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
The growth and fecundity of Siniperca chuatsi and Siniperca kneri are investigated.The results show that Siniperca chuatsi grows faster than Siniperca kneri.There are curve regression relationships between the body we...The growth and fecundity of Siniperca chuatsi and Siniperca kneri are investigated.The results show that Siniperca chuatsi grows faster than Siniperca kneri.There are curve regression relationships between the body weight(m) and standard length(L) with relational expressions as follow: m=0 081 L 2.71 and m= 0 076 55 L 2.59. Siniperca chuatsi’s fecundity is bigger than that of Siniperca kneri. Siniperca chuatsi and Sniperca kneri attain maturity at two-winter-age and three-winter-age respectively.In addition,the growth equation,the growth speed and growth acceleration equation of body length and body weight are also studied.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The growth and fecundity of Siniperca chuatsi and Siniperca kneri are investigated.The results show that Siniperca chuatsi grows faster than Siniperca kneri.There are curve regression relationships between the body weight(m) and standard length(L) with relational expressions as follow: m=0 081 L 2.71 and m= 0 076 55 L 2.59. Siniperca chuatsi’s fecundity is bigger than that of Siniperca kneri. Siniperca chuatsi and Sniperca kneri attain maturity at two-winter-age and three-winter-age respectively.In addition,the growth equation,the growth speed and growth acceleration equation of body length and body weight are also studied.
