Allelic variation for the high- and low-molecular-weight glutenin subunits in wild diploid wheat (Triticum urartu) and its comparison with durum wheats
L. Caballero A , M. A. Martín A and J. B. Alvarez A BA Departamento de Genética, Escuela Técnica Superior de Ingenieros Agrónomos y de Montes, Edificio Gregor Mendel, Campus de Rabanales, Universidad de Córdoba, ES-14071 Córdoba, Spain.
B Corresponding author. Email: jb.alvarez@uco.es
Australian Journal of Agricultural Research 59(10) 906-910 https://doi.org/10.1071/AR08065
Submitted: 20 February 2008 Accepted: 16 July 2008 Published: 18 September 2008
Abstract
Triticum urartu is a wild diploid wheat identified as donor of the A genome in polyploid wheats. This species could be used as a genetic resource for wheat quality breeding. The HMWGs and B-LMWGs of this species were analysed by SDS-PAGE in 169 accessions from Armenia, Iran, Iraq, Lebanon, the former Soviet Union, and Turkey. Seventeen alleles for the Glu-Au1 locus and 24 for the Glu-Au3 locus were found. The allelic variation was asymmetrically distributed, Turkey being the country where the largest number of alleles was found. Genetic diversity was high, although a great part of this diversity is at risk of erosion given that the distribution of the combinations among the evaluated accessions was not random. Consequently, the loss of these accessions could mean the disappearance of the allelic variants. The alleles found for both loci were different from those detected in cultivated wheats. These results provided new basic knowledge regarding the genetic variability of the seed storage proteins synthesised by the Au genome, as well as their potential to create novel germplasm for quality breeding in wheat programs.
Additional keywords: electrophoresis, genetic resources, glutenins.
Acknowledgments
This research was supported by grant AGL2007-65685-C02–02 from the Spanish Ministry of Education and Science and the European Regional Development Fund (FEDER) from the European Union. We thank to the National Small Grain Collection (Aberdeen, USA) and the Institute for Plant Genetics and Crop Plant Research (Gatersleben, Germany) for supplying the analysed material.
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