Abstract
More and more low-molecular-weight glutenin(LMW glutenin) genes were isolated and characterized from hexaploid wheat (Triticum aestivum L.). However, few homologous genes were obtained from its relative species, which limited our understanding of the relationships among them. Therefore, it is necessary to isolate LMW glutenin homologous genes from wheat wild relative species. Using a pair of specific oligonucleotide PCR primers for Taenitherum genomic DNA, a LMW glutenin gene sequence, with nucleotide sequence in 1 035 bp and deduced amino acid sequence with 343 amino acid residues, was obtained. This sequence was a typical LMW glutenin sequence and characterized by a signal peptide of 21 amino acid residues, a N-terminal conservative domain of 13 amino acid residues, a repetitive domain of short peptide, and a C-terminal conservative domain. Sequence alignment showed the main differences and the relationships between LMW glutenin genes from wheat and Taenitherum. The results presented here give a reference to isolate LMW glutenin gene from Taenitherum, as well as other wheat wild relatives.
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