Maternal donors of polyploids in Pseudoroegneria (Poaceae: Triticeae) and related genera inferred from chloroplast trnL-F sequences

Authors : Yu HAIQING, Zhang CHUN, Ding CHUNBANG, Ma XIAO, Zhou YONGHONG

Pages : 335-342

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Publication Date : 2010-12-01

Article Type : Research Paper

Abstract :To investigate the maternal donors and phylogenetic relationships of polyploids in Pseudoroegneria and related genera, the chloroplast trnL-F sequences of 31 Triticeae accessions were analyzed. The substitution saturation analysis of trnL-F sequences in this study suggested that they are suitable for phylogenetic analysis. In the trnL-F sequences tree, 4 major clades were formed: insert ignore into journalissuearticles values(a); the St/E clade comprised all of the Pseudoroegneria species together with species in Roegneria, Elytrigia, Douglasdeweya and Lophopyrum; insert ignore into journalissuearticles values(b); A. cristatum, A. mongolicum, and A. pectinatum subsp. retrofractum formed the P/W clade; insert ignore into journalissuearticles values(c); the Ns clade included species in Psathyrostachys; and insert ignore into journalissuearticles values(d); the H clade consisted of Hordeum species. The results suggested that: insert ignore into journalissuearticles values(a); diploid Pseudoroegneria species were the maternal donors of St-containing polyploid species in Pseudoroegneria, Roegneria, Douglasdeweya, and Elytrigia, and the trnL-F sequences were highly similar among them; insert ignore into journalissuearticles values(b); the trnL-F sequences of Agropyron species and Australopyrum species were similar, and the P genome was closely related to the W genome; and insert ignore into journalissuearticles values(c); the trnL-F sequences of species with the H or Ns genomes diverged greatly from that of species with the St, E, P, or W genomes.
Keywords : Key words Pseudoroegneria, Douglasdeweya, Roegneria, Elytrigia, chloroplast trnL F