McGibbon W H
J Hered. 1979 Jan-Feb;70(1):44-6. doi: 10.1093/oxfordjournals.jhered.a109186.
A mutation of recent origin in Cornell randombred Leghorn chickens causes the shanks to be colored green due to melanin-like deposition in the dermis, in contrast to normal yellow. Some pigment is often present in the mandibles and the mature feathers display an ashen cast. This mutant is determined by an allele, idc, on the sex chromosome. Excessive adult mortality with a high incidence of tumors, mainly hemangiomas, is associated with this gene--at least extending over a two-generation observation interval. Pullets receiving this mutant allele (idc) from their sire die at 2 to 3 times the rate of sisters, with yellow shanks, that carry the Id allele.
康奈尔随机繁殖来亨鸡中最近出现的一种突变，会使胫部因真皮中类似黑色素的沉积而呈现绿色，与正常的黄色不同。下颌通常也会有一些色素沉着，成熟羽毛呈现灰白色。这种突变由性染色体上的一个等位基因idc决定。该基因与成年鸡的高死亡率以及高肿瘤发病率相关，主要是血管瘤——至少在两代的观察期内如此。从父亲那里获得这种突变等位基因（idc）的小母鸡死亡率是携带Id等位基因、胫部黄色的姐妹的2至3倍。
