1. Genetic heterogeneity among the founders of laboratory populations of Drosophila melanogaster

   • P. A. Parsons

   OriginalPaper Pages: 337 - 340

2. Der Pigmentgehalt induzierter Mutanten von Pisum sativum als Grundlage einer neuen Farbcharakterisierung und seine Beziehung zur Plastidengröße

   • H. Hipke

   OriginalPaper Pages: 341 - 344

3. Selection and recombination in Drosophila melanogaster

   • Domenico L. Palenzona
   • Annamaria Zattoni

   OriginalPaper Pages: 345 - 346

4. Threshold concentration of plasmon-sensitive polygenes in the expression of quantitative characters of maize (Zea mays L.)

   • B. K. Bhat
   • N. L. Dhawan

   OriginalPaper Pages: 347 - 350

5. Genetic factors affecting maize tolerance to low temperatures at emergence and germination

   • N. V. Pešev

   OriginalPaper Pages: 351 - 356

6. Sampling variance of the correlation coefficients estimated from analyses of variance and covariance

   • M. Grossman

   OriginalPaper Pages: 357 - 359

7. Cytological evidence on the origin of sweet potato

   • M. L. Magoon
   • R. Krishnan
   • K. Vijaya Bai

   OriginalPaper Pages: 360 - 366

8. The En mutable system in maize

   • Peter A. Peterson

   OriginalPaper Pages: 367 - 377

9. The significance of haploid higher plants for plant physiology and plant breeding

   • Georg Melchers
   • Gudrun Labib

   Brief Notice Pages: 378 - 378

10. Book reviews

    • Peter Hanelt
    • W. Seyffert
    • S. Rosenthal

    BookReview Pages: 378 - 380