摘要
试验表明,半罗、半考横交后代的主要经济性状在相似的环境条件下,因品种而异。其中半考横交后代在环境条件较差的情况下,适应性和主要经济性状较好。提示在杂交育种过程中,除考虑品种遗传因素外,亦应考虑生态环境。通过变异系数的分析,两种横交后代的分离现象并不严重,说明杂一代横交是完全可行的。据此,应在今后的选育工作中,对理想型个体及时横交固定,非理想个体继续级进或用理想型公羊交配或严加淘汰。
The test showed that the main economic character of offspring crossing half—Romanov with half—Corriedale changed with varieties in similar condition. The adaptability and main economic character of offspring of halr—Corredale crossed with were better in the worse condition. This pointed out that we should consider ecological factor besides genetic factor of variely. Analysis on coefficient of variation showed that the dissociated phenominon of offspring of two crossed breed are not obvions. It's showed that crossing offspring with was perfect possible. From this, reasonable body should be crossed in time and unreasonable should be continually crossed with reasonable or eliminated。
关键词
半细毛羊
罗姆尼羊
考力代羊
杂交
Economic character
adaptability
ecological factor
