摘要
从1979年开始，用了约15年时间，采用杂交和雌核发育技术相结合的方法，成功地将黑龙江野鲤的耐低温、荷包红鲤耐高密度养殖和镜鲤生长快等优良性状综合到三杂交种中，建立了Ⅰ、Ⅱ两个选育系，再用它们与野鲤和镜鲤回交，从6个回交种中选出2个与Ⅰ、Ⅱ两个雌核发育系组合成合成系并系统选育到F7，育成了抗寒力达97．6％（H1IF6），生长速度比当地养殖鲤快近一倍的高寒鲤。研究中发现黑龙江野鲤的抗寒因子可以转移给杂种，并稳定地遗传给后代；与野鲤回交可同时加强抗寒能力和提高生长速度，以及采用雌核发育技术与常规结合，可加速选育速度。
It took us 15 years to study this project from 1979 to 1995. Techniques of gynogenesis and hybridization were used. Heilongjiang wild carp which has high frigid resistance,Hebao red carp which can be intensive cultured and Mirror carp which grows fast were triple hybridized. Two selective lines Line Ⅰ and Line Ⅱ were set up. The back hybrids were crossed with wild carp.The two of the six back hybrids combined a synthetic Line with gynogenetic Line Ⅰ anu Line Ⅱ and were bred to F7. The heritabiity of frigid resistance is of F7 above 95% and growth rate is one time faster than that of native carp. We found that frigid resistant factor of Heilongjiang wild carp can be transferred to the hgbrid and be inherited by selective progeny stably. Hybrid back crossed with wild carp could strengthen frigid resistance and improve growth rate. Gynogenesis combined with normal breeding method could accelerate selective breeding speed.
出处
《水产学报》
CAS
CSCD
北大核心
1997年第4期391-397,共7页
Journal of Fisheries of China
关键词
耐寒性
杂交育种
鲤鱼
Carp, Cold tolerance, Cross breeding
