Phylogeny and taxonomic synopsis of Poa subgenus Pseudopoa (including Eremopoa and Lindbergella) (Poaceae, Poeae, Poinae)

Gillespie, Lynn J.; Soreng, Robert J.; Cabi, Evren; Amiri, Neda

doi:10.3897/phytokeys.111.28081

Cited by 16 publications

(38 citation statements)

References 26 publications

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“…Our results corroborate monophyly of Poa encompassing P. apiculata Refulio (type of Tovarochloa T.D. The plastid and nrDNA trees were widely congruent and showed sister relations of P. alpina and P. bulbosa, of P. annua and P. cyrenaica, of P. diaphora and P. persica, respectively, and the latter two species together with P. sintenisii (corresponding to Poa clade E in Gillespie & al., 2018) as sister to the remaining species of Poa included in our study (Figs. 4,5).…”

Section: Circumscription Of Lineages or Generasupporting

confidence: 84%

Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae

Tkach

Schneider

Döring

et al. 2020

TAXON

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To investigate the evolutionary diversification and morphological evolution of grass supertribe Poodae (subfam. Pooideae, Poaceae) we conducted a comprehensive molecular phylogenetic analysis including representatives from most of its accepted genera. We focused on generating a DNA sequence dataset of plastid matK gene-3′trnK exon and trnL-trnF regions and nuclear ribosomal (nr) ITS1-5.8S gene-ITS2 and ETS that was taxonomically overlapping as completely as possible (altogether 257 species). The idea was to infer whether phylogenetic trees or certain clades based on plastid and nrDNA data correspond with each other or discord, revealing signatures of past hybridization. The datasets were analysed separately, in combination, by excluding taxa with discordant placements in the individual gene trees and with duplication of these taxa in a way that each duplicate has only one data partition (plastid or nrDNA). We used maximum likelihood, maximum parsimony and Bayesian approaches. Instances of severe conflicts between the phylogenetic trees derived from both datasets, some of which have been noted earlier, point to hybrid origin of several lineages such as the ABCV clade encompassing several subtribes and subordinate clades,

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Section: Circumscription Of Lineages or Generasupporting

confidence: 84%

Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae

Tkach

Schneider

Döring

et al. 2020

TAXON

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“…Some subsets of the genera placed here have sometimes been accepted in traditional classifications (Tzvelev, , ; Davis, ), or implied by generic arrangements (Tutin, ; Clayton & Renvoize, ). However, these subtribes were not banded together until recent molecular studies verified their relationships (Döring et al, ; Gillespie et al, , , unpublished data; Döring, ; Schneider et al, ; Soreng et al, ). They share glabrous caryopses, usually with lipid, and a short hilum (mostly less than ¼ the length), and a hairy callus in genera with more than one floret per spikelet.…”

Section: Discussionmentioning

confidence: 99%

A worldwide phylogenetic classification of the Poaceae (Gramineae) II: An update and a comparison of two 2015 classifications

Soreng

Peterson

Romaschenko

et al. 2017

J of Sytematics Evolution

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425

540

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We present a new worldwide phylogenetic classification of 11 506 grass species in 768 genera, 12 subfamilies, seven supertribes, 52 tribes, five supersubtribes, and 90 subtribes; and compare two phylogenetic classifications of the grass family published in 2015 (Soreng et al. and Kellogg). The subfamilies (in descending order based on the number of species) are Pooideae with 3968 species in 202 genera, 15 tribes, and 30 subtribes; Panicoideae with 3241 species in 247 genera, 13 tribes, and 19 subtribes; Bambusoideae with 1670 species in 125 genera, three tribes, and 15 subtribes; Chloridoideae with 1602 species in 124 genera, five tribes, and 26 subtribes; Aristidoideae with 367 species in three genera, and one tribe; Danthonioideae with 292 species in 19 genera, and one tribe; Micrairoideae with 184 species in eight genera, and three tribes; Oryzoideae with 115 species in 19 genera, four tribes, and two subtribes; Arundinoideae with 40 species in 14 genera, two tribes, and two subtribes; Pharoideae with 12 species in three genera, and one tribe; Puelioideae with 11 species in two genera, and two tribes; and the Anomochlooideae with four species in two genera, and two tribes. We also include a radial tree illustrating the hierarchical relationships among the subtribes, tribes, and subfamilies. Newly described taxa include: supertribes Melicodae and Nardodae; supersubtribes Agrostidodinae, Boutelouodinae, Gouiniodinae, Loliodinae, and Poodinae; and subtribes Echinopogoninae and Ventenatinae.

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“…is hexaploid (2n = 42) [44,50,53,54]. After Eremopoa was described, most authors accepted the genus [17,41,47,55,56], however, a comparison of chloroplast trnT-trnL-trnF and nuclear ITS-sequences showed that Eremopoa lies among Poa species on the phylogenetic tree [21,22,[57][58][59][60][61]. To date, P. diaphora has been joined with the species of genus Lindbergia Lehm.…”

Section: Discussionmentioning

confidence: 99%

Intragenomic Polymorphism of the ITS 1 Region of 35S rRNA Gene in the Group of Grasses with Two-Chromosome Species: Different Genome Composition in Closely Related Zingeria Species

Rodionov

Gnutikov

Носов

et al. 2020

Plants

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Zingeria (Poaceae) is a small genus that includes Z. biebersteiniana, a diploid species with the lowest chromosome number known in plants (2n = 4) as well as hexaploid Z. kochii and tetraploid Z. pisidica, and/or Z. trichopoda species. The relationship between these species and the other low-chromosomes species Colpodium versicolor are unclear. To explore the intragenomic polymorphism and genome composition of these species we examined the sequences of the internal transcribed spacer 1 of the 35S rRNA gene via NGS approach. Our study revealed six groups of ribotypes in Zingeria species. Their distribution confirmed the allopolyploid nature of Z. kochii, whose probable ancestors were Colpodium versicolor and Z. pisidica. Z. pisidica has 98% of rDNA characteristic only for this species, and about 0.3% of rDNA related to that of Z. biebersteiniana. We assume that hexaploid Z. kochii is either an old allopolyploid or a homodiploid that has lost most of the rRNA genes obtained from Z. biebersteiniana. In Z. trichopoda about 81% of rDNA is related to rDNA of Z. biebersteiniana and 19% of rDNA is derived from Poa diaphora sensu lato. The composition of the ribotypes of the two plants determined by a taxonomy specialist as Z. pisidica and Z. trichopoda is very different. Two singleton species are proposed on this base with ribotypes as discriminative characters. So, in all four studied Zingeria species, even if the morphological difference among the studied species was modest, the genomic constitution was significantly different, which suggests that these are allopolyploids that obtained genomes from different ancestors.

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Phylogeny and taxonomic synopsis of Poa subgenus Pseudopoa (including Eremopoa and Lindbergella) (Poaceae, Poeae, Poinae)

Cited by 16 publications

References 26 publications

Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae

Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae

A worldwide phylogenetic classification of the Poaceae (Gramineae) II: An update and a comparison of two 2015 classifications

Intragenomic Polymorphism of the ITS 1 Region of 35S rRNA Gene in the Group of Grasses with Two-Chromosome Species: Different Genome Composition in Closely Related Zingeria Species

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