1. Chromatidenspaltung beim Merkmal Nematodenresistenz der Kartoffel

   • E. Tellhelm
   • A. Raeuber
   • H. Stelter

   OriginalPaper Pages: 219 - 226

2. Heterosis and combining ability ofSolanum tuberosum Group Andigena haploids

   • J. A. Landeo
   • R. E. Hanneman Jr.

   OriginalPaper Pages: 227 - 237

3. Cross-reactions betweenCorynebacterium sepedonicum andArthrobacter polychromogenes in immunofluorescence staining

   • A. Calzolari
   • C. Bazzi
   • U. Mazzucchi

   OriginalPaper Pages: 239 - 246

4. A rapid quantitative determination of the individual glycoalkaloids in tubers and leaves ofSolanum tuberosum L.

   • R. Jellema
   • E. T. Elema
   • Th. M. Malingré

   OriginalPaper Pages: 247 - 255

5. The effects of colchicine doubling of potato dihaploid X wild species hybrids on eelworm resistance and pollen ‘stainability’

   • F. A. Langton
   • H. Ross

   OriginalPaper Pages: 257 - 263

6. Selection of first-year potato seedlings for resistance to potato leaf roll virus

   • Hanna Butkiewicz
   • M. A. Dziewońska

   Short Communication Pages: 265 - 268

7. True potato seed drying over rice

   • S. Sadik
   • J. W. White

   Short Communication Pages: 269 - 272

8. Neue Methode zur Kultur vonPhytophthora infestans (Mont.) de Bary in Flüssigmedien

   • K. Stolle
   • Bärbel Schöber

   Short Communication Pages: 273 - 276

9. News

   News Pages: 277 - 277

10. Pseudogamic production of dihaploids and monoploids ofSolanum tuberosum and some related species

    • K. Moore

    Review Pages: 278 - 278

11. Council notices

    Association News Pages: 279 - 279

12. Section notices

    • J. H. W. Holden
    • W. Reust

    Association News Pages: 279 - 281

13. Variation in pathogenicity among isolates ofPhoma exigua var.foveata on potato cultivars differing in resistance

    Erratum Pages: 282 - 282