Konstantin Romaschenko

• PhD
• Senior Researcher at M.G. Kholodny Institute of Botany

To investigate the evolutionary relationships and biogeographical history among the species of Agrostis and allied genera within the subtribe Agrostidinae, we generated a phylogeny based on sequences from nuclear ribosomal DNA (ITS) and three plastid regions ( rpl32‐trnL spacer, rps16‐trnK spacer, and rps16 intron). We also aimed to assess the gene...

Appendix S1. List of specimens sampled. Taxa corresponding to Sampling 1 are indicated by (1) after the name used in Fig. 1, and Sampling 2 by (2) after the name used in Fig. 4. Taxon name, country, and next division, voucher (collector, number, and where the specimen is housed), and GenBank accession number for DNA sequences ITS, rps16-trnK, rps16...

Koelerioid grasses (subtribe Aveninae, tribe Poeae; Pooideae) resolve into two major clades, here called Koelerioid Clades A and B. Phylogenetic relationships among koelerioid grasses are investigated using plastid DNA sequences of rpl32-trnL, rps16-trnK, rps16 intron, and ITS regions, focusing on Trisetum, Acrospelion, and some annual species (Ros...

Generic delimitation within the tribe Stipeae has been a dynamic process since the late 1980s. In this study, we focus on a morphologically cohesive group of Jarava species with plumose-like awns that previous phylogenetic studies suggested were sister to the genus Pappostipa and only distantly related to Jarava sensu stricto. To test this hypothes...

A taxonomic treatment of 38 species of Muhlenbergia , a phylogeny based on analysis of six DNA sequence markers, and classification of Muhlenbergia for Central America (Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama; and Campeche, Chiapas, Quintana Roo, Tabasco, and Yucatán, México) is given. With the support from a molecul...

To investigate the evolutionary relationships among species of the tribe Triraphideae (including two monotypic genera, Habrochloa and Nematopoa ), we generated a phylogeny based on DNA sequences from nuclear ribosomal (ITS) and four plastid markers ( rps16-trnK , rps16 intron, rpl32-trnL , and ndhA intron). Habrochloa and Nematopoa form a clade tha...

We present an updated worldwide phylogenetic classification of Poaceae with 11,783 species in 12 subfamilies, seven supertribes, 54 tribes, five supersubtribes, 109 subtribes, and 789 accepted genera. The subfamilies (in descending order based on the number of species) are Pooideae with 4126 species in 219 genera, 15 tribes, and 34 subtribes; Panic...

To investigate the evolutionary relationships and biogeographical history among the species of Calamagrostis and other members of subtribe Agrostidinae, Calothecinae, Echinopogoninae, and Paramochloinae, we generated a phylogeny based on DNA sequences from one nuclear ribosomal and three plastid areas (ITS, rpl32‐trnL spacer, rps16‐trnK spacer, and...

To investigate the evolutionary relationships among species of Afrotrichloris, Apochiton, Coelachyrum, Dinebra, Eleusine, Leptochloa, and Schoenefeldia of subtribe Eleusininae a phylogeny based on DNA sequences from nine gene regions (ITS, rps16-trnK, rps3, rps16, rpoC2, rpl32-trnL, ndhF, ndhA, ccsA) is presented. Previous molecular phylogenies ind...

A phylogeny based on analysis of six DNA sequence markers (ITS, ndhA intron, rpl32-trnL, rps3, rps16 intron, and rps16-trnK) is used to infer ancestral areas, divergence times, and reconstruct the biogeographical history and evolution of 150 of the 183 (82%) species of Muhlenbergia. Our results suggest the genus originated 9.3 mya in the Sierra Mad...

Chenopodium rugosum was described by Aellen in 1928, based on a specimen collected in Siberia by Arnell and deposited in the US Herbarium. For a long time, this Aellen's name was forgotten or ignored by the researchers, mainly because of the uncertain identity of that taxon and unavailability of its type. We report here the holotype of C. rugosum r...

Based on a molecular DNA phylogeny of three plastid (rpl32-trnK, rps16 intron, and rps16-trnK) and nuclear ITS regions investigating 32 species of Agrostidinae, we describe two new genera, Agrostula gen. nov. with a single species and Alpagrostis gen. nov. with four species; provide support for five species in a monophyletic Podagrostis; and includ...

