Molecular diversity and phylogenetic analyses of y-type high-molecular-weight glutenin promoters from different genomes in Triticeae
2010
Jiang, Qian-Tao | Wei, Yuming | Wang, Ji-Rui | Yan, Ze-Hong | Zheng, You-Liang
Sequence polymorphisms and phylogenetic relationships from different genomes of 25 diploid species in Triticeae (Poaceae) were evaluated by using the sequences of y-type high-molecular-weight glutenin promoter (y-HGP). The length of the amplified y-HGP sequences ranged from 845 to 915 base pairs (bp) in the 25 species of Triticeae. Multiple sequence alignment showed conserved and variable parts in the y-HGP sequences. Higher sequence conservation was detected in the regulatory elements of y-HGP. An 85-bp deletion was found in eight species of Triticum, Aegilops, and Hordeum. Several species-specific indels were identified in the y-HGP from Psathyrostachys, Hordeum, and Pseudoroegneria. Maximum parsimony (MP) and Bayesian analyses defined an Aegilops/Triticum group consisting of closely related species. A close relationship between Pseudoroegneria and the clade of Australopyrum, Dasypyrum, and Agropyron was also strongly supported in the topologies of MP and Bayesian trees. As y-HGP has sufficient amounts of genetic variation and is a single-copy region in diploid Triticeae, it is useful in phylogenetic analyses of this group.
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