Wheat Information Service No.15-16 Wheat Information Service No.15-16



Contents

I. RESERCH NOTES
S. MATSUMURA:Radiation-induced striping in einkorn wheat and its inheritance, p.1
S. MATSUMURA, S. KONDO and T. MABUCHI:Boron effects upon gamma-ray and thermal neutron irradiations in Einkorn wheat; RBE of heavy particles from 10B(n, Alpha)7Li reaction, p.2
T. FUJII:On the occurrence of chlorophyll mutations in the clusters in einkorn wheat, p.4
T. FUJII:Effects of nitrous acid on germinating seeds of Triticum monococcum (negative results), p.5
A. M. SCHLEHUBER:Percentage emergence in Triticum aestivum as affected by seeding rate, season, and variety, p.7
M. D. UPADHYA and A. T. NATARAJAN:Supernumerary constrictions in the sat-chromosome of Triticum, p.9
I. UCHIKAWA:Dense-eared mutants derived from X-ray induced lax-eared wheat, p.10
R. P. CHANDOLA and M. P. BHATNAGAR:Differential radio-sensitivity among the different varieties of bread wheats, p.13
C. ZSCHEGE:Evidence of gene dosage effects in Triticum aestivum, p.15
M. V. RAO:Genetics of field resistance of wheat varieties to the races of stem, leaf and stripe rusts prevalent in India, p.17
K. KATSUYA:Changes in rust susceptibility due to partial irradiation of wheat seedlings and its dose dependence, p.21
T. OHTA:Karyotype analysis of seven D-nullisomic wheat lines and their gigas plants, p.22
K. MATSUMOTO, T. TERAMURA and J. TABUSHI:Development analysis of the rachis disarticulation in Triticum, p.23
J. SCHULZ-SCHAEFFER:Hybridization of Triticum with 3 Agropyron species, p.26
A. ZENNYOZI:F1 hybrids between four species of Secale and Agropyron intermedium, p.30
H. KIHARA and K. TSUNEWAKI:Increased occurrence of haploids and twin seedlings due to an alien cytoplasm, p.32

II. Abstracts
Abstracts from the PROCEEDINGS OF THE SECOND WHEAT GENETICS SYMPOSIUM, JAPAN (Seiken Ziho, No. 13, 1962), p.35
H. FUKASAWA:Biochemical mechanism of pollen abortion and other alterations in cytoplasmic male-sterile wheat, p.35
K. TSUNEWAKI:Functional differentiation among the homoeologous chromosomes of common wheat, p.38
M. KAMANOI and B. C. JENKINS:Trisomics in common rye, Secale cereale L., p.40
M. OKAMOTO:Mutation of a gene (or genes) for asynapsis and its use in plant breeding, p.43
Y. WATANABE:Meiotic abnormalities observed in some varieties of common wheat and occurrence of aneuploids, p.45
M. SASAKI:Aneuploidy and wheat-rye breeding, p.47
A. MOCHIZUKI:Agropyron addition lines of durum wheat, p.50
I. NISHIYAMA and S. ICHIKAWA:Radiobiological studies in plants, VII. Chromosome aberrations induced by gamma-irradiation in a Japanese wheat variety, p.53

III.
2nd INTERNATIONAL WHEAT GENETICS SYMPOSIUM, p.57

IV. Editorial Remarks
Correction, Page 9 of WIS No, 14, in the Article of Dr. J. Mac Key