黑鲷与灰鳍鲷杂交育种

HYBRIDIZATION BREEDING BETWEEN SPARUS MACROCEPHALUS AND SPARUS BERDA

黑鲷属于鲷科鲷属,广泛分布于我国沿海。灰鳍鲷同属于鲷科鲷属,在我国仅分布于南海。黑鲷与灰鳍鲷杂交属于种间杂交。本研究利用冬季繁殖的黑鲷种群与灰鳍鲷种群进行交配。用HCG与LHRH-A_2催产,网箱内自然受精。正交以黑鲷为,灰鳍鲷为;反交以黑鲷为,灰鳍鲷为。两种杂交组合的雌雄比均为1∶1.5。正交组合的受精率为83％,反交组合为86％,正交组合的孵化率为91％,反交为89％。该研究证明海水鱼种间杂交可以成功,并为海水鱼杂交育种推广应用奠定了基础。

Sparus macrocephalus and Sparus berda belong to genus Sparus in family Sparide. Sparus macrocephalus distributes all over the China sea while Sparus berda is found only in the South China Sea. The population of Sparus macrocephalus breeding in autumn - winter and Sparus berda breeding in winter were used in this research. HCG and LHRH-A2 were used to the two broodstooks and natural fertilization was completed in marine cage. Direct cross combination is Sparus macrocephalus (?)×Sparus berda↑, while reciprocal cross combination is Sparus berda (?)× Sparus macrocephalus ↑. The female and male of sex ratio is 1:1.5 in the two combinations. The fertilizing rates of the direct cross combination and the reciprocal cross combination were 83% and 86% , respectively. The hatching rates of the direct and reciprocal cross combination were 91 % and 89% , respectively. The study proves that interspecific hybridization can be success and makes a foundation for the popularization and application to the cross breeding of marine fishes.