Abstract
Artificial interspecific hybrids in “diploid” species of potatoes have been recorded by Bukasov (1938), Emme (1936), Reddick (1939), and others. These authors paid little, if any, attention to the number and behaviour of the chromosomes in their plants, but rather concentrated on interspecific compatibilities, inheritance of flower colour, and resistance to disease or the genetical sequellæ to exposure to low temperature, all with regard to the possible utilisation of the plants in commerce.The present cytological investigations are primarily concerned with the cytology of two interspecific “diploid” potato hybrids with a view to determining the homology of the chromosomes of the parents and its bearing on sterility.
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