied. The main results were as follows： （1）The greatest growing speed of embryo of ge-rice appeared during the 6th to 9th day after flowering, and the growing speed of ge-rice was higher than that of the wild type. （2）The embryo size of ge-rice was larger than that of CK at all stages, the embryo length and the embryo thicker of ge-rice were 1.21 - 1.37 times and 1.37 1.70 times than those of CK respectively; the embryo shoot width of ge-rice were 1.12 - 1.31 times than that of CK. But there was no significant differences in embryo shoot length between ge-rice and CK at all stages; The embryo radicle length of ge-rice were 1.14 - 1.22 times higher than that of CK, and the radicle width of ge-rice and CK were almost the same at most developing stages. （3）The sizes of scutellum of ge-rice were larger than CK at all stages, and the cell＇s length and width of scutellum of ge-rice were about 2.09 times and 1.90 times than those of CK, respectively. （4）The number of cells in embryo of ge-rice was almost no difference compared to that of wide type embryo. The enlargement of embryo of giant embryo rice is exclusive due to the enlargement of scutellum cells.
Acta Agriculturae Nucleatae Sinica
giant embryo rice