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从1979年至1988年,为培育适合于北方地区养殖的鲤鱼新品种,我所选用遗传差异大的黑龙江野鲤和荷包红鲤进行了正反杂交(单交)。结果两个亲本具有很强的配合力,正反交F_1都有明显的生长优势,优势率在15-30%;反交组F_1的抗寒、抗病力很强,并完成了单组的选型。由于原种荷包红鲤在,黑龙江不能过冬,越冬成活率为零,为保证新品种的培育,根据杂支分离的遗传学原理,从上述组合F_2中筛选出一个越冬成活率已达70%以上、基因型与原种相似的抗寒品系。1985年至1988年,又用上述单交F_1与散鳞镜鲤进行正反三杂交,通过池塘生长对照,抗寒力试验,结果正反三杂交F_1的生长相似,比单交F1更具生长优势,优势率在30~50%之间,成活率、抗寒、抗病力都提高5%以上。并已进行了推广应用。
From 1979 to 1988, in order to breed new species of common carp suitable for farmed in northern China, we selected the Heilongjiang wild carp and the purse-type red carp with large genetic differences for the reciprocal hybridization (single cross). The results showed that the two parents had strong combining ability, the reciprocal cross F_1 had obvious growth advantage, and the dominant rate was 15-30%. The anti-cold and disease resistance of F 1 was very high, and the single group Selection. Because the original species purse red carp in Heilongjiang can not be winter, winter survival rate is zero, in order to ensure the cultivation of new varieties, according to the principle of miscellaneous branch of the genetic separation, from the above combination F_2 screening a overwintering survival rate has reached 70% , Similar to the original genotype and cold-resistant strains. 1985 to 1988, with the above single cross F_1 and Scattered mirror carp crossbreed, through the pond growth control, cold hardiness test, the results of cross-F13 hybrid growth, growth more than single cross F1 Advantages, the dominant rate of 30 to 50%, survival rate, cold, disease resistance increased by 5%. And has been promoted.