The phylogeny of subtribe Hubbardochloinae is revisited, here with the inclusion of the monotypic genus Tetrachaete, based on a molecular DNA analysis using ndhA intron, rpl32-trnL, rps16 intron, rps16-trnK, and ITS markers. Tetrachaete elionuroides is aligned within the Hubbardochloinae and is sister to Dignathia. The biogeography of the Hubbardoc...

We present a phylogeny based on four DNA molecular markers (rps16–trnK spacer, rps16 intron, rpl32–trnL spacer and ITS) concentrating on species of Eragrostis Wolf in Australia. Two Australian radiations are shown within Eragrostis, one being centred in the arid zone and one in the monsoon tropics. The genus is paraphyletic, with species of Cladora...

Based on morphological study and corroborated by unpublished molecular phylogenetic analyses, five grass species of high-mountain grasslands in Mexico, Central and South America, Agrostis bacillata , A. exserta , A. liebmannii , A. rosei , and A. trichodes , are transferred to Podagrostis and bring the number of species of this genus recognized in...

Eriocoma valdesiisp. nov. , is described and illustrated. The new species was found growing on calcareous rocky slopes and hillsides between 1700–2721 m in Coahuila, Nuevo León, San Luis Potosí, and Tamaulipas. The new species is morphologically similar to Eriocoma lobata but differs in having ligules (2–) 4.5–8.5 mm long with acute to narrowly acu...

Based on morphological and molecular evidence we transfer the species of Trisetum sect. Trisetaera, T. hispidum, and Trisetokoeleria taymirica into Koeleria, describe Koeleria sect. Hispanica, and provide a new generic emendation. A total of 49 new combinations or new names are included. Additionally, we lectotypify Avena clarkei Hook f., Avena mic...

Based on morphological and molecular evidence we present new combinations or new names for 77 taxa of Cinnagrostis, seven taxa of Deschampsia, and 24 taxa of Peyritschia; and describe three new genera, Greeneochloa P.M. Peterson, Soreng, Romasch. & Barberá, gen. nov. (subtribe Echinopogoninae), Paramochloa P.M. Peterson, Soreng, Romasch. & Barberá,...

Based on morphological and molecular evidence we present new combinations or new names for 77 taxa of Cinnagrostis, seven taxa of Deschampsia, and 24 taxa of Peyritschia; and describe three new genera, Greeneochloa P.M. Peterson, Soreng, Romasch. & Barberá, gen. nov. (subtribe Echinopogoninae), Paramochloa P.M. Peterson, Soreng, Romasch. & Barberá,...

Based on earlier molecular DNA studies we recognize 14 native Stipeae genera and one intergeneric hybrid in North America. We provide descriptions, new combinations, and 10 illustrations for species of Barkworthiagen. nov., Eriocoma, Neotrinia, Oloptum, Pseudoeriocomagen. nov., Ptilagrostiellagen. nov., Thorneochloagen. nov., and ×Eriosellanothogen...

To investigate the evolutionary relationships among the species of Trisetum and other members of subtribe Koeleriinae a phylogeny based on DNA sequences from four gene regions (ITS, rpl32‐trnL spacer, rps16‐trnK spacer, and rps16 intron) is presented. The analyses, including type species of all genera in Koeleriinae (Acrospelion, Avellinia, Cinnagr...

A taxonomic treatment, phylogeny based on analysis of six DNA sequence markers (ITS, ndhA intron, rpl32-trnL , rps3 , rps16 intron and rps16-trnK ) and classification of Muhlenbergia for Peru is given. Seventeen species and one presumed hybrid are recognised. Muhlenbergiaromaschenkoisp. nov. is newly described from the Río Huallaga Valley, northeas...

Phylogeny of Muhlenbergia subg. Pseudosporobolus, including M. spatha... 83 Phylogeny of Muhlenbergia subg. Pseudosporobolus, including M. spatha (Poaceae, Chloridoideae, Cynodonteae, Muhlenbergiinae) now found in Zacatecas, Mexico Citation: Peterson PM, Arrieta YH, Romaschenko K (2018) Phylogeny of Muhlenbergia subg. Pseudosporobolus, including M....

