Wheat Information Service No.30 Wheat Information Service No.30



Contents

I. Research Notes:
H. KIHARA and M. TANAKA:Addendum to the classification of the genus Aegilops by means of genome-analysis, p.1
K. TSUNEWAKI:A proposal for the designation of nucleus-substitution lines and fertility-restoring genes in wheat, p.2
S. AVANZI, A. BRUNORI and F. D'AMATO:Nuclear conditions in the meristems of resting seeds of Triticum durum, p.5
R. MORRIS, J. W. SCHMIDT and V. A. JOHNSON:Association of homoeologous group 6 aneuploids with leaf necrosis in hexaploid wheat varieties, p.6
A. FOSSATI and M. INGOLD:A male sterile mutant in Triticum aestivum, p.8
B. C. JOSHI, R. N. SAWHNEY, D. SINGH and S. KUMAR:Wheat chromosomes controlling regular bipolar segregation of homologous chromosomes and integrity of the centromere, p.10
T. MAKINO:On the location of the asynaptic gene in wheats, p.12
H. K. JAIN, R. N. SAWHENY, D. SINGH and B. C. JOSHI:Induction of earliness and grain color mutation in wheat variety Nadadores, p.13
S. ICHIKAWA:The RBE of 14.1 MeV fast neutrons and 137Cs gamma rays in the pre-soaked seeds of Triticum boeoticum and its autotetraploid, p.14
W. GOTTSCHALK and M. IMAM:The relations between radiation susceptibility, mutation frequency, and level of ploidy in the genus Triticum, p.15
Y. FURUTA:DNA content per nucleus in Aegilops species, p.20
H. K. JAIN and P. K. DAS:Nucleic acid synthesis and adaptation in wheat, p.22
C. M. TAHIR:Production of male-sterile and restoration lines of Pakistani wheat varieties with Ae. ovata and T. timopheevi cytoplasms, p.23
J. SCHULZ-SCHAEFFER:The Triticum x Agropyron hybridization project at Montana State University, p.26
R. S. ATHWAL and G. KIMBER:Anther size and pollen longevity in wheat/rye addition lines, p.30

II. News:
The Program of the Botanical Expedition to the Northern Highland of Mesopotamia (B. E. M.), Kyoto University, Japan, 1970, p.33
The Death of Dr. I. UCHIKAWA, p.34

III. Editorial Remarks:
Announcement for future issues, p.35
Subscription, p.35
Acknowledgement, p.35
Coordinating Committee, ...iii
Explanation of the Figure on the Cover, ...iii

IV. General Table of Contents of WIS Nos. 21-30, ...S-1