Studies on the Murine Chromosomes, IV
The karyotypes of the mole-rat and the harvest-mouse
1944 Volume 13 Issue 2 Pages 237-245
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1944 Volume 13 Issue 2 Pages 237-245
The number of chromosomes in the mole-rat, Nesokia nemorivaga taiwanus TOKUDA was found 46 in diploid and 23 in haploid. The diploid complement consists of 11 homologous pairs of V-shaped (syntelomitic) elements, 11 homologous rod-shaped (orthotelomitic) ones, and an unequal pair made up of a large X and a small Y element. The harvest-mouse, Micromys minutes takasagoensis TOKUDA possesses 68 diploid and 34 haploid chromosomes. The chromosome composition is apparently dimorphic, being constituted from two prominent V-shaped ones forming a homologous pair, and from 66 rod-shaped elements of varying lengths which are sorted into 32 homologous autosome pairs, and into one XY-pair of unequal size. The cytological evidences which seem to correlate with the taxonomical peculiarities were considered in the two forms under study.
