Todd N B, Todd L M
J Hered. 1976 Nov-Dec;67(6):368-72. doi: 10.1093/oxfordjournals.jhered.a108754.
Surveys to determine mutant allele frequencies in domestic cats of the Canadian Atlantic Provinces (Halifax, Nova Scotia; Fredericton, New Brunswick; Charlottetown, Prince Edward Island; St. John's Newfoundland) and the French colony of Saint Pierre, Saint Pierre et Miquelon, reveal a general regional homogeneity for most factors. Despite diverse historical patterns of settlement, a strong common component of origin is indicated. This is tentatively identified as late 18th and early 19th century British. One mutant, polydactyly, which is of New England origin appears to have been distributed largely by loyalist refugees from New England at the time of the American Rebellion. No elements of a specific Acadian (French) character have yet been identified. Siamese cats have been "introduced" to the region in recent years and are now so abundant that they will undoubtedly cause a significant change in some mutant allele frequencies over the next few decades. Interregional exchanges of cats no doubt are contributing to homogenizing the populations of the area, but the practice of sterilization of pets offsets this to some degree.
为确定加拿大大西洋省份（新斯科舍省哈利法克斯市；新不伦瑞克省弗雷德里克顿市；爱德华王子岛省夏洛特敦市；纽芬兰圣约翰市）以及圣皮埃尔和密克隆群岛的法国殖民地圣皮埃尔的家猫中突变等位基因频率所开展的调查显示，多数因素呈现出总体区域同质性。尽管有着多样的定居历史模式，但仍表明存在一个强大的共同起源成分。初步确定这一起源为18世纪末和19世纪初的英国人。一种源自新英格兰的突变性状——多指畸形，似乎主要是由美国独立战争时期来自新英格兰的效忠派难民传播开来的。尚未发现具有特定阿卡迪亚（法国）特征的元素。近年来，暹罗猫已被“引入”该地区，如今数量众多，无疑将在未来几十年导致某些突变等位基因频率发生显著变化。猫的区域间交流无疑有助于该地区猫种群的同质化，但宠物绝育做法在一定程度上抵消了这一影响。
