奥利亚罗非鱼(♀)、鳜(♂)及其子代间遗传关系的研究

Mature eggs of Oreochromis aurea were obtained with artificial reproduction technology, and the hybrids were acquired with Siniperca chuatsi (♂) using artificial insemination . Genomic DNA of O. aurea (♀), S. chuatsi (♂) and their progeny were examined using RAPD method. Only 2 primers (S336, OPZ06) of screened 11 random primers could be amplified into two specifically RAPD bands on progeny which were the same as those of S. chuatsi (♂) and did not exist in O. aurea (♀), and other amplified bands on progeny were all from O. aurea (♀). Genetic similarity index was 0.858 between the progeny and O. aurea (♀), while that was (0.049) between the progeny and S. chuatsi (♂). This indicated that the genetic substance of progeny was mostly from O. aurea (♀). The primary function of sperm from S. chuatsi (♂) was stimulating development of eggs from O. aurea (♀), at the same time little genetic substance of S.chuatsi(♂) appeared in the progeny, which laid the foundation for breeding of fine varieties having characters of O. aurea (♀) and S. chuatsi (♂).