Biologia plantarum 55:68-74, 2011 | DOI: 10.1007/s10535-011-0009-7

Maternal origin, genome constitution and evolutionary relationships of polyploid Elymus species and Hordelymus europaeus

Y. Ni1, N. Asamoah-Odei1, G. Sun1,*
1 Biology Department, Saint Mary's University, Halifax, Canada

The trnS/psbC region of chloroplast DNA (cpDNA) was sequenced for 18 Elymus polyploid species, Hordelymus europaeus and their putative diploid ancestors. The objective was to determine the maternal origin and evolutionary relationships of these polyploid taxa. Phylogenetic analysis showed that Elymus and Pseudoroegneria species formed a highly supported monophyletic group (100 % bootstrap values), suggesting that Pseudoroegneria is the maternal genome donor to polyploid Elymus species studied here. The phylogenetic tree based on cpDNA sequence data indicates that E. submuticus contains a St-genome. Taking into consideration of our previously published RPB2 data, we can conclude that hexaploid E. submuticus contains at least one copy of St and Y genomes. Our Neighor-joining analysis of cpDNA data put Psathyrostachys juncea, Hordeum bogdanii and Hordelymus europaeus into one group, suggesting a close relationship among them.

Keywords: Hordeum; Psathyrostachys; Pseudoroegneria; RAPD; Taeniatherum

Received: August 7, 2009; Accepted: January 15, 2010; Published: March 1, 2011Show citation

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Ni, Y., Asamoah-Odei, N., & Sun, G. (2011). Maternal origin, genome constitution and evolutionary relationships of polyploid Elymus species and Hordelymus europaeus. Biologia plantarum, 55(1), 68-74. doi: 10.1007/s10535-011-0009-7.
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