Diploid and tetraploid cytotypes and subspecies of Odontarrhena tortuosa (Brassicaceae) in Pannonia: differences in morphology, ecology and genome size

Phytotaxa ◽  
2018 ◽  
Vol 358 (2) ◽  
pp. 162
Author(s):  
STANISLAV ŠPANIEL ◽  
LÝDIA HABURAJOVÁ ◽  
VERONIKA CETLOVÁ
Keyword(s):  
Genome Size ◽  
Central Europe ◽  
Morphological Variation ◽  
Pannonian Basin ◽  
Sand Dunes ◽  
Distribution Area ◽  
Flow Cytometric Data ◽  
Flow Cytometric ◽  
Morphological Differences ◽  
Rocky Habitats

Odontarrhena tortuosa is a herbaceous species occurring in steppe and rocky habitats of Eurasia. The present study is focused on the cytogeography and morphological variation of the species’ populations growing in the Pannonian basin (Central Europe), which represents the westernmost part of its distribution area. Flow cytometric analyses have revealed the existence of tetraploid populations, which are reported here for the first time for Central Europe. We analysed the morphological variation of 329 individuals from Slovakia, Hungary and Serbia by multivariate morphometric methods to evaluate morphological differences between two cytotypes (diploids and tetraploids), between the subspecies (O. tortuosa subsp. tortuosa and O. tortuosa subsp. heterophylla) and between populations growing in three regions differing in the type of substrate (rocks, sand dunes and sandy and rocky screes). Although we have not found any clear morphological differences between the cytotypes, we have confirmed several previously reported morphological differences between the two subspecies, which occur in regions differing in the type of substrate. Flow cytometric data also indicate certain differences in monoploid genome size between all groups of populations under comparison. Populations from Serbia differ from other populations of O. tortuosa subsp. tortuosa in morphology and genome size, but due to a lack of data on the genetic variation of the species we suggest no change in taxonomy. For the identification of the two subspecies, we present an updated determination key.

Overlooked morphological variation and a proposal for a new taxonomic circumscription of Alyssum simplex (Brassicaceae)

Phytotaxa ◽  
2019 ◽  
Vol 416 (2) ◽  
pp. 149-166
Author(s):  
VERONIKA CETLOVÁ ◽  
JAVIER FUERTES-AGUILAR ◽  
DARIA IUDOVA ◽  
STANISLAV ŠPANIEL
Keyword(s):  
Genome Size ◽  
Genetic Markers ◽  
Geographic Distribution ◽  
Morphological Variation ◽  
Related Species ◽  
Evolutionary History ◽  
Separate Species ◽  
Taxonomic Treatment ◽  
Morphological Differences

A recent study of European annual taxa of Alyssum has revealed that A. simplex includes two cytotypes (diploid and tetraploid) which differ in genetic markers, evolutionary history, and monoploid relative genome size. In this paper we present a new taxonomic treatment of A. simplex in which we treat the two cytotypes as two separate species. We select and discuss suitable names for both taxa (diploid A. simplex and tetraploid A. collinum), examine their morphological differences and survey their geographic distribution. In addition, we compare both cytotypes with the morphologically similar and genetically related species A. strigosum and designate lectotypes and a neotype of several relevant names.

Nuclear genome size in Selaginella

Genome ◽  
2007 ◽  
Vol 50 (4) ◽  
pp. 351-356 ◽  
Author(s):  
Damon P. Little ◽  
Robbin C. Moran ◽  
Eric D. Brenner ◽  
Dennis Wm. Stevenson
Keyword(s):  
Chromosome Number ◽  
Genome Size ◽  
Nuclear Genome ◽  
Rank Correlation ◽  
Cultivated Plants ◽  
Strongly Correlated ◽  
Flow Cytometric Data ◽  
Spearman’S Rank Correlation ◽  
Time Estimates ◽  
Flow Cytometric

Estimates of nuclear genome size for 9 Selaginella species were obtained using flow cytometry, and measurements for 7 of these species are reported for the first time. Estimates range from 0.086 to 0.112 pg per holoploid genome (84–110 Mb). The data presented here agree with the previously published flow cytometric results for S. moellendorffii . Within the 9 species sampled here, chromosome number varies from 2n = 16 to 2n = 27. Nuclear genome size appears to be strongly correlated with chromosome number (Spearman’s rank correlation; p = 0.00003725). Cultivated S. moellendorffii lacks sexual reproduction—manifest by the production of abortive megasporangia. Flow cytometric data generated from a herbarium specimen of a fertile wild-collected S. moellendorffii are virtually indistinguishable from the data generated from fresh material (0.088 vs. 0.089 pg/1C). Therefore, the limited fertility observed in cultivated plants is probably not the result of abnormal chromosome number (e.g., induced by interspecific hybridization).

scholarly journals Continuous Morphological Variation Correlated with Genome Size Indicates Frequent Introgressive Hybridization among Diphasiastrum Species (Lycopodiaceae) in Central Europe

PLoS ONE ◽  
2014 ◽  
Vol 9 (6) ◽  
pp. e99552 ◽  
Author(s):  
Kristýna Hanušová ◽  
Libor Ekrt ◽  
Petr Vít ◽  
Filip Kolář ◽  
Tomáš Urfus
Keyword(s):  
Genome Size ◽  
Central Europe ◽  
Morphological Variation ◽  
Introgressive Hybridization

Patterns of morphological variation within Acacia suaveolens (Mimosaceae)

