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    Abstract
2010 (Vol. 2, Issue: 4)
Article Information:

Sequence Analysis of α-gliadin Genes from Aegilops tauschii Native to China

Guangrong Li, Tao Zhang, Pei Wei, Juqing Jia and Zujun Yang
Corresponding Author:  Zujun Yang 

Key words:  Aegilops tauschii, α-gliadin, evolutionary analysis, wheat breeding, , ,
Vol. 2 , (4): Page No: 128-135
Submitted Accepted Published
2010 June, 07 2010 July, 03 2010 October, 09
Abstract:

Aegilops tauschii was a D-genome progenitor for cultivated wheat (Triticum aestivum L). The accessions of Ae. tauschii native to China contained novel agronomically important traits including unique seed storage proteins for modern wheat improvement. Total 19 α-gliadin gene sequences were isolated from Ae. tauschii accession from Henan province. Five of 19 sequences contained in-frame stop condons and were predicted to be pseudogenes, suggesting the high variation of gliadin genes in Ae. tauschii genome. The Open Reading Frame (ORF) lengths of these sequences encoded 281-303 residues, with the repetitive polyglutamine from 17-28 residues. There are two α-gliadin sequences present either 5 or 7 cysteine residues, which possibly related to high quality. Four peptides of T cell stimulatory epitopes in Celiac Disease (CD ) patients were distributed in most Ae. tauschii α-gliadin gene sequences. In comparison with the reported α-gliadin sequences in wheat ancestral species, the sequences of Ae. tauschii displayed high haplotypes diversity and significant deviation from a neutral distribution, indicative of the fast evolution of α-gliadin genes in Ae. tauschii species.
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  Cite this Reference:
Guangrong Li, Tao Zhang, Pei Wei, Juqing Jia and Zujun Yang, 2010. Sequence Analysis of α-gliadin Genes from Aegilops tauschii Native to China.  Asian Journal of Agricultural Sciences, 2(4): Page No: 128-135.
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ISSN (Online):  2041-3890
ISSN (Print):   2041-3882
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