1. The references cited in this chapter, together with those for Chapter 1, are listed in References – Part I, pages 42–44.
2. Principles of Plant Breeding;ALLARD,1960
3. Studies on the inheritance of disease resistance;BIFFEN;Journal of Agricultural Science, Cambridge,1907
4. BRIGGS, J.B. and ALSTON, F.H. (1967). Pest avoidance by late-flowering apple varieties. In Annual Report of the East Mailing Research Station for 1966, p.170
5. Introduction to Plant Breeding;BRIGGS,1967