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GrainGenes Reference Report: TAG-107-74

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Reference	TAG-107-74
Title	Characterisation and analysis of new HMW-glutenin alleles encoded by the Glu-R1 locus of Secale cereale
Journal	Theoretical and Applied Genetics
Year	2003
Volume	107
Pages	74-83
Author	De Bustos A Jouve N
Abstract	Summary: This work reports the molecular characterisation of new alleles of the previously reported Glu-R1 locus. Wheat lines carrying the chromosome substitution 1R(1D), rye cultivars and related wild species were analysed. Five new x-type and four y-type Glu-R1 glutenin subunits were isolated and characterised. The coding region of the sequences shows the typical structure of the HMW glutenin genes previously described in wheat, with the N and C-terminal domains flanking the central repetitive region. Tri-, hexa- and nona-peptides found in the central repetitive region of wheat glutenin genes were also present in the rye genes. Duplications and deletions of these motifs are responsible for allelic variation at the Glu-R1 locus. Orthologous genes (from different genomes) were more closely related than paralogous genes (x- and y-type), supporting the hypothesis of gene duplication before Triticeae speciation. Differences in the number and position of cysteine residues identified alleles which in wheat are associated with good dough quality. SDS proteins encoded by some characterised alleles were presumptively identified
External Databases	Pubmed: 12835934
Keyword	[ Hide all but 1 of 40 ] allele allelic allelic variation breadmaking quality chromosome chromosome substitution coding region cysteine cysteine residues difference dough dough quality duplication elasticity gene gene duplication glu-r1 glutenin glutenin gene high-molecular-weight-glutenin hmw glutenin inheritance locus molecular-basis nucleotide sequence orthologous genes position quality rye sds secale sequence speciation substitution subunit subunit gene triticeae wheat glutenin wheat lines wild

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