1. Genetic processes in intergeneric cell hybrids Atropa + Nicotiana

   • Yu. Yu. Gleba
   • V. P. Momot
   • V. Kotov

   OriginalPaper Pages: 269 - 276

2. A selection response plateau for radiation resistance in the cotton boll weevil

   • F. D. Enfield
   • D. T. North
   • L. Rotering

   OriginalPaper Pages: 277 - 281

3. Book reviews

   • R. C. Agoha

   BookReview Pages: 282 - 282

4. Plant tumor reversal associated with the loss of marker chromosomes in tobacco cells

   • A. Mouras
   • A. Lutz

   OriginalPaper Pages: 283 - 288

5. Cybrids containing mixed and sorted-out chloroplasts following interspecific somatic fusions in Nicotiana

   • R. Fluhr
   • D. Aviv
   • E. Galun

   OriginalPaper Pages: 289 - 294

6. Population genetics in the American Tropics

   • H. F. Hoenigsberg
   • M. M. E. de Polanco
   • M. Ordoñez

   OriginalPaper Pages: 295 - 301

7. Book reviews

   • R. C. Agoha

   BookReview Pages: 302 - 302

8. Cell-cycle dependency of radiosensitivity and mutagenesis in fertilized egg cells of rice, Oryza sativa L.

   • Y. Kowyama

   OriginalPaper Pages: 303 - 308

9. Reproductive systems in conifer seed orchards

   • G. Müller-Starck
   • M. Ziehe
   • H. H. Hattemer

   OriginalPaper Pages: 309 - 316

10. Estimation of variance components and heritability in populations affected by disease: lymphoid leukosis in chickens

    • J. S. Gavora
    • J. Chesnais
    • J. L. Spencer

    OriginalPaper Pages: 317 - 322

11. Studies on the organelle genomes of sugarbeet with male-fertile and male-sterile cytoplasms

    • A. Powling
    • T. H. N. Ellis

    OriginalPaper Pages: 323 - 328

12. Phenotypic variation and ploidy level of plants regenerated from protoplasts of tetraploid potato (Solanum tuberosum L. cv. ‘Bintje’)

    • K. Sree Ramulu
    • P. Dijkhuis
    • S. Roest

    OriginalPaper Pages: 329 - 338

13. Genetic and cytoplasmic effects on chlorophyll content in pearl millet

    • P. D. Mehndiratta
    • P. S. Phul

    OriginalPaper Pages: 339 - 342

14. Intraspecific variation in C-banded chromosomes of Aegilops comosa and Ae. speltoides

    • S. B. Teoh
    • T. E. Miller
    • S. M. Reader

    OriginalPaper Pages: 343 - 348

15. The genetic control of the enzyme UDP-glucose: 3-0-flavonoïd-glucosyltransferase in flowers of Petunia hybrida

    • A. G. M. Gerats
    • M. Wallroth
    • A. W. Schram

    OriginalPaper Pages: 349 - 352

16. Morphology and cytology of Hordeum chilense X H. bulbosum hybrids

    • J. A. Padilla
    • A. Martín

    OriginalPaper Pages: 353 - 355

17. Book reviews

    • J. Straub

    BookReview Pages: 356 - 356