由于我们养殖的冷水鱼亲本全部来自国外引进的品种,在选择异源精子时,可供选择的品种不多,很难找到合适的异源精子,因此,我们采用将染色体失活后的同源精子作为配子,由于卵子缺乏决定性别的雄性染色体结合,子代所体现的性别特征全部是XX型(雌性),所表现的生长特性全部为雌性。 Since all of our breeding cold-water fish are all imported from foreign countries, there are not many species to choose from when selecting heterologous sperm, so it is very hard to find suitable heterologous sperm. Therefore, we used the homologous As a gamete, sperm play a role as sex XX genotypes (females) because of the absence of an ovum that determines sex-specific male chromosome binding. All of the growth characteristics exhibited by females are female.