1. Induced suppression of genetic recombination in females of the Mediterranean fruit fly, Ceratitis capitata (Wied.), by translocation heterozygosity

   • E. Busch-Petersen
   • D. I. Southern

   OriginalPaper Pages: 161 - 169

2. Effects of centric fusions on chiasma frequency and position in Leptysma argentina (Acrididae: Orthoptera) I. Spontaneous and stable polymorphic centric fusions

   • P. C. Colombo

   OriginalPaper Pages: 171 - 179

3. The use of genetic markers in the analysis of competitive interactions in Drosophila melanogaster

   • P. Eggleston

   OriginalPaper Pages: 181 - 186

4. Aging and chiasma frequency in Eyprepocnemis plorans (Orthoptera: Acrididae)

   • N. Henriques-Gil
   • P. Arana

   OriginalPaper Pages: 187 - 192

5. Pleiotropic effects of environment-sensitive genes affecting fitness in relation to postmating reproductive isolation

   • P. Hutter

   OriginalPaper Pages: 193 - 198

6. Fitness relationships under different temperature regimes in Drosophila melanogaster: the eyeless/shaven-naked genetic system

   • M. J. Kohane

   OriginalPaper Pages: 199 - 210

7. Chromosomal instability in lemon grass, Cymbopogon flexuosus (Steudel) Wats

   • U. C. Lavania

   OriginalPaper Pages: 211 - 215

8. Study of electrophoretic variability in Epipactis helleborine (L.) Crantz, E. palustris (L.) Crantz and E. microphylla (Ehrh.) Swartz (fam. Orchidaceae)

   • R. Scacchi
   • R. Lanzara
   • G. De Angelis

   OriginalPaper Pages: 217 - 224

9. On the karyosystematics of cyprinid fishes and a summary of fish chromosome studies in China

   • Yu X.
   • Zhou T.
   • Zhou M.

   OriginalPaper Pages: 225 - 235