Molecular phylogeny of RPB2 gene reveals multiple origin, geographic differentiation of H genome, and the relationship of the Y genome to other genomes in Elymus species

Sun, Genlou; Ni, Yaodong; Daley, Tracy

doi:10.1016/j.ympev.2007.12.024

Cited by 79 publications

(67 citation statements)

References 43 publications

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“…North American Elymus allotetraploids include St-(Pseudoroegneria) and H (Hordeum)-genomic components (MasonGamer, 2001(MasonGamer, , 2013. Phylogenetic and cytogenetic analyses of Asian Elymus species showed that the putative parental genomes were from Pseudoroegneria (St-genome), Hordeum (H-genome), Agropyron (P-genome), Australopyrum (W-genome), and an unknown species (Y-genome) (Sun et al, 2008). However, in this study, Elymus species only contained St-, H-, and Y-genomes based on cytological evidence.…”

Section: Results and Discussion Nrits Treecontrasting

confidence: 57%

“…Pseudoroegneria and the StY Elymus genome did not resolve as closely related (Figure 1). In addition, studies on the single copy nuclear β-amylase gene (Mason-Gamer et al, 2005), DNA polymerase subunit II (RPB2) sequences (Sun et al, 2008), and elongation factor G (EF-G) sequence data (Yan et al, 2011) have suggested that the Elymus Y-genome originated in an independent Y diploid species that is now extinct or undiscovered. However, Fan et al (2013) suggested that the Elymus Y-genome is closely related to the Peridictyon sanctum (Xp -genome) based on single-copy nuclear acetyl-coa carboxylase-1 (Acc1) and phosphoglycerate kinase -1 (Pgk1) gene sequences.…”

Section: Results and Discussion Nrits Treementioning

confidence: 99%

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Phylogenetic analysis of Elymus (Poaceae) in western China

2015

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ABSTRACT. Elymus L. is often planted in temperate and subtropical regions as forage. Species in the genus have 5 allopolyploid genomes that are found in the grass tribe Triticeae. To determine the phylogenetic relationships in Elymus species from western China, we estimated phylogenetic trees using sequences from the nuclear ribosomal internal transcribed spacer and non-coding chloroplast DNA sequences from 56 accessions (871 samples) of 9 polyploid Elymus species and 42 accessions from GenBank. Tetraploid and hexaploid Elymus species from western China had independent origins, and Elymus species from the same area or neighboring geographic regions were the most closely related. Based on the phylogenetic tree topology, the St-and Y-genomes were not derived from the same donor and Y-genome likely originated from the H-genome of Hordeum species, or they shared the same origin or underwent introgression. The maternal genome of tetraploid and hexaploid Elymus species originated from species of Hordeum or Pseudoroegneria.

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Section: Results and Discussion Nrits Treecontrasting

confidence: 57%

Section: Results and Discussion Nrits Treementioning

confidence: 99%

Phylogenetic analysis of Elymus (Poaceae) in western China

2015

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“…A study based on the waxy gene indicated that St sequences formed two distinct clades which did not correspond to geographical differentiation (MasonGamer and Kellogg 2000). RPB2 sequence data showed that the St genome in P. libanotica is differentiated from the St genome in P. spicata and P. stipifolia, and did not contradict the idea of paraphyly in Pseudoroegneria (Sun et al 2008). RPB2 results also suggest that P. spicata and P. stipifolia may be the St genome donor for Elymus species, P. libanotica may therefore not be the St genome donor of the Elymus species studied (Sun et al 2008).…”

Section: The Tetraploid Elymus Species With Sth Genomementioning

confidence: 83%

“…RPB2 data generated an obvious Y genome specific clade which is distinct from the St clade. Phylogenetic analysis of Y genome sequences with other genome donors (St, H, P, W) of Elymus revealed W and P genomes are sisters to Y genome (Sun et al 2008). It is worth mentioning that the obvious Y genome specific clade is distinct from the St clade (Fig.…”

Section: The Tetraploid Elymus Species With Sty Genomementioning

confidence: 93%

Molecular evolution and origin of tetraploid <i>Elymus</i> species

Sun

Salomon

2009

Breed. Sci.

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“…The genus Elymus is the largest, most widely distributed, and also the most morphologically diverse genus in the Triticeae with approximately 150 species, all of which are allopolyploids, containing at least one St haplome (Dewey, 1984;Okito, Mott, Wu & Wang, 2009;Sun, Ni, & Daley, 2008;. Cytological analyses have shown that there are five basic genomes within Elymus (St, H, P, W, and Y).…”

Section: 3-relationship Of Elymus and Pseudoroegneriamentioning

confidence: 99%

Phylogenetic analysis of the genus Pseudoroegneria and the Triticeae tribe using the rbcL gene

Gamache

Sun

2015

Biochemical Systematics and Ecology

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Phylogenetic Analysis of the Genus Pseudoroegneria and the Triticeae Tribe Using the rbcl Gene By Jacques GamachePseudoroegneria are diploid perennial grasses of the Triticeae tribe. The haplome "St" of Pseudoroegneria is shared with several important polyploid species such as Elymus, Kengyilia and, Elytrigia. Due to frequent hybridizations and complex genetic mechanisms, the relationships within Pseudoroegneria, and within the Triticeae, have been heavily disputed. Using the chloroplast rbcL gene I estimated the nucleotide diversity of 8 Pseudoroegneria species, and additionally examined the phylogenetic relationships within Pseudoroegneria and of Pseudoroegneria within the larger context of Triticeae. The estimates of nucleotide diversity indicated that P. tauri and P. spicata species had the highest diversity, while P. gracillima had the lowest. The phylogenetic analysis of Pseudoroegneria placed all P. spicata sequences into a clade separate from the other Pseudoroegneria, while the relationship of the other Pseudoroegneria species could not be determined. Due to the groupings of Pseudoroegneria with the polyploid Elymus, our results strongly support Pseudoroegneria as the maternal genome donor to Elymus. There was also weak support for the idea that P. spicata may be the maternal genome donor to the StH Elymus species.

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Molecular phylogeny of RPB2 gene reveals multiple origin, geographic differentiation of H genome, and the relationship of the Y genome to other genomes in Elymus species

Cited by 79 publications

References 43 publications

Phylogenetic analysis of Elymus (Poaceae) in western China

Phylogenetic analysis of Elymus (Poaceae) in western China

Molecular evolution and origin of tetraploid <i>Elymus</i> species

Phylogenetic analysis of the genus Pseudoroegneria and the Triticeae tribe using the rbcL gene

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