Based on morphological and molecular evidence, Trisetum floribundum [syn. Dielsiochloa floribunda (Pilg.) Pilg.] is transferred to Festuca as Festuca floribunda (Pilg.) P.M. Peterson, Soreng & Romasch., comb. nov. Specimens examined (Argentina, Bolivia, Chile, Peru) are included.

Diplachne P. Beauv. comprises two species with C4 (NAD-ME) photosynthesis. Diplachnefusca has a nearly pantropical-pantemperate distribution with four subspecies: D.fuscasubsp.fusca is Paleotropical with native distributions in Africa, southern Asia and Australia; the widespread Australian endemic D.f.subsp.muelleri; and D.f.subsp.fascicularis and...

The phylogenetic system for arranging grass genera in US National Herbarium (2017).

Allolepis, Jouvea, Kalina, and Sohnsia are small (only Jouvea contains two species), often overlooked genera that are morphologically and genetically isolated within the tribe Cynodonteae. We present a molecular phylogeny using sequence data from seven plastid markers (ccsA, ndhA intron, ndhF, rpl32-trnL, rpoC2, rps16-trnK, and rps16 intron) and th...

We present a new worldwide phylogenetic classification of 11 506 grass species in 768 genera, 12subfamilies, seven supertribes, 52 tribes, five supersubtribes, and 90 subtribes; and compare two phylogeneticclassifications of the grass family published in 2015 (Soreng et al. and Kellogg). The subfamilies (in descending orderbased on the number of speci...

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...

Morphologically, the tribe Cynodonteae is a diverse group of grasses containing about 839 species in 96 genera and 18 subtribes, found primarily in Africa, Asia, Australia, and the Americas. Because the classification of these genera and species has been poorly understood, we conducted a phylogenetic analysis on 213 species (389 samples) in the Cyn...

Morphologically, the tribe Cynodonteae is a diverse group containing about 839 species in 93 genera and 18 subtribes, found primarily in Africa, Asia, Australia, and the Americas. A modern classification of the Cynodonteae based on the study of molecular characters has resulted in major changes in the circumscription and alignment of genera but the...

The subtribe Eleusininae (Poaceae: Chloridoideae: Cynodonteae) is a diverse group containing about 212 species in 31 genera found primarily in low latitudes in Africa, Asia, Australia, and the Americas, and the classification among these genera and species is poorly understood. Therefore, we investigated the following 28 Eleusininae genera: Acrachn...

Bouteloua (Poaceae: Chloridoideae: Cynodonteae; Boutelouiane) is an important genus of forage grasses containing 60 species found primarily in the Americas with a center of diversity in northern Mexico. A modern subgeneric classification is lacking. The goals of our study were to reconstruct the evolutionary history among the species of Bouteloua u...

The following four new combinations are made: Sporobolus borszczowii (Regel) P.M. Peterson, Sporobolus borszczowii subsp. acuminatus (Trin.) P.M. Peterson, Sporobolus borszczowii subsp. ambiguus (Boiss. & Balansa ex Boiss.) P.M. Peterson, and Sporobolus montevidensis (Arechav.) P.M. Peterson & Saarela

Based on recent molecular and morphological studies we present a modern worldwide phylogenetic classification of the ±12,074 grasses and place the 771 grass genera into 12 subfamilies (Anomochlooideae, Aristidoideae, Arundinoideae, Bambusoideae, Chloridoideae, Danthonioideae, Micraioideae, Oryzoideae, Panicoideae, Pharoideae, Puelioideae, and Pooid...

Poster developed from: Soreng, R. J., P. M. Peterson, K. Romaschenko, G. Davidse, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras, J. I. Davis & O. Morrone. 2015. A worldwide phylogenetic classification of the Poaceae (Gramineae). J. Syst. Evol. 53(2): 117–137

The grass subtribe Sporobolinae contains six genera: Calamovilfa (5 spp. endemic to North America), Crypsis (10 spp. endemic to Asia and Africa), Psilolemma (1 sp. endemic to Africa), Spartina (17 spp. centered in North America), Sporobolus (186 spp. distributed worldwide), and Thellungia (1 sp. endemic to Australia). Most species in this subtribe...

