Molecular evolution and variability of ITS1–ITS2 in populations of Deschampsia antarctica from two regions of the maritime Antarctic

Волков, Р. А.; Kozeretska, I. A.; Kyryachenko, S.S.; Андреев, И. О.; Maidanyuk, D. M.; Parnikoza, Іvan; Кунах, В. А.

doi:10.1016/j.polar.2010.04.011

Cited by 27 publications

(15 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The evolutionary ancestral ITS variant and a derived variant have been found in both locations, whereas the most divergent variant has only been detected on King George Island. Therefore, these results demonstrate that genetically distinct plants may co-exist within the same or adjacent populations on Antarctic islands [96]. Similar observations have recently been made for chloroplastic DNA by [100].…”

Section: Molecular Genetics Datasupporting

confidence: 89%

“…A similar history, in the case of D. antarctica and C. quitensis, could potentially explain the absence of clear-cut species separation for the significant geological time some authors propose [8], as well as the onset of species split in the post-glaciation period, which seems to have taken place in the region with C. quitensis. Interestingly, based on the data on interpopulation variability of ITC in 12 plants of D. antarctica from 6 sites in the region of the Argentine Islands and 6 sites on King George Island (the South Shetland Islands separated from the former group by 500 km), as well as data available from GenBank (http://www.expasy.org), a high degree of identity (96.3%) between the samples and GenBank data was observed with the total differences between plants from different populations being within several nucleotides [96]. Nonetheless, analogy with the abovementioned Anthyllis montana is hardly possible.…”

Section: Molecular Genetics Datamentioning

confidence: 82%

“…However, an important limitation of the method is its inability to identify the genomic sequences responsible for the detected heterogeneity. For this reason, interpretation of the results obtained by AFLP may be complicated [96]. The interpretation of the results of earlier D. antarctica genetic polymorphism studies have been ambiguous.…”

Section: Molecular Genetics Datamentioning

confidence: 99%

See 2 more Smart Citations

Vascular Plants of the Maritime Antarctic: Origin and Adaptation

Parnikoza¹,

Kozeretska²,

Кунах³

2011

AJPS

View full text Add to dashboard Cite

The question of why only two species of vascular plant have colonized Antarctica has not been fully answered. This review is based on a series of parallel analyses of distribution, ecology, and adaptation on the morphological, cellular, and molecular genetic levels, and addresses the causes of the exclusive adaptation of Deschampsia antarctica Desv. (Poaceae) and Colobanthus quitensis (Kunth) Bartl. The authors conclude that the unique distribution of these species, including the Antarctic Peninsula, is not related to the presence of any specific mechanisms of adaptation to the ex-treme environment, but rather is a result of a gradual adaptation of these taxa to the extreme conditions during the de-velopment of glacial events and wide distribution and a substantial seed bank which could ensure mosaic survival in some ice-free areas, as well as survival through several years of snow and ice cover. Glaciological, molecular, popula-tion and reproduction biology studies are still necessary to deepen our understanding of the timing of the colonization of the region by vascular plants. However, keeping in mind that molecular methods alone are unlikely to give exhaus-tive evidence, application of other adequate methods in the context of the history of Pleistocenic glaciation in the region is also necessary to answer the question

show abstract

Section: Molecular Genetics Datasupporting

confidence: 89%

Section: Molecular Genetics Datamentioning

confidence: 82%

Section: Molecular Genetics Datamentioning

confidence: 99%

See 1 more Smart Citation

Vascular Plants of the Maritime Antarctic: Origin and Adaptation

Parnikoza¹,

Kozeretska²,

Кунах³

2011

AJPS

View full text Add to dashboard Cite

show abstract

“…Our knowledge concerning the genetic diver− sity of these plants is based mainly on a small number of publications devoted to D. antarctica (e.g. Chwedorzewska et al 2004;Bednarek 2008, 2011;van de Wouw et al 2008;Volkov et al 2010). Colobanthus quitensis is also poorly studied, as our understanding of its genetic composition and characteristics is based on outmoded methods like isoenzymatic analyses (Lee and Postle 1975), or very limited sample size (Gianoli et al 2004;Acuña−Rodríguez et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Genetic variability of Colobanthus quitensis from King George Island (Antarctica)

