半番鸭白色羽毛遗传的研究

A Study on Hereditary Mechanism of White-feather in Mule Ducks

从正交、反交和轮交的结果，揭示产生半番鸭白羽起主导作用是家鸭；不同基因型家鸭产生白羽半番频率是不同的，含有白羽肉鸭血统家鸭所产生的半番鸭的白羽率高于蛋用型品种，肉鸭血统愈高其Ｆ１的白色羽率也愈高；同一品种母家鸭个体间产生白羽半番鸭亦不同，生产白羽率高的个体，交换公番鸭交配后，其Ｆ１仍然是高的，可以选用这种个体纯繁，建立生产白羽半番鸭的专门化品系。

The present paper dealt with the hereditary mechanism of white-feather in mule ducks.The result showed that the domestic ducks played a dominant function to produce white feather in mule ducks using the testing methods of reciprocal and rotation crossbreeding.The frequency of white feather from different genotype of female domestic ducks was variable, of which the domes-tic ducks with the meat-duck kin was higher than that with the egg-laying ducks.The more the meat-duck kin,the higher the frequency of white-feather in F1. A significant difference of white-feather also existed in the F1,of which the generation was characterized with high frequency of white-feather,among intraspecific individuals of the domestic duck.The pure selection from the in-dividuals can be done to construct a special line for producing white-feather mule duck.