Babu K A, Shah V C
Cell Biol Int Rep. 1981 Mar;5(3):229-37. doi: 10.1016/0309-1651(81)90221-6.
The incidence of supernumerary chromosomes has been frequently observed in one of the subspecies of Indian bush rat, Golunda ellioti gujerati Thomas 1923. Their number varied from 1 to 4 with consistent number of supernumeraries in each individual specimen. A possible explanation is given towards the origin of supernumerary chromosomes in Golunda ellioti gujerati. Two acrocentric chromosomes can give rise to a single large acrocentric and a supernumerary chromosome. This can happen by separation of centromere from one of the acrocentrics and translocation of the centric arms to the telomeric region of the second chromosomes, thus to form large acrocentric leaving the centromeric fragment as supernumerary chromosome.
在印度林鼠的一个亚种——古吉拉特林鼠（Golunda ellioti gujerati Thomas 1923）中，常观察到额外染色体的出现。其数量从1条到4条不等，且每个个体标本中的额外染色体数量一致。针对古吉拉特林鼠中额外染色体的起源给出了一种可能的解释。两条近端着丝粒染色体可产生一条单一的大型近端着丝粒染色体和一条额外染色体。这可能是通过近端着丝粒染色体之一的着丝粒分离，并将着丝粒臂易位到第二条染色体的端粒区域，从而形成大型近端着丝粒染色体，而着丝粒片段则作为额外染色体保留下来。
