人工三倍体水晶彩鲫的性腺发育  

GONADAL DEVELOPMENT IN ARTIFICIAL TRIPLOID TRANSPARENT COLORED CRUCIAN CARP

作　　者：桂建芳[1] 肖武汉 陈丽 梁绍昌[1] 蒋一珪[1] 

机构地区：[1]中国科学院水生生物研究所 [2]武汉大学生物学系

出　　处：《动物学报》1991年第3期297-304,共8页ACTA ZOOLOGICA SINICA

基　　金：中国科学院青年科学基金(862001);中国科学院院长基金

摘　　要：雄性三倍体鱼的精巢发育比较一致,都完成了由精原细胞、初级精母细胞经减数分裂形成精子细胞的过程,有些还见有变态中的异形精子,个别的还观察到少量类似于正常的成熟精子。雌性三倍体鱼的卵巢发育相当复杂,分化多样,已辨别出卵巢发育分别停留在卵原细胞分化、初级卵母细胞形成、少量卵母细胞生长发育和较多卵母细胞生长发育的四种异常类型,其共同特点是都含有一些败育和趋于败育的细胞,后两类卵巢中普遍含有类似于三倍体鱼精巢中的组织细胞结构。Some morphological and cytological characteristics about the gonadal development of artificial triploid transparent colored crucian carp (Carassius auratus transparent colored variety) produced from hydrostatic pressure shock were studied by the technique of histological section.Most of the testes of triploid males were almost similar to that of diploid controls both in shape and in size at one year of age, but the color of testes of triploid males was more pink than that of diploid controls, and no milt was stripped out in triploid males. The seminiferous tabules have formed within the testes of all triploid males examined. Spertnatogonia, primary spermatocytes, prophase cells of first meiosis, spermatids and abnormal spermatozoa were observed in most of histological sections. Aborted primary spermatocytes and spermatids were also found in some histological sections. The shape of abnormal spermatozoa varied, such as tadpole-like, stick-like or shuttle-like. A few mature spermatozoa similar to the normal spermatozoa of diploid fish were also observed within testicular tissue of one triploid male in which the testis is obviously abnormal.Significant differences and development diversification of ovaries were found among triploid females. Four types of anomalous ovaries were distinguished among the female triploid individuals examined. Some individuals had only thin string-like ovaries enclosed by large white fat bodies. The bulk of the thin string-like ovarian tissue was composed of many small undifferentiated cells, diferentiating cells and some oogonia. A small number of primary oo-cytes were also present, Some aborted cells without nucleus aborting cells were observed in the ovaries. Some individuals had still string-like ovaries but thickened slightly. The ovarian tissues had differentiated and contained enlarging primary oocytes. The aborted cells were often seen in the second type of ovaries. The tissues of the third type of ovaries had strongly differentiated. The ovaries contained a few growing and develop

关 键 词：三倍体鱼 水晶彩鲫 性腺 

分 类 号：Q959.468[生物学—动物学]