Wheat Information Service No.43 Wheat Information Service No.43



Contents

I. Research Notes:
H. S. DHALIWAL:Abnormal pollen tetrads in Triticum urartu, p.1
M. TANAKA and T. KAWAHARA:Wild tetraploid wheats from northern Iraq cytogenetically closely related to each other, p.3
R. DE V. PIENAAR and G. F. MARAIS:The effect of the D-genome on kernel set and viability in wheat x rye crosses, p.4
K. D. BEATTY, E. A. RUPERT and N. DEHGAN:Doubling chromosome numbers of wheat-rye amphiploids with colchicine, DMSO, and cold treatment, p.10
D. KUMAR:Yielding ability of the mutants induced from wheat var. K68 against released varieties at different levels of nitrogen, p.13
N. JOUVE and A. FOMINAYA:Microsporogenesis of two wheat cultivars with Aegilops caudata, Aegilops ventricosa and Triticum timopheevi cytoplasms, p.16
A. S. LARIK:Gamma irradiated morphogenesis in bread wheat (Triticum aestivum L.), p.19

II. Report, p.22

III. News:
(1) Fifth International Wheat Genetics Symposium, p.31
(2) XIV International Congress of Genetics, p.33

IV. Editorial Remarks:
Announcement for future issues, ...iii
Membership Fee, ...iii
Acknowledgment, ...iii
Coordinating Committee, ...iv
Explanation of the Figure on the Cover, ...ii