Chromosomes of Five Rodent Species


SATISFACTORY cytogenetic studies with existing laboratory mammals are at present virtually impossible owing to the large number and small size of their chromosomes. A small eutherian which could be bred in the laboratory and which had few, relatively large, chromosomes would be invaluable. Matthey's1 recent count of 2n = 17 in the fossorial vole, Ellobius lutescens, and the earlier report of 2n = 14 in the South African insectivore Elephantulus myurus 2 (which, however, is questioned by Matthey3) encourage the hope that a suitable species may yet be found. Only about 120 rodent species, representing forty-nine of the 345 genera listed by Ellerman4, have been studied cytologically. We have therefore examined the chromosomes of five African species which we have been able to obtain from laboratories in Great Britain.

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FORD, C., HAMERTON, J. Chromosomes of Five Rodent Species. Nature 177, 140–141 (1956).

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