A molecular phylogeny and classification of Eriocoma and Ptilostipa (Poaceae: Stipeae)

There is no easy way to identify to species, a small, vegetative leaf or culm sample of a grass and there are more than 12,000 species in this large, important family. The long-range aim of our study is to produce a standard DNA barcode library available to the public for all grasses (±1960 species) in North America (includes all Canada, Mexico and...

Abstract— The genus Nassella, as currently circumscribed, includes 116‐117 American species. It is characterized by florets with a strongly convolute lemma, a conspicuous or inconspicuous crown, and a short palea. Using 53 species of Nassella and 22 outgroup species we conducted phylogenetic analyses to test the monophyly of Nassella and relationsh...

The classification of twenty Cynodonteae genera (Bewsia, Craspedorhachis, Ctenium, Dignathia, Farrago, Gouinia, Gymnopogon, Latipes, Leptocarydion, Leptothrium, Lophacme, Lopholepis, Mosdenia, Perotis, Schenckochloa, Toliara, Trichoneura, Trigonochloa, Triplasis, Vaseyochloa) has been poorly understood. The goals of this study were to reconstruct t...

Proposal to conserve Sporobolus against Spartina (Poaceae, Chloridoideae, Sporobolinae)

A world-wide phylogenetic classification of Poaceae (Gramineae)

A Molecular Phylogeny and Classification of the Sporobolinae (Poaceae: Chloridoideae)

A molecular phylogeny of the Eleusininae (Poaceae: Chloridoideae: Cynodonteae)

Based on recent molecular and morphological studies we present a modern worldwide phylogenetic classification of the AE 12074 grasses and place the 771 grass genera into 12 subfamilies (Anomochlooideae, Zoysiinae). In addition, we include a radial tree illustrating the hierarchical relationships among the subtribes, tribes, and subfamilies. We use...

Genetic interchange between American and Eurasian species is fundamental to our understanding of the biogeographical patterns, and we make a first attempt to reconstruct the evolutionary events in East Asia that lead to the origin and dispersal of two genera, Patis and Ptilagrostis. We conducted a molecular phylogenetic study of 78 species in the t...

Disakisperma Steud. is a genus of four predominantly perennial C4 (NAD-ME) species in the Americas, Africa, and Asia. Its species previously were treated in Eleusine, Eragrostis, Coelachyrum, Cypholepis, Leptochloa, or Diplachne by nearly all authors.It includes the widespread North and South American amphitropical disjunct Disakisperma dubium (typ...

Miocene–Pliocene Speciation, Introgression, and Migration of Patis and Ptilagrostis (Poaceae: Stipeae)

A Molecular Phylogeny and Classification of Eriocoma and Pseudoeriocoma (Poaceae: Stipeae)

A Molecular Phylogeny and Classification of the Sporobolinae (Poaceae: Chloridoideae).

A Molecular Phylogeny and Classification of Nineteen Genera in the Chlorideae (Poaceae: Chloridoideae)

Filogenia molecular y clasificación de 20 géneros de la tribu Chlorideae (Poaecae: Cloridoideae)

Leptochloa (including Diplachne) sensu lato (s.l.) comprises a diverse assemblage of C(4) (NAD-ME and PCK) grasses with approx. 32 annual or perennial species. Evolutionary relationships and a modern classification of Leptochloa spp. based on the study of molecular characters have only been superficially investigated in four species. The goals of t...

We conducted a molecular phylogenetic study of the tribe Stipeae using nine plastid DNA sequences (trnK-matK, matK, trnH-psbA, trnL-F, rps3, ndhF, rpl32-trnL, rps16-trnK, rps16 intron), the nuclear ITS DNA regions, and micromorphological characters from the lemma surface. Our large original dataset includes 156 accessions representing 139 species o...

Historically, there has been taxonomic confusion among agrostologists regarding the short-spikeleted Stipeae. We refer to these as the Oryzopsis/Piptatherum complex which consists of short-spikeleted species with coriaceous to cartilaginous and often caducous-awned lemmas, and florets with a blunt callus. We conducted a phylogenetic analysis of 53...

There has been confusion among taxonomists regarding the subfamilial placement of Merxmuellera papposa, M. rangei, and four species of Centropodia even though many researchers have included them in molecular studies. We conducted a phylogenetic analysis of 127 species using seven plastid regions (rps3, rps16-trnK, rps16, rpl32-trnL, ndhF, ndhA, mat...