1. In memoriam Dr. H. J. Toxopeus

   Announcement Pages: ii+1 - 2

2. Breeding fodder crops in The Netherlands

   OriginalPaper Pages: 3 - 8

3. Clubroot-resistance in turnips (Brassica campestris L.)

   • F. Wit
   • M. Van De Weg

   OriginalPaper Pages: 9 - 18

4. Seasonal influences upon the pod weight of cacao and their consequences for selection

   • J. Ruinard

   OriginalPaper Pages: 19 - 23

5. The use of insects for pollinating brassica crops in small isolation cages

   • D. Wiering

   OriginalPaper Pages: 24 - 28

6. Chloroplast degeneration as a consequence of “hybrid necrosis” in wheat

   • H. Toxopeus
   • J. G. Th. Hermsen

   OriginalPaper Pages: 29 - 32

7. Resistance conferred by new gene combinations to bacterial blight of cotton

   • N. L. Innes

   OriginalPaper Pages: 33 - 43

8. A rapid modification of de Lautour's technique for grass leaf chromosomes

   • Erna Bennett

   OriginalPaper Pages: 44 - 48

9. Inheritance of earliness in barley

   • A. M. Eunus

   OriginalPaper Pages: 49 - 56

10. Cytogenetical studies of two amphidiploids in the genus Oryza

    • R. Gopalakrishnan
    • N. M. Nayar
    • S. Sampath

    OriginalPaper Pages: 57 - 64

11. Theoretical studies on the methodological procedures of radiation breeding

    • Yoshio Yoshida

    OriginalPaper Pages: 65 - 74

12. Genetical analysis of male-sterility in carrots, Daucus carota L.

    • O. Banga
    • J. Petiet
    • J. L. Van Bennekom

    ReviewPaper Pages: 75 - 93

13. Breeding research in sweet potato, Ipomoea batatas poir

    • H. A. Van Rheenen

    OriginalPaper Pages: 94 - 99

14. Reviews of books

    BookReview Pages: 99 - 102