Catalogue of Gene Symbols for Wheat: 1986 Supplement
R. A. MCINTOSH
The University of Syndney, Plant Breeding Institude, P.O. Box 180, Castle Hill, N.S.W., Australia, 2154
Reprints of the 1983 edition: Proc. 6th Int. Wheat Genetics Symposium. Kyoto, Japan, pp. 1197-1254 and the 1984 supplement are still available. Assistance from Dr. G.E. Hart (U.S.A.) and Dr. M. D. Gale (U. K.) with preparation of the Nucleolus Organiser Region and Protein sections is gratefully acknowledged.
Anthocyanin Pigmentation
Rye apparently possesses a gene giving progressive necrosis when crossed with wheat cv. Siesta I (617). Assuming that Siesta I (CS/Tobari 66) possesses Ne2m (249) then the gene in rye simulates Nel. A gene, Ner' was identified in a triticale with known parents. This ryederived gene simulated Ne2 (618).
Different alleles for the Ch2 gene in C306 (strong) and Sonalika (medium) were suggested (616).
NORs have been observed as secondary constrictions associated with nucleoli on satellited chromosomes (e.g. 711), by hybridisation in situ to chromosome preparations of 18S-5.8S-26S DNA (rDNA) probes (718), and by hybridisation of rDNA probes to endonucleasetreated DNA on Southern blots (720, 719). The latter method allows detection of 'allelic' variation at NOR loci. Variation has been demonstrated at Nor-B1 and Nor-B2 (721, 543). Intervarietal 'allelic' variation in gene number has been demonstrated by variation in density of in situ label at all wheat NOR genes and at Nor-R1 (727).
A single 5S rRNA hybridisation site was observed in barley. The chromosome involved was not 5H or 6H, identified by the presence of secondary constrictions (713).