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

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Biologia Plantarum

Abstract

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.

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Abbreviations

cpDNA:

chloroplast DNA

E. :

Elymus

H. :

Hordeum

Hor. :

Hordelymus

Lop. :

Lophopyrum

P :

Pseudoroegneria

Psa :

Psathyrostachys

RAPD:

random amplified polymorphic DNA

T. :

Taeniatherum

Th :

Thinopyrum

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Acknowledgements

This research was supported with grants from NSERC, a Senate Research Grant at Saint Mary’s University. Thanks go to Dr. Björn Salomon at the Swedish University of Agricultural Science, Regional Plant Introduction Station, USDA, Nordic Genetic Resource Center and Plant Gene Resources of Canada for kindly supplying the seeds used in this study.

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Authors and Affiliations

  1. Biology Department, Saint Mary’s University, Halifax, Nova Scotia, B3H 3C3, Canada

    Y. Ni, N. Asamoah-Odei & G. Sun

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  1. Y. Ni
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  2. N. Asamoah-Odei
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  3. G. Sun
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Correspondence to G. Sun.

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

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  • DOI: https://doi.org/10.1007/s10535-011-0009-7

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