1. Cytogenetic studies on Chorthippus jucundus (Fisch.) (Orthoptera) III. The meiotic consequences of a spontaneous centric fusion

   • C. López-Fernández
   • J. S. Rufas
   • J. Gosálvez

   OriginalPaper Pages: 3 - 7

2. Genetic control of secondary phloic fibres in jute (Corchorus capsularis L.)

   • G. C. Mitra

   OriginalPaper Pages: 9 - 11

3. Further evidence for the presence of meiotic pairing control genes in Alopecurus L. (Gramineae)

   • B. G. Murray
   • V. K. Sieber
   • R. C. Jackson

   OriginalPaper Pages: 13 - 20

4. Population genetics of the metabolically related Adh, Gpdh and Tpi polymorphisms in Drosophila melanogaster I. Geographic variation in Gpdh and Tpi allele frequencies in different continents

   • J. G. Oakeshott
   • S. W. McKechnie
   • G. K. Chambers

   OriginalPaper Pages: 21 - 29

5. Active nucleolar-organizer regions in polyploid populations of Odontophrynus americanus (Amphibia, Anura) from South Brasil

   • I. R. G. Ruiz
   • T. M. B. de Almeida
   • W. Beçak

   OriginalPaper Pages: 31 - 37

6. Analysis of allozymic and quantitative variation produced by artificial selection in Drosophila melanogaster

   • L. Serra
   • J. M. Oller

   OriginalPaper Pages: 39 - 47

7. Genetic differentiation in natural populations of Drosophila ananassae

   • B. N. Singh

   OriginalPaper Pages: 49 - 52

8. Polyploid spore formation in diploid orchid species

   • S. B. Teoh

   OriginalPaper Pages: 53 - 59

9. Extension of life duration by dietary ethanol in Drosophila melanogaster: response to selection in two strains of different origins

   • J. Van Herrewege
   • J. R. David

   OriginalPaper Pages: 61 - 70

10. Hybrid dysgenesis in Drosophila melanogaster: predominance of Q factor in Japanese populations and its change in the laboratory

    • A. Yamamoto
    • F. Hihara
    • T. K. Watanabe

    OriginalPaper Pages: 71 - 77

11. Book review

    • G. Ledyard Stebbins

    BookReview Pages: 79 - 79