Genetic, Breeding and Reproduction Studies on Teleost

这项与韩国科学家在鱼类遗传、繁殖和繁殖领域进行的国际合作研究工作的主要目的是在同一领域建立日本和韩国之间牢固的个人联系。我们不了解韩国鱼类遗传、育种和繁殖研究的现状。起初，我们计划交换有关鱼类遗传和繁殖的想法和信息，并在学校举行了研讨会。大学和韩国海洋研究院。对染色体操作技术在水产养殖中的有益应用及存在的问题进行了探讨，取得了丰硕的成果。三倍体雌鱼很有用，因为它们都是不育的，整个产卵季节都在生长。但三倍体雄性是可生育的，有可能参与自然产卵。这可能在自然种群中造成一些遗传污染，因为当三倍体雄性与正常雌性交配时，会产生异常的胚胎发生。问题是，操纵气体诱导染色体改变的可能性很大。受精后产生的电融合卵为鱼类嵌合体的形成开辟了新的研究领域。这样的研究领域在国内尚属首次。冷冻保存的精子在未来的水产养殖中具有重要的育种意义。该技术可用于日本比目鱼的养殖。在韩国，济州岛和釜山附近海域的比目鱼养殖业正在蓬勃发展。日本比目鱼的性别控制也是釜山国立水产大学的课题。由于雌性比目鱼的生长速度快于雄性，在日本已经建立了对日本比目鱼的性别控制和操纵，在这种养殖中保留所有的雌性种群将获得经济效益。成熟时肝脏中卵黄原蛋白的产生在E分泌的控制下是常见的。但本研究得到了有趣的结果，即卵黄原蛋白的产生不仅受GTH的控制，还受E的控制。这一结果是通过体外肝细胞培养得到的。日本和韩国在鱼类遗传和繁殖方面的研究水平相差很大。朴建国大学教授提议继续进行鱼类遗传、繁殖、繁殖方面的合作研究。我们正在以目前研究中信息交流和研究工作取得的丰硕成果为基础，规划日本和韩国之间未来的合作工作。少

The main purposes of this international cooperative research works with korean scientists in the fields of genetics, breeding and reproduction in fishes are to establish strong personal connection between Japan and Korea in the same field. We did not know about the present situations in the research of fish genetics, breeding and reproduction in korea. We first planned to exchange idea and information on the fish genetics and reproduction and had seminars at kon-kuk. University and Korea Ocean Research & Development Institute. The discussion on the chromosome manipulation on the basis of profitable use of the techniques and the problems in the aquaculture was fruitful.The triploid females are useful because they are all infertile and grow through the spawning season. But triploid males are fertile and have possibility to be involved in the natural spawning. This may cause some genetic pollution in the natural population because the triploid males produce abnormal embryogenesis when the … More y mate with normal females. The problem is that the manipulation gas strong possibility to induce chromosomal changes. The Electrically fused-eggs caused just after fertilization make new research field of chimera formation in fishes. Such research field is new in Korea. The cryopreserved sperms may be useful in the future aquaculture in a sence of fish breeding. This technique may be applied to the breeding of Japanese flounder. In Korea, mariculture of Japanese flounder is now prosperous in cheju-Do and in the coastal waters around pusan. the sex control of the japanese flounder was also topic at National Fisheries University of Pusan. Sex control and manipulation in Japanese Flounder is already established in Japan, because the growth of females is more rapid than males and economical benefit will be obtained by keeping all female population in this aquaculture. Vitellogenin production in the liver at maturation is common under the control of E secretion in fish. But interesting results were obtained in the present research that the Vitellogenin production was also under the control of GTH as well as E in eels. This result was obtained from the liver cell culture in Vitro. The research levels between Japan and Korea in the fields of fish genetics and reproduction are quite different. The proposal from Professor Park Kon-kuk University to continue cooperative research works on the fish genetics, breeding and reproduction was made. We are planning future cooperative works between Japan and Korea on the basis of the Fruitful results of the exchange of the information and research works in the present studies. Less