1. Cytogenetics of a factor for syncyte formation and male sterility in Pennisetum americanum

   • M. K. Rao
   • P. R. K. Koduru

   OriginalPaper Pages: 1 - 7

2. Participation of the intracellular enzymes in the control of the mutation process

   • V. N. Soyfer
   • N. A. Kartel

   OriginalPaper Pages: 9 - 15

3. Theory of nucleus breeding schemes with overlapping generations

   • I. R. Hopkins
   • J. W. James

   OriginalPaper Pages: 17 - 24

4. Possible biases in heritability estimates from intraclass correlation

   • R. W. Ponzoni
   • J. W. James

   OriginalPaper Pages: 25 - 27

5. Genetics of seed-coat colour in Citrullus lanatus (Thunb.) Mansf.

   • P. Nath
   • R. C. Khandelwal

   OriginalPaper Pages: 29 - 31

6. The cytogenetic structure of Vicia sativa aggregate

   • G. Ladizinsky
   • Rina Temkin

   OriginalPaper Pages: 33 - 42

7. Direct pollination of Zea mays ovules in vitro with Z. mays, Z. mexicana and Sorghum bicolor pollen

   • S. Dhaliwal
   • P. J. King

   OriginalPaper Pages: 43 - 46

8. Book reviews

   • J. F. Jackson
   • H. F. Linskens
   • G. A. J. v. Os

   BookReview Pages: 47 - 48

9. Announcement

   Announcement Pages: 48 - 48