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For many decades plant breeding has made use of morphological analyses in producing new varieties. This to no small measure has been greatly advanced by the developments of genetics in this century.

One of the features missing in morphological analyses is that the development of the components of the yield are not revealed. Physiological genetics provide such valuable other methods.

This book which is well documented by tables and figures is an attempt to summarize for the first time this branch of genetical science. It will be a valuable guide to plant growers, biologists and agronomists for a better understanding of plant development and for increasing productivity.

Contents: Preface. 1 Physiological genetics and its relation to other fields of genetics. 2 Genetics of physiological yield components and agronomical characters. 3 Nutrient utilization. 4 Water utilization. 5 Genetic effects of herbicides and pesticides. 6 Structure of the ideal plant type. 7 Heterosis. Conclusion. Bibliography. Subject index.