摘要
采用铁矾苏木精压片的方法，光镜下观察了三倍体太平洋牡蛎卵细胞第一次减数分裂Ⅰ中期染色体的聚合形态。研究发现，聚合形态在不同细胞、不同个体间变化较大，但大多数聚合体以三价体为主，同时存在着单价体、二价体和超聚合体。由于聚合价态的不同导致细胞内聚合体数目出现较大差异，10～13个的细胞占多数，其他数目的较少，细胞内最高可达18个聚合体。
T he chromosome synapsis configurations in triploid pacific oyster eggs at metaphase Ⅰdur-ing meiosis were observed with acteo -haematoxylin stained under light microscope .Synapsis in eggs from triploid Pacific oyster were highly variable and chaotic ,but most synapsis are trivalent ,and uni-valent ,bivalent and multivalent also occurred .Different synapsis formation contribute to the varia-tions of synapsis number ,most are 10-13 ,the greatest can reached 18 .
