Problems in breeding and cytology of sugar cane

Occasion for writing this article was the appearance of two papers of Price, one concerning the occurrence of apomixis in sugar cane, the other dealing with cytological results of intra-and interspecific crosses of Saccharum. Especially in the latter he criticized Bremer's discovery of endo-duplication during megasporogenesis in Saccharum forms.The present author formulates his stand-point by an ample discussion of endoduplication as cause of chromosome increase in Saccharum crosses. The phenomenon of parthenogenesis is treated in relation to hybridization and speciation. The author concludes that Price gives evidence of insufficient understanding of endo-duplication while also about the occurrence of parthenogenesis he cannot agree with him.