2nd International Triticeae Symposium
Richard R-C. Wang
Variation in high molecular weight glutenin subunit composition among 177 durum wheat genotypes, derived from a collection of durum wheat landraces from Jordan, was investigated using one-dimensional sqdium dodecyl sulphate polyacrylamide gel electrophoresis. A total of 22 alleles, in addition to the null allele, Glu-A I c, were identified; three and seven novel variants were identified at the Glu-A I and Glu-B I loci, respectively. The null allele, Glu-A I c, had the highest (7 6. I%) frequency, followed by Glu-B I b (34. 7% ). Two loci at the Glu-B I locus were lacking, these were Glu-B I c and Glu-B I i. Glu-A I b was present with low (6.7%) frequency in this collection, however, it might have a positive effect on gluten strength of the end products of durum wheat. Polymorphism (He) at the Glu-A I and Glu-B I loci averaged 0.261 0.04 and 0.7330.02, respectively. He for Glu-A I was negatively (r=-0.467; P) correlated, while He for Glu-B I was positively (r=0.615; P), correlated with altitude of collection site. However, both He estimates were positively and significantly correlated with rainfall quotient.
Jaradat, A. A. and Ajlouni, M. M., "Breeding Potential of Durum Wheat Landraces from Jordan IV. High Molecular Weight Glutenin Subunit Variation." (1994). Herbarium Publications. Paper 11.