Potato Varieties

1. The definition of a potato variety; 2. Historical sketch of the development of present-day varieties; 3. The life of a variety; 4. The methods of producing new varieties; 5. The application of genetics to variety; 6. The technique of hybridization; 7. The classification of varieties; 8. Classificatory guide; 9. Correlations of linkages; 10. Varietal differences of maturity; 11. The yield or crop of the potato, and the genetic factors affecting the same; 12. The yield or crop of the potato, and the environmental factors affecting the same; 13. Yield trials; 14. Varietal differences in the production of ware; 15. Varietal differences and their basis on chemical and histological characters of the tuber; 16. Differential histological features of the tuber; 17. Varietal resistance to disease; 18. Virus diseases and varietal resistance to their infection; 19. Degenerative changes of unknown origin; 20. Varietal differences in respect to extremes of temperature; 21. The adaptations of varieties to special conditions of soil and climate; 22. Synonymity; 23. The leaf index; 24. Varietal descriptions; 25. Common employment of the varieties described; 26. Descriptions of varieties with their history and synonyms; Appendix I. Blank varietal description forms; Appendix II. A yeild test conducted by the N.I.A.B. investigated statistically by W. H. Parker, M.A.; Appendix III. The origin of Messrs Sutton and Sons' varieties during the last half century; Bibliography; Index.