Gonadal sex differentiation in the medaka, Oryzias latipes, with special regard to the gradient of the differentiation of testes.
Gonadal sex differentiation in the medaka, Oryzias latipes, with special regard to the gradient of the differentiation of testes.
复制标题
青鳉、Oryzias latipes 的性腺性别分化，特别关注睾丸分化的梯度。
DOI：
10.2331/suisan.45.1115
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发表时间：
1979
影响因子：
0.4
通讯作者：
M. Oguri
中科院分区：
文献类型：
--
作者：
H. Yoshikawa;M. Oguri
这份报告涉及青鳉（Oryzias latipes）发育中睾丸的性别分化梯度以及生殖细胞和体细胞之间的相互作用。作为睾丸体细胞成分分化标准的间质细胞在9.0mm阶段首次检测到，而作为生精成分分化标准的减数分裂中的生殖细胞则在11.5mm阶段首次检测到。山本认为，青鳉的性别分化存在前后梯度。然而，在目前的研究中，这种梯度是无法识别的。目前的研究表明，间质细胞总是在减数分裂中可观察到生殖细胞的部分附近发现，并且体细胞向间质细胞的分化发生在精原细胞向精母细胞分化的早期阶段。因此，间质细胞似乎诱导精原细胞向精母细胞的转变。
This report deals with the gradient of sex differentiation and the interaction between the germ cells and the somatic cells of the developing testes in the medaka, Oryzias latipes. Interstitial cell, used as a criterion for the differentiation of somatic elements of testes, was detected for the first time at 9.0mm stage, while germ cell in meiosis, used as a criterion for germinal elements, was at 11.5mm stage. According to YAMAMOTO, there was an antero-posterior gradient in the sex differentiation of the medaka. In the present investigation, however, such a gradient was not recognizable. The present investigation revealed that interstitial cell was always found at the very vicinity of the parts where the germ cell in meiosis was observable and that the differentiation of somatic cells into interstitial cells occurred at the stage earlier than that of spermatogonia into spermatocytes. Accordingly, it seems that interstitial cells induce the transformation from spermatogonia to spermatocytes.