Allopolyploid speciation in Siberian Dactylorhiza (Orchidaceae, Orchidoideae)

Efimov, Petr G.; Philippov, Evgenij G.; Krivenko, Denis A.

doi:10.11646/phytotaxa.258.2.1

Cited by 16 publications

(19 citation statements)

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“…Previous studies in diploid birch species have shown that HWE can generally be assumed (Rusanen, Vakkari, & Blom, 2003;Tsuda & Ide, 2005;Tsuda et al, 2015Tsuda et al, , 2009. Polyploids, especially allopolyploids, always display higher values of FIS, confirming nonrecombinant inheritance of parental genomes (Efimov, Philippov, & Krivenko, 2016;Lobato-de Magalhães et al, 2019).…”

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confidence: 73%

Population genetic structures of two ecologically distinct species Betula platyphylla and B. ermanii inferred based on nuclear and chloroplast DNA markers

Wang

Yin

et al. 2019

Ecology and Evolution

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Climatic oscillations during the last glacial maximum (LGM) significantly affected the distribution patterns and genetic structure of extant plants. Northeast China (NEC) is a major biodiversity center in East Asia, and the influence of historical climate change on NEC populations is critical for understanding species responses to future climate change. However, only a few phylogeographic studies of cool temperate deciduous tree species have been conducted in the area, and results are inconsistent for species with different niches or distribution areas. We employed multiple chloroplast and nuclear markers to investigate the genetic structure of two ecologically contrasting species, Betula platyphylla and B. ermanii, in NEC. Rare haplotypes were identified in the chloroplast genome of these species, and both exhibited high levels of nucleotide diversity based on a fragment of the nuclear gene G3PDH and microsatellites. Moreover, significant phylogeographic structure was detected for B. platyphylla, suggesting that these populations had recolonized from independent glacial refuges, whereas no genetic structure was found for B. ermanii. OPEN RESEARCH BADGES The nSSR datasets used in the current study and the table of pairwise FST (below diagonal) and its standardized F'ST (above diagonal) among 25 populations based on seven SSRs are available from the Dryad (DOI: https://doi.org/10.5061/dryad.230d176). Sequences generated from this study were deposited in GenBank under Accession nos. – and –.

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confidence: 73%

Population genetic structures of two ecologically distinct species Betula platyphylla and B. ermanii inferred based on nuclear and chloroplast DNA markers

Wang

Yin

et al. 2019

Ecology and Evolution

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“…However, we assume that the rank of variety is not appropriate for distinct allopolyploid taxa with different chromosome numbers. Allopolyploids with different evolutionary origins are usually classified at the species level, even if they share one or more parental species (e.g., Soltis & al., 2004; Kelly & al., 2013; Zou & al., 2015; Barker & al., 2016); in some cases, even the products of independent hybridization with an identical parental combination are being evaluated as separate species (mostly in apomictic genera, but also in allogamous species, e.g., Efimov & al., 2016). We also point out that C. hamulata and C. brutia subsp.…”

Section: Discussionmentioning

confidence: 99%

Intricate evolutionary history of Callitriche (Plantaginaceae) taxa elucidated by a combination of DNA sequencing and genome size

Prančl

Fehrer

Caklová

et al. 2020

TAXON

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The widespread aquatic plant genus Callitriche is taxonomically very challenging, but noteworthy in many evolutionary aspects including a high overall diversity, extensive phenotypic plasticity, remarkable reproductive systems and a large variation in ploidy levels and chromosome numbers. We conducted a multi‐level systematic study on 346 individuals of 25 taxa from 21 mostly European countries. Flow cytometric estimation of genome size, chromosome counting and direct sequencing of ITS and trnT‐trnL DNA markers combined with RFLPs of the ITS region were applied in order to unravel the phylogenetic relationships among Callitriche taxa and to clarify the origin of polyploid species and hybrids. Additionally, ITS sequences from a recent worldwide phylogenetic study of the genus were included for comparison. We demonstrate that most of the traditionally recognized European Callitriche taxa are well defined by a combination of genome size and molecular markers. Several species showed remarkable intraspecific genetic variation; previously unknown cryptic taxa were revealed within C. stagnalis, C. truncata and North American C. heterophylla. The origin of selected polyploid taxa was investigated in detail. Diploid C. cophocarpa was confirmed to be the parental species of tetraploid C. platycarpa, but we did not find direct evidence for the putative allopolyploid origin of this species. The complex of C. brutia included three taxa; of these, C. hamulata is probably an allooctoploid derivative of C. brutia var. brutia and C. cophocarpa/C. platycarpa. The third member, C. brutia var. naftolskyi, was newly reclassified at the subspecies level; for the first time, chromosome numbers are provided for this poorly known taxon. For a single triploid sample, our results suggested an autopolyploid origin from C. stagnalis. Four Callitriche hybrids were revealed, two of which are newly described and validated here as C. ×nyrensis and C. brutia nothosubsp. neglecta. A tentative intrageneric concept of two sections (Callitriche, Pseudocallitriche) is adopted, with the need for a more detailed evaluation in the future.

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“…1). All plant names are given in accordance with the Flora Sibiriae (1987) as well as more recent taxonomic treatments of particular genera (Efimov et al 2016). Cypripedium macranthos Sw. is named according to Averyanov (2000).…”

Section: Methodsmentioning

confidence: 99%

“…2). According to Efimov et al (2016) we consider Dactylorhiza cruenta to D. incarnata and exclude D. maculata from the list of orchid species.…”

Section: Diversity Of Orchidaceae Species In the Study Areamentioning

confidence: 99%

An orchid (Orchidaceae)-rich area recommended for preservation in Novosibirsk Region, Russia

Dubynin¹,

Selyutina²,

Егорова³

et al. 2021

ABS

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The spatial distribution of 14 species of the orchid family (Orchidaceae) was studied at the left bank of the Koynikha River (Iskitimskiy District, Novosibirsk Region, Russia). Four species are listed in the Russian Federation Red Data Book, four are listed in the Novosibirsk Region Red Data Book. The number of individual plants is sufficient to ensure the long-term viability of each red-listed orchid population. What is apparently one of the largest populations of Cypripedium macranthos in the region is described (up to 5,000 individuals). Some of the orchids discovered require further study, namely interspecific hybrids of Dactylorhiza and Gymnadenia and distinctive floral developmental morphs of Platanthera. Аpplying the international criteria for allocation of an “Important Plant Area”, we nominate a new one for South Siberia. Based on the analysis of plant species composition of protected areas in Novosibirsk Region, we conclude that in situ preservation of orchids in the region is overall insufficient. It is therefore necessary to organize a new protected area “Orchid Zapovednik” in the category of “botanical Zakaznik” on 335 hectares with an explicit floral diversity conservation mandate and long-term orchid population monitoring.

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Allopolyploid speciation in Siberian Dactylorhiza (Orchidaceae, Orchidoideae)

Cited by 16 publications

References 1 publication

Population genetic structures of two ecologically distinct species Betula platyphylla and B. ermanii inferred based on nuclear and chloroplast DNA markers

Population genetic structures of two ecologically distinct species Betula platyphylla and B. ermanii inferred based on nuclear and chloroplast DNA markers

Intricate evolutionary history of Callitriche (Plantaginaceae) taxa elucidated by a combination of DNA sequencing and genome size

An orchid (Orchidaceae)-rich area recommended for preservation in Novosibirsk Region, Russia

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