Rao S R, Vasantha K, Thelma B K, Juyal R C, Jhanwar S C
Cytogenet Cell Genet. 1983;35(4):233-7. doi: 10.1159/000131873.
Nesokia indica, the Indian mole rat, exhibits extensive variability (polymorphism) for the constitutive heterochromatin of the X and Y chromosomes. These polymorphic X and Y types range from a large metacentric chromosome to a small acrocentric one and occur in different frequencies in the population. On the assumption that there is random mating among individuals carrying these various X and Y chromosomes, the population shows Hardy-Weinberg proportions for the genotypes. However, notwithstanding the partial or total loss of constitutive heterochromatin of the X and Y chromosomes in a few individuals, its retention in most of the animals seems obligatory to the population at large. Hence, we suggest that the C-heterochromatin plays a "regulatory" role in the population dynamics of this species.
印度鼹形田鼠（Nesokia indica）的X和Y染色体组成型异染色质表现出广泛的变异性（多态性）。这些多态性的X和Y类型从大的中着丝粒染色体到小的近端着丝粒染色体不等，且在种群中以不同频率出现。假设携带这些不同X和Y染色体的个体之间随机交配，该种群的基因型呈现哈迪-温伯格比例。然而，尽管少数个体的X和Y染色体组成型异染色质部分或完全缺失，但在大多数动物中其保留对整个种群而言似乎是必需的。因此，我们认为C-异染色质在该物种的种群动态中发挥着“调节”作用。
