X-monosomy in the Indian black rat

A new chromosome number in the Indian spiny mouse, Mus platythrix.

“…Among 27 specimens collected in Mysore, 26 showed the usual diploid number (2n=26) with all the acrocentric chromosomes as already described by Satya-Prakash and Aswathanarayana (1972), Tsuchiya and Yosida (1972) and Yosida (1979) (Fig. 1, A and C).…”

“…A., April 12, 1984) The Indian spiny mouse, Mus platythrix, has a characteristic karyotype consisting of 26 acrocentric chromosomes with a few larger autosomes (Satya-Prakash and Aswathanarayana 1972 ;Tsuchiya and Yosida 1972 ;Yosida 1979 ;Aswathanarayana and Manj unatha 1982). Yosida (1979Yosida ( , 1980a derived the karyotype of this species from that of the house mouse, M, musculus, by proposing tandem fusions of several pairs of the autosomes.…”

Survey on the chromosome polymorphism in the black rat (Rattus rattus) collected in the vessels and the harbor area of the Shimizu port, Japan.

“…In the black rats the XO female was sometimes described in the natural population and the breeding colony (Yong 1971;Yosida et al 1974;Satya-Prakash and Aswathanarayana 1977;Yosida 1977Yosida , 1979. In these cases the XO rats were always the female as seen in the present specimen.…”

Ovarian Histology of Two Xo Murid Rodents From Australia

“…Ovarian histology of XO Mus musculus indicates that follicles mature and form corpora iutea, but a premature loss of oocytes takes place (Lyon and Hawker, 1973). Other rodent species where an occasional XO individual has been reported are Rattus rattus (Yong, 1971;Prakash and Aswathanarayana. 1977;Yosida, 1977) and the Indian mole rate (Sharma and Raman, 1971).…”