Thorgaard G H
Cytogenet Cell Genet. 1976;17(4):174-84. doi: 10.1159/000130711.
White-blood-cell culture was used to examine the chromosomes of 53 rainbow trout (Salmo gairdneri) from three locations in the Pacific Northwest of the United States. A Robertsonian chromosome polymorphism is present, resulting in diploid numbers of 60, 59, or 58 in different individuals with 104 chromosome arms. The low level of intraindividual Robertsonian variation, differences in the number of subtelocentric chromosomes between individuals with different chromosome numbers, and frequencies of fish with different chromosome numbers in one population suggest that the interindividual differences are inherited and not somatic. C-banding shows that constitutive heterochromatin is localized near the centromeres and near the secondary constriction one chromosome pair.
采用白细胞培养法对来自美国太平洋西北部三个地点的53条虹鳟（Salmo gairdneri）的染色体进行了检测。存在罗伯逊易位染色体多态性，导致不同个体的二倍体数目为60、59或58，染色体臂数为104。个体内罗伯逊易位变异水平较低、不同染色体数目的个体之间亚端着丝粒染色体数量存在差异，以及一个种群中不同染色体数目的鱼的频率表明个体间差异是可遗传的而非体细胞变异。C带显示组成型异染色质定位于着丝粒附近以及一对染色体的次缢痕附近。