1995 ◽  
Vol 8 (6) ◽  
pp. 1013 ◽  
Author(s):  
DA Morrison ◽  
AJ Rupp
Keyword(s):  
Morphological Variation ◽  
Environmental Conditions ◽  
Environmental Variables ◽  
Sand Dunes ◽  
Morphological Variability ◽  
Herbarium Specimens ◽  
Morphometric Analyses ◽  
Eastern Australia ◽  
Morphological Differences ◽  
Myall Lakes

Acacia suaveolens shows a considerable degree of morphological variability throughout its range in eastern Australia. Multivariate morphometric analyses of data from 375 herbarium specimens suggest that there are five polythetically distinct forms within this species. The morphological boundaries between these forms are somewhat arbitrary but are closely related to a number of environmental variables. Discrimination between these forms is possible only on the basis of a combination of attributes. In all cases, the distinctions between the forms are maintained in offspring plants grown under controlled environmental conditions, indicating that these morphological differences are genetically fixed. These forms are taxonomically treated as new subspecies. Apart from the typical form (subsp. suaveolens), which is widespread, the following morphological forms have been identified: a form with narrower phyllodes, restricted to the Holocene sand dunes in the Myall Lakes region (subsp. myallensis D. Morrison & A.J. Rupp); a form with wider phyllodes and longer pulvinus, and longer and thicker seeds, occurring in areas with an altitude above 300 m (subsp. montana D. Morrison & A.J. Rupp); a form with wider phyllodes, more flower heads per raceme, thicker seeds, and a small rootstock, restricted to the Grampians region (subsp. grampianensis D. Morrison & A.J. Rupp); and a form with shorter phyllodes, shorter internodes, shorter fruits, thicker seeds and a prostrate habit, occurring on windswept coastal headlands (subsp. prostrata D. Morrison & A.J. Rupp).

scholarly journals Low variability of Orchis militaris L. in a local population in the Altay Territory, Russia: evidence from morphometrical and caryological analyses

2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Yulianna G. Zaytseva ◽  
◽  
Alexandra Yu. Nabieva ◽  
Elena V. Zhmud ◽  
◽  
...  
Keyword(s):  
Genome Size ◽  
Rare Species ◽  
Local Population ◽  
Chromosome Counts ◽  
Natural Conditions ◽  
Flow Cytometric Data ◽  
Flow Cytometric ◽  
Its Regions ◽  
Long Time ◽  
First Time

Orchis militaris L. is a rare species at the territory of Russia and in many of its regions. This species has been studied for a long time, but the genome size of its representatives in natural conditions has not been studied yet. This assessment is of great importance for the development of measures for the rare species preservation in natural conditions and in the tissue culture. Chromosome counts were completed by flow cytometric data and morphological observations in order to study the species intrapopulation variability. Here, the flow cytometric data on genome size and DNA content of O. militaris from the Asian part of Russia are presented for the first time.

IVBT-documented platelet function correlates with flow cytometric data

1996 ◽  
Vol 17 (4) ◽  
pp. 553-558 ◽  
Author(s):  
J HOFFMANN
Keyword(s):  
Platelet Function ◽  
Flow Cytometric Data ◽  
Flow Cytometric

Geodynamical models of lithospheric deformation, rotation and extension of the Pannonian Basin of Central Europe

2010 ◽  
Vol 492 (1-4) ◽  
pp. 73-87 ◽  
Author(s):  
Piroska Lorinczi ◽  
Gregory Houseman
Keyword(s):  
Central Europe ◽  
Pannonian Basin ◽  
Lithospheric Deformation

scholarly journals Models for the electronic processing of flow cytometric data at high particle rates

Cytometry ◽  
1992 ◽  
Vol 13 (2) ◽  
pp. 149-154 ◽  
Author(s):  
A. van Rotterdam ◽  
J. Keij ◽  
J. W. M. Visser
Keyword(s):  
Flow Cytometric Data ◽  
High Particle ◽  
Flow Cytometric ◽  
Electronic Processing

A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico

Phytotaxa ◽  
2021 ◽  
Vol 528 (2) ◽  
pp. 93-110
Author(s):  
JOSÉ SAID GUTIÉRREZ-ORTEGA ◽  
MIGUEL ANGEL PÉREZ-FARRERA ◽  
JEFFREY CHEMNICK ◽  
TIMOTHY J. GREGORY
Keyword(s):  
New Species ◽  
Morphological Variation ◽  
Related Species ◽  
Statistical Tests ◽  
Distinct Species ◽  
Closely Related Species ◽  
Morphometric Variation ◽  
Isthmus Of Tehuantepec ◽  
Morphological Differences ◽  
Recent Evaluation

The cycad genus Dioon comprises 17 species from Mexico and Honduras, all of them delimited based on their morphological variation and geographic distribution. A recent evaluation of the biological variation among Dioon populations from Oaxaca and Chiapas, Mexico, demonstrated that the concept of the species Dioon merolae actually consists of three lineages that should be recognized as different taxa. One lineage was already described as Dioon oaxacensis, leaving the concept of Dioon merolae comprising two lineages distributed on both sides of the Isthmus of Tehuantepec. However, there are conspicuous morphological differences between these two lineages. Here, we tested whether such a differentiation within the concept of Dioon merolae merits the differentiation of two different taxa. We evaluated the qualitative and morphometric variation among populations belonging to the Dioon merolae lineages, and compared it with the closely related species Dioon oaxacensis. Morphological observations and statistical tests demonstrated that the populations of southeastern Oaxaca, traditionally considered as part of Dioon merolae, represent a distinct species that we described as Dioon salas-moralesae. Identifying the diagnostic characters of this new species helps enable an understanding of the criteria that should be considered to delineate the boundaries between other cycad species.

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