This paper studies the embryonic development of Spodoptera exigua ( H ü bner) including the cleavage, the formation of blastoderm and germ band, and the differentiation of germinal layers. 本文详细研究了甜菜夜蛾Spodopteraexigua(H櫣bner)胚胎发育的卵裂、胚盘、胚带的形成和胚层分化。
Chicken embryonic stem cells were pluripotent stem cell which derived from stage blastoderm cells or PGCs isolated from genital ridge by long-time restraining differentiation in vitro. 鸡胚胎干细胞是一种多能性干细胞,从Ⅹ期胚盘分离胚盘细胞或早期鸡胚的生殖嵴分离原始生殖细胞,经体外长期抑制分化培养可得到鸡胚胎干细胞。