Androsiuk¹,

Chwedorzewska²,

Szandar³

et al. 2015

Polish Polar Research

View full text Add to dashboard Cite

Antarctic pearlwort (Colobanthus quitensis) is one of the flowering plant species considered native to maritime Antarctica. Although the species was intensively analyzed towards its morphological, anatomical and physiological adaptation to local environment, its genetic variability is still poorly studied. In the presented study, a recently developed retrotransposon−based DNA marker system (inter Primer Binding Site -iPBS) was applied to assess the genetic diversity and differentiation of C. quitensis populations from King George Island (South Shetland Islands, West Antarctic). A total of 143 scoreable bands were detected using 7 iPBS primers among 122 plant specimens representing 8 populations. 55 (38.5%) bands were found polymorphic, with an average of 14.3% polymorphic frag− ments per primer. Nine of all observed fragments were represented as a private bands de− ployed unevenly among populations. Low genetic diversity (on average H e = 0.040 and I = 0.061) and moderate population differentiation (F ST = 0.164) characterize the analyzed material. Clustering based on PCoA revealed, that the populations located on the edges of the study area diverge from the central populations. The pattern of population differentia− tion corresponds well with their geographic location and the characteristics of the sampling sites. Due to the character of iPBS markers, the observed genetic variability of populations may be explained by the genome rearrangements caused by mobilization of mobile genetic elements in the response to various stress factors. Additionally, this study demonstrates the usefulness of iPBS markers for genetic diversity studies in wild species.

show abstract

“…Due to the broad distribution range, both species undergo various selection forces which shape both their morphological and genetic variability. However, information on the genetic variation of these species is limited and devoted almost exclusively to D. antarctica (e.g., Chwedorzewska and Bednarek 2008;van de Wouw et al 2008;Volkov et al 2010;Chwedorzewska and Bednarek 2011;González et al 2016). As regards C. quitensis, results of the genetic variation studies can be found so far in only a few papers, which suffer from limited geographic range or the low number of populations studied (Lee and Postle 1975;Gianoli et al 2004;Acuña-Rodríguez et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Range-wide pattern of genetic variation in Colobanthus quitensis

et al. 2018

View full text Add to dashboard Cite

There is only one species representing Magnoliopsida which is considered as native to the Antarctic, i.e., Antarctic pearlwort (Colobanthus quitensis). Although it was intensively studied toward the morphophysiological adaptation to extreme environmental conditions of that area, there is still a lack of sufficient data on its genetic variability. Nine C. quitensis populations from Chile and the Maritime Antarctic were sampled to estimate the pattern of genetic variation in relation to the geographic distribution of analyzed populations and postglacial history of the species. The retrotransposon-based DNA marker system used in our studies appeared to be effective in revealing genetic polymorphism between individuals and genetic differentiation among populations. Although the level of polymorphism was low (9.57%), the Analysis of Molecular Variance showed that overall population differentiation was high (F ST = 0.6241) and revealed significant differentiation between the Northern and Southern Group of populations as well as the population from Conguillio Park. The observed genetic subdivision of C. quitensis populations was confirmed by Bayesian clustering and results of Principal Coordinates Analysis. The Southern Group of populations was characterized by generally higher genetic diversity, which was expressed by the values of the effective number of alleles, expected heterozygosity and by the distribution of private alleles. Our results suggest that the species may have survived the Last Glacial Maximum in refugia located both on the South American continent and in geographically isolated islands of the Maritime Antarctic, i.e., they support the concept of the multiregional origin of C. quitensis in Antarctica.

show abstract

Molecular evolution and variability of ITS1–ITS2 in populations of Deschampsia antarctica from two regions of the maritime Antarctic

Cited by 27 publications

References 22 publications

Vascular Plants of the Maritime Antarctic: Origin and Adaptation

Vascular Plants of the Maritime Antarctic: Origin and Adaptation

Genetic variability of Colobanthus quitensis from King George Island (Antarctica)

Range-wide pattern of genetic variation in Colobanthus quitensis

Contact Info

Product

Resources

About