Molecular phylogenetic relationships inAveneae (Poaceae) species and other grasses as inferred from ITS1 and ITS2 rDNA sequences

Grebenstein, Bärbel; Röser, Martin; Sauer, Wilhelm; Hemleben, Vera

doi:10.1007/bf00985203

Cited by 67 publications

(60 citation statements)

References 35 publications

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“…8), in agreement with previous findings based on ITS1/ITS2 sequences of 18S-5.8S-25S rDNA (Grebenstein et al, 1998) and on morphological and anatomical characters (Röser, 1989(Röser, , 1996(Röser, , 1998Lange, 1995). Relationships within Helictotrichon subg.…”

Section: Relationships Within Helictotrichon Subg Pratavenastrumsupporting

confidence: 93%

“…8). This is in accordance with the results from the study of the internal transcribed spacers (ITS1/ITS2) of the 18S-5.8S-25S rDNA (Grebenstein et al, 1998). Furthermore, H. desertorum, which has been considered a member of subg.…”

Section: Molecular Phylogenetic and Higher-level Systematic Implicationssupporting

confidence: 89%

“…This surprising result (Fig. 8) matches the findings obtained previously in the analyses of the spacer sequences of 18S-5.8S-25S rDNA (Grebenstein et al, 1998).…”

supporting

confidence: 93%

See 2 more Smart Citations

Molecular Diversity and Physical Mapping of 5S rDNA in Wild and Cultivated Oat Grasses (Poaceae: Aveneae)

Röser

Winterfeld

Grebenstein

et al. 2001

Molecular Phylogenetics and Evolution

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Section: Relationships Within Helictotrichon Subg Pratavenastrumsupporting

confidence: 93%

Section: Molecular Phylogenetic and Higher-level Systematic Implicationssupporting

confidence: 89%

See 1 more Smart Citation

Molecular Diversity and Physical Mapping of 5S rDNA in Wild and Cultivated Oat Grasses (Poaceae: Aveneae)

Röser

Winterfeld

Grebenstein

et al. 2001

Molecular Phylogenetics and Evolution

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“…The sub-ordinate groups 1 and 2 were resulted from the first major group A, while the sub-ordinate group 3 was resulted from the second major group B, but the sub-ordinate groups 4 and 5 were resulted from the third major group C (Fig. 1) has remained largely problematic, some taxonomic treatments related to the avenoids have focused on particular genera, like Trisetum (Edgar, 1998;Randall and Hilu, 1986), Helictotrichon (Grebenstein et al, 1998), Avena (El-Rabey, 2008;Peng et al, 2010;Rodionov et al, 2005), Deschampsia (Chiapella, 2007), Anthoxanthum (Pereira et al, 2007), Alopecurus (Dogan, 1999), Phleum (Scholz, 1999), and Calamagrostis (Hai-Ying et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Taxonomic Significance of Glume Morphology and Leaf Epidermal Characteristics in some Taxa of Tribe Aveneae (Poaceae)

2013

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The numerical classification of tribe Aveneae (Poaceae) is discussed regarding the glume morphology and silica skeleton morphologies. The present study dealt with 18 species belonging to 10 genera of the tribe to cover as many groups as possible within Aveneae. The total of 31 structural characters and 71 character states were scored comparatively. The resulted data matrix was analyzed under a combination of Euclidean distance measure and Ward's clustering method included in the program package PC-ORD version 5. The resulted dendrogram separated the tribe into five basic sub-ordinate groups created from three major groups A, B and C. The taxonomic significance of these results was discussed. The results showed congruence between the clustering and PCA method, in suggesting three major groups and 5 sub-ordinate groups.

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“…However, none of the species complexes distinguished within Helictochloa could be resolved in the molecular phylogenetic studies conducted so far. Analyses of nuclear ribosomal DNAs (rDNAs) [Grebenstein et al, 1998;Röser et al, 2001] suggested for the east Mediterranean to Asian distributed diploid H. aetolica , H. versicolor and H. compressa phylogenetically basal positions within the genus. For polyploid taxa, the presence of multiple DNA copies, maybe due to a low number of taxa and selected clones (copies), was not convincingly shown to date, and relationships based on molecular data remained widely unclear.…”

Section: Introductionmentioning

confidence: 99%

Polyploidy and Hybridization as Main Factors of Speciation: Complex Reticulate Evolution within the Grass Genus <b><i>Helictochloa</i></b>

Winterfeld

Schneider

Perner

et al. 2014

Cytogenet Genome Res

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To study the origin and evolution of naturally occurring polyploids, we performed phylogenetic analyses of nuclear ribosomal DNA spacers combined with molecular cytogenetics in 55 accessions of 27 taxa of the oat genus Helictochloa. A complex pattern of reticulate evolution was revealed with many diploid species and extensive polyploidy up to 20x. Altogether 11 groups of internal transcribed spacer (ITS) sequences can be distinguished. Sequences from 1-3 different ITS lineages were detected in polyploids. Cytogenetic data allow reconstruction of 8 basic monoploid chromosome sets. Six of these genomes occur in different combinations in the polyploid species. Two genomes are only found in diploids. Our sequence and karyological data highlight the occurrence of autopolyploidy and allopolyploidy, provide new information about the evolutionary history of taxa, and allow a more accurate systematic treatment of the concerned species. The geographical distribution of the 11 ITS lineages distinguished is highly structured and points to an origin of the genus in western Asia, presumably in grasslands like steppes or mountain steppes and meadows. The evolutionary basal lineages are of Asian, Minor Asian and east Mediterranean distribution and are present also in North America. The western and central parts of the Mediterranean and northern Europe harbor the modern lineages.

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Molecular phylogenetic relationships inAveneae (Poaceae) species and other grasses as inferred from ITS1 and ITS2 rDNA sequences

Cited by 67 publications

References 35 publications

Molecular Diversity and Physical Mapping of 5S rDNA in Wild and Cultivated Oat Grasses (Poaceae: Aveneae)

Molecular Diversity and Physical Mapping of 5S rDNA in Wild and Cultivated Oat Grasses (Poaceae: Aveneae)

Taxonomic Significance of Glume Morphology and Leaf Epidermal Characteristics in some Taxa of Tribe Aveneae (Poaceae)

Polyploidy and Hybridization as Main Factors of Speciation: Complex Reticulate Evolution within the Grass Genus <b><i>Helictochloa</i></b>

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