1. Selection for efficiency of feed utilization in growing mice

   • E. Yüksel
   • W. G. Hill
   • R. C. Roberts

   OriginalPaper Pages: 129 - 137

2. Book reviews

   • I. Gustavsson
   • H. Skjervold
   • Tröbner

   BookReview Pages: 138 - 138

3. Genetic segregation in relation to chromosome pairing in tetraploid hybrids between Lolium perenne and L. multiflorum

   • E. J. Lewis

   OriginalPaper Pages: 139 - 143

4. Book reviews

   • W. Dedek
   • Y. Gleba

   BookReview Pages: 144 - 144

5. Genetic studies of frost resistance in wheat

   • J. Sutka

   OriginalPaper Pages: 145 - 152

6. An evaluation of mitochondrial heterosis and in vitro mitochondrial complementation in wheat, barley and maize

   • D. Sen

   OriginalPaper Pages: 153 - 160

7. Mitochondrial DNA variation in maize plants regenerated during tissue culture selection

   • B. G. Gengenbach
   • J. A. Connelly
   • M. F. Conde

   OriginalPaper Pages: 161 - 167

8. Book reviews

   • H. F. Linskens
   • K. Gröber

   BookReview Pages: 168 - 168

9. Origin and differentiation of Aegilops triuncialis L. as determined by esterase isozyme analysis

   • Y. Nakai

   OriginalPaper Pages: 169 - 175

10. Basis and extent of genetic variability among doubled haploid plants obtained by pollen culture in Nicotiana sylvestris

    • R. De Paepe
    • D. Bleton
    • F. Gnangbe

    OriginalPaper Pages: 177 - 184

11. S-specific proteins in styles of self-incompatible Nicotiana alata

    • G. M. M. Bredemeijer
    • J. Blaas

    OriginalPaper Pages: 185 - 190

12. Streptomycin resistant and sensitive somatic hybrids of Nicotiana tabacum + Nicotiana knightiana: correlation of resistance to N. tabacum plastids

    • L. Menczel
    • F. Nagy
    • P. Maliga

    OriginalPaper Pages: 191 - 195

13. Announcements

    Announcement Pages: 196 - 196