【摘要】 为了利用雌、雄鱼之间生长的差异性提高鱼产量,以莫桑比克罗非鱼作材料,对鱼类性别进行了人工控制试验。结果表明:雌性激素(BE₅₀)和雄性激素(ML₃₀)能有效地控制当代鱼类生理上性别的相互转化;同时以生理遗传学的原理,通过遗传上♀×♀、♂×♂的特殊配种和“三系”配套的途径进一步控制了鱼类遗传上的性别,并证明莫桑比克罗非鱼的性别遗传确定为XX♀-XY♂型。更多还原

【Abstract】 The study on sex control in T. mossambica has been carried out since 1976. The preliminary results of our study are briefly described as follows.1. The fish treated with male hormone (MT30) for 82 days at its larva stage developed into 97.0% males. On the other hand, the fish treated with female hormone (BEso) for 228 days developed into 94.9% females, with the result that the two sex hormones can exercise control over physiological sexuality of the fish in both directions.2. On the basis of the above experiment, we further completed the genetic control of monosex females and obtained 98.5% (97.0-100%) daughters by × . Through the approach of mating of × , we have attained 73.4-74.5% sons, indicating the existence of YY males.3. Fish treated with sex hormones had normal reproductive function. The use of sex hormones can not alter genotype of sex, but only phenotype, i.e. physiological type. The genetic determination for sex in T. mossambica is of XX -XY type.4. In order to better guide the production of monosex populations, the genetic and physiological informations on sex control in some fishes were analysed, and the concept of a genetic-physiological type was introduced. The theory of "three line" combination for artifical control of sex in fishes is suggested.更多还原