Isolation and phylogenetic analysis of novel gamma-gliadin genes in genus Dasypyrum
文献类型: 外文期刊
第一作者: Liu, C.
作者: Liu, C.;Yang, Z. J.;Yang, E. N.
作者机构:
关键词: Dasypyrum;gamma-gliadin genes;Phylogenetic analysis
期刊名称:GENETICS AND MOLECULAR RESEARCH ( 影响因子:0.764; 五年影响因子:0.912 )
ISSN: 1676-5680
年卷期: 2013 年 12 卷 1 期
页码:
收录情况: SCI
摘要: As the most ancient member of the wheat gluten family, the gamma-gliadin genes are suitable for phylogenetic analysis among wheat and related species. Species in the grass genus Dasypyrum have been widely used for wheat cross breeding. However, the genomic relationships among Dasypyrum species have been little studied. We isolated 22 novel gamma-gliadin gene sequences, among which 10 are putatively functional. The open reading frame lengths of these sequences range from 642 to 933 bp, and these putative proteins consist of five domains. Phylogenetic analyses showed that all Dasypyrum gamma-gliadin gene sequences clustered in a large group; D. villosum and tetraploid D. breviaristatum gamma-gliadin gene sequences clustered in a subgroup, while diploid D. breviaristatum gamma-gliadin gene sequences clustered at the edge of the subgroup. All of the Dasypyrum gamma-gliadin gene sequences were absent in three major T cell-stimulatory epitopes binding to HLA-DQ2/8 in celiac disease patients. Based on the phylogenetic analyses, we suggest that D. villosum and tetraploid D. breviaristatum evolved in parallel from a diploid ancestor D. breviaristatum.
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