High molecular weight glutenin subunit variation in Triticum turgidum var. dicoccum

Variation in high molecular weight (HMW) glutenin subunit composition among 167 accessions of dicoccum wheat (Triticum turgidum L. var. dicoccum Schrank) of diverse origins was investigated using one-dimensional sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE). A total of 20 all...

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Bibliographic Details
Published in:Theoretical and applied genetics 1987-10, Vol.74 (6), p.706-710
Main Authors: Vallega, V. (Istituto Sperimentale per la Cerealicoltura, Roma (Italy). Section of Applied Genetics), Waines, J.G
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
Classical and quantitative genetics. Population genetics. Molecular genetics
Fundamental and applied biological sciences. Psychology
Generalities. Genetics. Plant material
Genetics and breeding of economic plants
GLUTENINAS
GLUTENINE
GLUTENINS
HEREDITE
HERENCIA (GENETICA)
INHERITANCE (GENETICS)
TAXONOMIA
TAXONOMIE
TAXONOMY
TRITICUM TURGIDUM
Varietal selection. Specialized plant breeding, plant breeding aims
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Summary:Variation in high molecular weight (HMW) glutenin subunit composition among 167 accessions of dicoccum wheat (Triticum turgidum L. var. dicoccum Schrank) of diverse origins was investigated using one-dimensional sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE). A total of 20 alleles were identified, and 9 of them were found to be different from those previously detected by Payne and Lawrence (1983 b) in hexaploid wheat (Triticum aestivum L.). The newly discovered alleles enhance the genetic variability available to improve the industrial quality of wheats and some of them may facilitate basic research on the relationship of industrial quality with HMW glutenin subunit number. The novel variants include a GLU-A1 encoded subunit which has higher molecular mass than any other so far described in tetraploid and hexaploid wheats, and a 'null' GLU-B1 allele. Dicoccums containing neither GLU-A1- nor GLU-B1-encoded subunits were also identified. A comparison of the mean number of HMW glutenin subunits contained in various primitive and modern domesticated wheats of different ploidy levels and the identification of wheats containing no HMW glutenin subunits suggest that the occurrence of 'null' GLU-1 alleles in these species depends on chance rather on an inherent tendency on the part of modern polyploid wheats to suppress the activity of redundant GLU-1 genes.
ISSN:0040-5752
1432-2242
DOI:10.1007/bf00247545