High-molecular-weight (HMW) glutenin subunit composition of the Elite-II synthetic hexaploid wheat subset (Triticum turgidum × Aegilops tauschii; 2n = 6x = 42; AABBDD)

Abstract

High-molecular-weight (HMW) glutenin subunit composition of the Elite-II synthetic hexaploid wheat subset (Triticum turgidum 3 Aegilops tauschii; 2n 5 6x 5 42; AABBDD) Abstract Characterization of high-molecular-weight (HMW) glutenins is an important criterion for identifying genotypes with good bread-making quality. In synthetic hexaploids (SHs), the D-genome encodes several allelic variants of HMW glutenins that require proper identification prior to their utilization for bread wheat (BW) improvement. In this study, SHs with promising agronomic features were characterized for HMW glutenin composition. Seven different allelic variants were observed at the Glu-D t 1 locus, three of which (1Dx1.5 þ 1Dy10, 1Dx1.5 þ 1Dy12.2 and 1Dx2.1 þ 1Dy10) have not been previously reported in existing BW germplasm. The results also showed a variety of D-genome-encoded subunits along with superior glutenin alleles in the B-genome (1Bx7 þ 1By8, 1Bx6 þ 1By8 and 1Bx13 þ 1By16). About 63% of these SHs encoded favourable allelic variants of HMW glutenins, which make them a good choice for improvement in wheat bread making. Glu-D t 1 encoded favourable allelic variants (1Dx5 þ 1Dy10 and 1Dx1.5 þ 1Dy10) that are frequently observed in SHs can be easily incorporated into BW through recombination breeding. Experimental Plant materialThe Elite-II subset studied is comprised of 33 primary synthetic hexaploid wheats. These synthetic hexaploids (SHs) were derived from the combinations of 14 durum wheats

Genetic Diversity for Wheat Improvement as a Conduit to Food Security

“…The narrow allelic diversity for Glu-A1 locus in bread and durum wheat, which encodes limited number of x-type subunits and does not express an active y-type subunit, requires attention to expand it by using novel allelic variants reported by several workers in T. urartu and T. monococcum (Alvarez et al, 2009;Caballero et al, 2008;Gutierrez et al, 2011;Waines and Payne, 1987). tauschii and D genome synthetic hexaploids Bibi et al, 2012;Gianibelli et al, 2001a,b;Rasheed et al, 2012a,b;Rehman et al, 2008;Xu et al, 2010;Yan et al, 2003). tauschii and D genome synthetic hexaploids Bibi et al, 2012;Gianibelli et al, 2001a,b;Rasheed et al, 2012a,b;Rehman et al, 2008;Xu et al, 2010;Yan et al, 2003).…”

Phenolic Content and Antioxidant Capacity of Synthetic Hexaploid Wheats

“…tauschii accessions revealed the presence of 11 1Dx and eight 1Dy subunits, including the recently discovered ones [ 9 ]. At the Glu-Dt1 gene, seven different allelic variations were found, three of which (1Dx1.5 + 1Dy10, 1Dx1.5 + 1Dy12.2, and 1Dx2.1 + 1Dy10) have not previously been identified in bread wheat germplasm [ 10 ]. Synthetic hexaploid wheats with the Ae.…”