Silversides F G, Mérat P, Coquerelle G
Laboratoire de Génétique Factorielle, Institut National de la Recherche Agronomique, France.
Poult Sci. 1992 May;71(5):813-20. doi: 10.3382/ps.0710813.
A series of experiments investigated early pleiotropic effects of a gene for imperfect albinism (s(al-c) in a population of chickens at Jouy-en-Josas, France. An elevated incidence of lesions of the navel, hocks, and nares typical of imperfect albinos were seen on these chicks, confirming their existence in this population. Variations in hatching environment and the amount of light in the hatcher both implicated in contributing to the occurrence of lesions of the hocks and nares, but not to those of the naval. In two experiments, using batteries and cages, early growth was reduced among albinos and early mortality was increased. Significant genotype by environment interactions for weight at 4 days and growth to this time, but not thereafter, suggested that the effect is restricted to this time. Unfavorable environments were most deleterious to albinos. In a third experiment, conducted in floor pens, the gene had no effect on either early growth or mortality. There was no effect of the gene on the lesions, early growth, or mortality when carried by heterozygous males (s+/s(al-c)).
在法国朱伊昂若萨的一群鸡中，一系列实验研究了不完全白化病基因（s(al-c)）的早期多效性影响。在这些小鸡身上观察到了不完全白化病典型的肚脐、跗关节和鼻孔病变的发生率升高，证实了该基因在这个鸡群中的存在。孵化环境的变化以及孵化箱中的光照量都与跗关节和鼻孔病变的发生有关，但与肚脐病变无关。在两个实验中，使用电池孵化器和笼子饲养，白化鸡的早期生长减缓，早期死亡率增加。4日龄体重及到此时的生长存在显著的基因型与环境互作，但此后则不存在，这表明这种影响仅限于这个时期。不利环境对白化鸡最为有害。在第三个实验中，在地面围栏中进行饲养，该基因对早期生长或死亡率均无影响。当由杂合子雄性（s+/s(al-c)）携带时，该基因对病变、早期生长或死亡率均无影响。
