1. Immunochemical prognosis of heterosis in Zea mays

   • P. Dimitrov
   • O. Nashkova
   • E. Marinkov

   OriginalPaper Pages: 91 - 95

2. Analysis of means in the case of nonequivalent reciprocal crosses in autogamous plants

   • Rustem Aksel

   OriginalPaper Pages: 96 - 103

3. Further discovery of alien cytoplasms inducing haploids and twins in common wheat

   • K. Tsunewaki
   • T. Ryu Endo
   • Y. Mukai

   OriginalPaper Pages: 104 - 109

4. Estimation in the general incomplete block design with applications to the analysis of mating structures

   • Thomas R. Bement
   • V. Jayarama Krishna
   • Robert R. Schalles

   OriginalPaper Pages: 110 - 116

5. Genetic analysis of seed-weight in reciprocal crosses of flax (Linum usitatissimum L.)

   • W. E. Smith
   • Rustem Aksel

   OriginalPaper Pages: 117 - 121

6. Phenotypic variability and divergence in disruptive selection

   • Rita Alicchio
   • L. Domenico Palenzona

   OriginalPaper Pages: 122 - 125

7. The inheritance of anther extrusion in two spring wheat varieties

   • G. C. M. Sage
   • Maria Jose De Isturiz

   OriginalPaper Pages: 126 - 133

8. Book reviews

   • Kh. Lohs
   • J. Schöneich
   • H. Wilbert

   BookReview Pages: 134 - 136