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GrainGenes Reference Report: TAG-108-1221

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Reference	TAG-108-1221
Title	Chromosomal location of genes for novel glutenin subunits and gliadins in wild emmer wheat (Triticum turgidum L. var. dicoccoides)
Journal	Theoretical and Applied Genetics
Year	2004
Volume	108
Pages	1221-1228
Author	Xu SS Khan K Klindworth DL Faris JD Nygard G
Abstract	Summary: The glutenin and gliadin proteins of wild emmer wheat, Triticum turgidum L. var. dicoccoides, have potential for improvement of durum wheat (T. turgidum L. var. durum) quality. The objective of this study was to determine the chromosomes controlling the high molecular weight (HMW) glutenin subunits and gliadin proteins present in three T. turgidum var. dicoccoides accessions (Israel-A, PI-481521, and PI-478742), which were used as chromosome donors in Langdon durum- T. turgidum var. dicoccoides (LDN-DIC) chromosome substitution lines. The three T. turgidum var. dicoccoides accessions, their respective LDN-DIC substitution lines, and a number of controls with known HMW glutenin subunits were analyzed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), urea/SDS-PAGE, and acid polyacrylamide gel electrophoresis (A-PAGE). The results revealed that all three T. turgidum var. dicoccoides accessions possess Glu-A1 alleles that are the same as or similar to those reported previously. However, each T. turgidum var. dicoccoides accession had a unique Glu-B1 allele. PI-478742 had an unusual 1Bx subunit, which had mobility slightly slower than the 1Ax subunit in 12% SDS-PAGE gels. The subunits controlled by chromosome 1B of PI-481521 were slightly faster in mobility than the subunits of the Glu-B1n allele, and the 1By subunit was identified as band 8. The 1B subunits of Israel-A had similar mobility to subunits 14 and 16. The new Glu-B1 alleles were designated as Glu-B1be in Israel-A, Glu-B1bf in PI-481521, and Glu-B1bg in PI-478742. Results from A-PAGE revealed that PI-481521, PI-478742, and Israel-A had eight, 12, and nine unique gliadin bands, respectively, that were assigned to specific chromosomes. The identified glutenin subunits and gliadin proteins in the LDN-DIC substitution lines provide the basis for evaluating their effects on end-use quality, and they are also useful biochemical markers for identifying specific chromosomes or chromosome segments of T. turgidum var. dicoccoides
External Databases	Pubmed: 14727030
Keyword	[ Hide all but 1 of 41 ] 1b a-page accessions biochemical-characterization chromosomal location chromosome chromosome substitution control dicoccoides durum electrophoresis emmer wheat gels gene glutenin hmw glutenin hmw glutenin subunits improvement inheritance polyacrylamide gel electrophoresis polyacrylamide-gel-electrophoresis polymorphism polypeptide quality sds page sodium sodium dodecyl sulfate specific substitution substitution line subunit sulfate tetraploid wheat triticum triticum turgidum triticum turgidum l turgidum unique wild wild emmer wild emmer wheat

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