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Molecular characterization and phylogenetic analysis of active y-type high molecular weight glutenin subunit genes at Glu-A1 locus in wheat

Yu, Z., Peng, Y., Islam, S., She, M., Lu, M., Lafiandra, D., Roy, N., Juhász, A., Yan, G. and Ma, W. (2019) Molecular characterization and phylogenetic analysis of active y-type high molecular weight glutenin subunit genes at Glu-A1 locus in wheat. Journal of Cereal Science, 86 . pp. 9-14.

Link to Published Version: https://doi.org/10.1016/j.jcs.2019.01.003
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Abstract

An increased number of high molecular weight glutenin subunits (HMW-GSs) is advantageous to the formation of glutenin macropolymer, the major determinant of end-product quality. Out of the six HMW-GS genes, Glu-1Ay is typically inactive in most hexaploid wheat cultivars. In the current study, we characterized two active Glu-1Ay genes Glu-1AyN11 and Glu-1AyC422 from a hexaploid wheat cultivar N11 and a durum wheat cultivar C422, respectively. The molecular masses of the 1Ay subunit of N11 (Glu-1AyN11) and C422 (Glu-1AyC422) were 61.1 kDa and 63.9 kDa, respectively, measured by matrix-assisted laser desorption/ionization time of flight mass spectrometry. Molecular characterization of Glu-1AyN11 and Glu-1AyC422 showed their complete coding regions were 1764 bp and 1827 bp in length, respectively. The deduced amino acid sequence of both Glu-1AyN11 and Glu-1AyC422 has a similar typical primary structure as the other y-type HMW-GSs, but in comparison to Glu-1By and Glu-1Dy subunits, the Glu-1Ay subunit has one less conserved cysteine residue in the repetitive domain. Phylogenetic analysis revealed that the inactive Glu-1Ay had a closer evolutionary relationship with Glu-1AyC422 than with Glu-1AyN11. The divergence time among Glu-1AyN11, Glu-1AyC422, and other y-type subunit genes was also estimated.

Publication Type: Journal Article
Murdoch Affiliation: Western Australian State Agricultural Biotechnology Centre
School of Veterinary and Life Sciences
Publisher: Academic Press
Copyright: © 2019 Elsevier Ltd.
URI: http://researchrepository.murdoch.edu.au/id/eprint/43361
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