Silversides F G, Crawford R D
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Canada.
Poult Sci. 1991 Jan;70(1):6-12. doi: 10.3382/ps.0700006.
Four trials compared growth, feed efficiency, and mortality of albino (sal-s) and nonalbino chickens under conditions approximating those used commercially for broilers. Early body weight reductions of albino chicks were substantial, but by a normal market age for broilers in North America, albinos weighed only 3 to 5% less than nonalbinos. The early mortality rate of albinos was elevated. Overall feed efficiency was not affected by the sal-s gene. An increased incidence of lesions of the navel, hocks, and nares was observed, but regression analyses showed them to be relatively unimportant in the determination of body weights. Heritability estimates showed that the lesions would be very difficult to eliminate through selective breeding. It is proposed that the gene could be used to sex either commercial broilers or their dams.
四项试验比较了白化鸡（sal-s）和非白化鸡在接近商业肉鸡养殖条件下的生长、饲料效率和死亡率。白化雏鸡早期体重显著下降，但到北美肉鸡的正常上市年龄时，白化鸡的体重仅比非白化鸡轻3%至5%。白化鸡的早期死亡率有所升高。总体饲料效率不受sal-s基因影响。观察到肚脐、跗关节和鼻孔病变的发生率增加，但回归分析表明，这些病变在体重测定中相对不重要。遗传力估计表明，通过选择性育种很难消除这些病变。有人提出，该基因可用于鉴别商业肉鸡或其母本的性别。
