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. chuats...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 (♂).展开更多
By using RAPD technique,testes genomic DNA from T.aurea and T.nilotica were analysed.With 20 primers,249 fragments were attained, and the similarity percentage between two species of fish is 89.96%. Species specific f...By using RAPD technique,testes genomic DNA from T.aurea and T.nilotica were analysed.With 20 primers,249 fragments were attained, and the similarity percentage between two species of fish is 89.96%. Species specific fragments were produced respectively by primers OPZ 14 and OPZ 18 between two species of fish.It is suggested that these fragments may be used as molecular markers in fish′s species展开更多
文摘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 (♂).
文摘By using RAPD technique,testes genomic DNA from T.aurea and T.nilotica were analysed.With 20 primers,249 fragments were attained, and the similarity percentage between two species of fish is 89.96%. Species specific fragments were produced respectively by primers OPZ 14 and OPZ 18 between two species of fish.It is suggested that these fragments may be used as molecular markers in fish′s species