Wheat Information Service No.57 
Contents
I. Research Notes:
M. OZGEN:Morphological characters and meiotic associations
in a T. durum Desf. var. hordeiforme Korn. x Ae. umbellulata
Zhuk. hybrid, p.1
U. KUSHNIR & G.M. HALLORAN:Evidence on the origin of
the G genome in wheat: Physiological and quantitative character variation in a
Triticum timopheevi-like mutant, p.4
R.K. CHOWDHURY:Hybrid necrosis in wheat, p.9
R.K. BEHL and N. MAHERCHANDANI:Hybrid necrosis in
hexaploid triticale, p.12
S.N. TALWAR & M.G. JOSHI:Efficacy of single crosses
versus three-way hybrids in tetraploid Triticum species, p.15
R.K. CHOWDHURY:A note on effect of gamma irradiation
in wheat, p.21
T.M. SHNAIDER & O.J. PRIILINN:Indentification of the
chromosomal translocations in wheat, p.24
M.M. RAJPUR, A.J. MALIK & M.B.-AAS:Cytogenetical effects
of radiation on the stability of triticale, p.28
M.B. KUMBHAR & A.S. LARIK:Effect of plant density
on the growth and yield potential of durum and bread wheat cultivars, p.32
K.H. GAMIL & Y.A. AL-SAHEAL:Estimation of genetic
effects for agronomic traits in wheat, p.36
M.B. KUMBHAR, A.S. LARIK, H.M.I. HAFIZ & M.J. RIND:Interrelationship
of polygenic traits affecting grain yield in Triticum aestivum L., p.42
II. Editorial Remarks:
Announcement for Future Issues, p.46
Membership Fee, p.46
Acknowledgement, p.46
Coordinating Committee, ...iii