1. Publisher's announcement

   Announcement Pages: I - I

2. C-genome chromosome substitution lines in Brassica juncea (L.) Coss

   • S. S. Banga

   OriginalPaper Pages: 81 - 84

3. Behaviour of rye univalents in hybrids of 6x-triticale with Triticum turgidum (L.) ssp. turgidum conv. durum (Desf.)

   • A. Bernardo
   • N. Jouve

   OriginalPaper Pages: 85 - 88

4. The effect of Secale cereale L. heterochromatin on wheat chromosome pairing

   • A. Bernardo
   • M. Gareia
   • N. Jouve

   OriginalPaper Pages: 89 - 95

5. Chromosome analysis of three species of Patella (Archaeogastropoda)

   • P. Cervella
   • L. Ramella
   • G. Sella

   OriginalPaper Pages: 97 - 103

6. Mitotic and meiotic chromosomes of Mabuya (Scincidae: Reptilia)

   • I. M. S. de Cólus
   • I. Ferrari

   OriginalPaper Pages: 105 - 111

7. Parental age dependent changes as a source of genetic variation in Drosophila melanogaster

   • D. Marinkovié
   • I. Bajraktari

   OriginalPaper Pages: 113 - 121

8. Stable polymorphism for mutant eye colour geues in populations of Drosophila melanogaster in two different media

   • C. Náiera
   • J. L. Ménsua

   OriginalPaper Pages: 123 - 131

9. Natural populations of Drosophila simulans show great uniformity of the mitochondrial DNA restriction map

   • L. Nigro

   OriginalPaper Pages: 133 - 136

10. Non-relationship between nucleolus and sex chromosome system Xy_p in Chelymorpha variabilis boheman (Coleoptera: Chrysomelidae)

    • A. Postiglloni
    • N. Brum-Zorrilla

    OriginalPaper Pages: 137 - 141

11. Standard G-banded karyotype, constitutive heterochromatin and nucleolus organizer regions in the roe deer (Capreolus capreolus L.)

    • M. Rubini
    • F. Fontana

    OriginalPaper Pages: 143 - 148

12. Synaptic behaviour and recombination nodules in the human XY pair

    • Alberto J. Solari

    OriginalPaper Pages: 149 - 158