LINKAGE RELATIONSHIPS IN WILD EMMER WHEAT, TRITICUM DICOCCOIDES

Edward M. Golenberg ¹

¹ Department of Ecology and Evolution, State University of New York, Stony Brook, New York 11794, and Institute of Evolution, University of Haifa, Israel 31999

The linkage relationships in wild emmer wheat, Triticum dicoccoides , between nine enzymatic loci (Mdh-1, Ipo, ß-Glu, Pept-1, Pept-3, Est-5, Est-1, 6Pgdh-2 and Hk) and a coleoptile pigment locus (Rc) were investigated. Chromosome locations of genes were inferred from analysis of ditelocentric lines of Triticum aestivum, cultivar Chinese Spring. The loci Mdh-B1 and Hk are linked (lambda = 0.1869) and are most likely located on the chromosome 1B. The loci Pept-B1 and Rc are linked (lambda = 0.2758) and are located on the 6Bq chromosomal arm. Rc also has significant interactions with the loci Pept-3 and Ipo, although there is no significant linkage detectable. The interactions may be a result of epigenetic interactions. Est-1 has only one active product in T. dicoccoides and is most likely located on the 3Ap chromosome arm. No significant interactions were found for the remaining loci.