Reproductive performance of male and female phenotypes in three sex chromosomal genotypes(XX, XY, YY) in the killifish, Oryzias latipes.
Reproductive performance of male and female phenotypes in three sex chromosomal genotypes(XX, XY, YY) in the killifish, Oryzias latipes.
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鳉鱼三种性染色体基因型（XX、XY、YY）的雄性和雌性表型的生殖性能。
DOI：
10.1002/jez.1401920308
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
Gary A. Chase
中科院分区：
文献类型：
--
作者：
R. Fineman;J. Hamilton;Gary A. Chase
本研究探讨了日本青鳉幼鱼和成鱼的繁殖性能，这是成功的性别逆转，通过喂养雄性或雌性性激素在鱼苗阶段。这些实验室生长的鱼的三个已知的基因型（XX，SY，YY）的性成熟发生最早的未处理的基因型，其次在基因型处理的雄性激素（甲基睾酮）和雌性激素（雌酮），分别。早期外源性性激素治疗引起的性成熟延迟可能是神经-性腺轴的紊乱。然而，反应的程度也受到动物性染色体基因型的强烈影响。XX鱼通常是表型雌性，受雄性激素的影响大于受雌性激素的影响。XY和YY鱼，通常表现为男性，延迟更多的雌性激素比雄性激素。这种特定的性别差异-性别基因型相互作用也影响成年生殖能力（精子或卵子产生）。XX、XY和YY鱼的雄性和雌性性激素代谢的差异可能是这些有趣发现的原因。
The present study investigates the juvenile and adult reproductive performance of Japanese killifish, Oryzias latipes, which were successfully sex-reversed by feeding them male or female sex hormones during the fry stage. Sexual maturation of these laboratory grown fish of three known genotypes (XX, SY, YY) occurred earliest in untreated genotypes, next in genotypes treated with male hormone (methyl testosterone) and female hormone (estrone), respectively. The delay in sexual maturation caused by early exogenous, sex-hormone treatment may represent a disturbance in the delicate neural-gonadal axis. However, the degree of response was also strongly influenced by the animal's sex chromosomal genotype. XX fish, normally phenotypic females, were affected more by the male hormone than by the female hormone. XY and YY fish, normally phenotypic males, were delayed more by the female hormone than by the male hormone. This specific sex hormone-sex genotype interaction also influenced adult reproductive performance (sperm or egg production). Differences in the metabolism of male and female sex hormones by the XX, XY, and YY fish are probably responsible for these interesting findings.