1. Sexual progeny of somatic hybrids between potato andSolanum brevidens: Potential for use in breeding programs

   • John P. Helgeson
   • Geraldine T. Haberlach
   • Sandra Austin

   OriginalPaper Pages: 437 - 452

2. Morphological changes and yield enhancement of Russet Burbank potatoes by AC 243,654

   • Alexander D. Pavlista

   OriginalPaper Pages: 453 - 462

3. Effects of plant population on the performance of seven varieties in the Klamath Basin of Oregon

   • K. A. Rykbost
   • J. Maxwell

   OriginalPaper Pages: 463 - 474

4. Zone-subsoiling effects on potato yield and grade

   • R. E. Sojka
   • D. T. Westermann
   • M. Thornton

   OriginalPaper Pages: 475 - 484

5. Interspecific somatic hybridization betweenSolanum tuberosum L. andS. bulbocastanum dun. as a means of transferring nematode resistance

   • S. Austin
   • J. D. Pohlman
   • J. P. Helgeson

   OriginalPaper Pages: 485 - 495

6. Sixth International Vertillium Symposium

   Announcement Pages: 496 - 496

7. Notice

   Announcement Pages: 496 - 496

8. Detection of potato leafroll virus by visual inspection, direct tissue blotting and ELISA techniques

   • J. L. Whitworth
   • R. G. Samson
   • A. R. Mosley

   OriginalPaper Pages: 497 - 503