1. Sex characteristics and inheritance of sex in asparagus (Asparagus officinalis L.)

   • A. A. Franken

   OriginalPaper Pages: 277 - 287

2. Tissue culture of the oil palm (Elaeis guineensis Jacq.) as a tool for its vegetative propagation

   • G. Staritsky

   OriginalPaper Pages: 288 - 292

3. The relation between growth, juvenile Period and fruiting of apple seedlings And its use to improve breeding Efficiency

   • T. Visser

   OriginalPaper Pages: 293 - 302

4. A microscopical research on the incompatibility in the crossRhododendron impeditum × R. Williamsianum

   • Y. O. Kho
   • J. Baër

   OriginalPaper Pages: 303 - 309

5. Yield and quality of the glasshouse carnation (Dianthus caryophyllus L.) after mutagenic radiation with x-rays

   • L. D. Sparnaaij
   • J. F. Demmink

   OriginalPaper Pages: 310 - 316

6. Fertility, late blight resistance and genome relationship in an interspecific hybrid,Solanum polytrichon Rydb × S.Phureja Juz. et Buk.

   • M. S. Ramanna
   • M. M. F. Abdalla

   OriginalPaper Pages: 317 - 326

7. Establishment ability of cacao progenies in Nigeria

   • H. Toxopeus

   OriginalPaper Pages: 327 - 333

8. Meiosis and seed set of Pugsley's ‘sterile’ wheat

   • A. C. Zeven
   • P. Kampmeijer
   • A. H. Eenink

   OriginalPaper Pages: 334 - 337

9. Crossability between a diploidPelargonium × hortorum Bailey cultivar and some of its putative ancestral species

   • T. W. Chow
   • Patricia M. Harney

   OriginalPaper Pages: 338 - 348

10. Reaction to the cotton root-knot nematodes and the pollen and seed fertility of kenaf-roselle (Hibiscus cannabinus × H. sabdariffa) allohexaploids

    • F. D. Wilson
    • W. C. Adamson

    OriginalPaper Pages: 349 - 355

11. Genotypic association between grain yield and six agronomic traits in a cross between rice varieties of contrasting plant type

    • T. T. Chang
    • O. Tagumpay

    OriginalPaper Pages: 356 - 363

12. Time and site of theS-gene action, breeding systems and relationships in incompatibility

    • K. K. Pandey

    OriginalPaper Pages: 364 - 372

13. Self-incompatibility inRibes

    • N. T. Arasu

    OriginalPaper Pages: 373 - 378

14. Note on visual distinction of fluorescent callose of pollen tubes and of sieve tubes in stylar tissue ofBrassica and its allies

    • M. Chu Chou
    • D. J. Harberd

    OriginalPaper Pages: 379 - 381

15. Intra-varietal variation of yield in two varieties ofLolium perenne L.

    • A. Troughton

    OriginalPaper Pages: 382 - 389

16. The morphogenetics of induced multinodosum with monopodial branching in barley

    • K. S. Gill
    • G. S. Sethi

    OriginalPaper Pages: 390 - 393

17. Association between certain stalk traits related to lodging and grain yield in maize (Zea mays L.)

    • T. P. Singh

    OriginalPaper Pages: 394 - 397

18. Productivity of F hybrids of botanical varieties ofBrassica oleracea L.

    • L. E. Watts

    OriginalPaper Pages: 398 - 404

19. Inheritance of flowering time in six pea cultivars (Pisum sativum L.)

    • L. E. Watts
    • E. Stevenson
    • M. J. Crampton

    OriginalPaper Pages: 405 - 410

20. Book announcements

    Announcement Pages: 411 - 411