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Analysis of HMW Glutenin Subunits Encoded by Chromosome 1A of Bread Wheat (Triticum Aestivum L.) Indicates Quantitative Effects on Grain Quality

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Publisher Springer
Specialty Genetics
Date 2013 Nov 9
PMID 24202521
Citations 42
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Abstract

A gene encoding the high-molecular-weight (HMW) subunit of glutenin 1Ax1 was isolated from bread wheat cv Hope. Comparison of the deduced amino acid sequence with that previously reported for an allelic subunit, 1Ax2(*), showed only minor differences, which were consistent with both subunits being associated with good bread-making quality. Quantitative analyses of total protein extracts from 22 cultivars of bread wheat showed that the presence of either subunit 1Ax1 or 1Ax2(*), when compared with a null allele, resulted in an increase in the proportion of HMW subunit protein from ca. 8 to 10% of the total. It is suggested that this quantitative increase in HMW subunit protein may account for the association of 1Ax subunits with good quality.

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