Abstract
High-molecular-weight glutenin subunits (HMW-GSs) are important seed storage proteins associated with bread-making quality in common wheat (Triticum aestivum L., 2n = 6x = 42, AABBDD). Variation in the Glu-A1x locus in common wheat is scare. Diploid Triticum monococcum ssp. monococcum (2n = 2x = 14, AmAm) is the first cultivated wheat. In the present study, allelic variations at the Glu-A1mx locus were systematically investigated in 197 T. monococcum ssp. monococcum accessions. Out of the 8 detected Glu-A1mx alleles, 5 were novel, including Glu-A1m-b, Glu-A1m-c, Glu-A1m-d, Glu-A1m-g, and Glu-A1m-h. This diversity is higher than that of common wheat. Compared with 1Ax1 and 1Ax2*, which are present in common wheat, these alleles contained three deletions/insertions as well as some single nucleotide polymorphism variations that might affect the elastic properties of wheat flour. New variations in T. monococcum probably occurred after the divergence between A and Am and are excluded in common wheat populations. These allelic variations could be used as novel resources to further improve wheat quality.
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This research was supported by the National Natural Science Foundation of China (31271723, 31201210), Sichuan Provincial Youth Fund (2011JQ0016), and the Scientific Research Foundation of the Education Department of Sichuan Province (14ZA0012).
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Li, H.Y., Li, Z.L., Zeng, X.X. et al. Molecular Characterization of Different Triticum monococcum ssp. monococcum Glu-A1mx Alleles. CEREAL RESEARCH COMMUNICATIONS 44, 444–452 (2016). https://doi.org/10.1556/0806.44.2016.006
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DOI: https://doi.org/10.1556/0806.44.2016.006