New forms of chromosome polymorphism in Deschampsia Antarctica Desv. from the Argentine Islands of the Maritime Antarctic region

Navrotska, D. O.; Twardovska, M. O.; Андреев, И. О.; Parnikoza, Іvan; Betekhtin, Alexander; Zahrychuk, O. M.; Дробык, Н. М.; Hasterok, Robert; Кунах, В. А.; Cytology, Poland

doi:10.33275/1727-7485.13.2014.226

Cited by 8 publications

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“…Our results reveal a variation in ploidy level in D. antarctica, including diploid (2n = 26) and tetraploid (2n = 52) populations The chromosome numbers were known by counts from populations in the sub-Antarctic Islands (Moore 1970;Cardone et al 2009;Navrotska et al 2014). In this work, it was possible to analyze new populations of the Antarctic Peninsula and South America.…”

Section: Chromosome Number Variations and Karyotype Featuresmentioning

confidence: 81%

“…Cells with 27 and 13 chromosomes were described for some Antarctic individuals from 25 de Mayo Island (King George Island), attributing this anomaly to failure during mitotic division (Cardone et al 2009). Furthermore, chromosome numbers ranging from 13 to 39 in Darboux Island (west of Cape Perez; S65°23.707 0 , W64°12.905 0 ) and Great Yalour Island (Wilhelm Archipelago; S65°14.039 0 , W64°9.761 0 ) were related to genome instability in extreme environmental conditions (Navrotska et al 2014). In contrast to unusual chromosome numbers found in some cells in other cytogenetic studies of Antarctic populations (Cardone et al 2009;Navrotska et al 2014), no irregularity was observed in this study in any of the populations analyzed.…”

Section: Chromosome Number Variations and Karyotype Featuresmentioning

confidence: 99%

“…2t (Moore 1970;Cardone et al 2009). Cells with irregular numbers of chromosomes were detected as a product of failure mitotic segregation (Cardone et al 2009) or increased genome instability (Navrotska et al 2014). Other genetic studies based on molecular markers (AFLP, RAPD, sequences of nuclear and plastid DNA) showed low genetic variability in Antarctic populations and a relative differentiation toward lower latitude populations (Holderegger et al 2003;Van de Wouw et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Distribution of rDNA and polyploidy in Deschampsia antarctica E. Desv. in Antarctic and Patagonic populations

et al. 2016

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Section: Chromosome Number Variations and Karyotype Featuresmentioning

confidence: 81%

Section: Chromosome Number Variations and Karyotype Featuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Distribution of rDNA and polyploidy in Deschampsia antarctica E. Desv. in Antarctic and Patagonic populations

et al. 2016

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“…Українських антарктичних експедицій. Детальні результати цитогенетичного аналізу цих рослин наведено в роботах [12][13][14].…”

Section: матеріали і методиunclassified

“…Зокрема, поряд з рослинами з диплоїдним числом хромосом, було виявлено поліплоїдні та міксоплоїдні рослини, а також особини, каріотип яких містить 1-3 додаткові В-хромосоми. Ми припускаємо, що поява таких хромосомних форм є реакцією геному рослин D. antarctica на стресові умови зростання і, можливо, такі геномні зміни є адаптивними [12][13][14]. Проте це питання потребує додаткових досліджень.…”

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Peculiarities of chromosomal variability in cultured tissues of Deschampsia antarctica Desv. plants with different chromosome numbers

Кунах¹,

Navrotska²,

Twardovska³

et al. 2016

Visn. ukr. tov. genet. sel.

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Aim. To clarify the details of chromosome variation in calli derived from D. antarctica plants in the initial passages of the culture in vitro. Methods. Induction of callus from root explants of plants, which were grown from seeds, and consequent subcultivation of tissue culture. Cytogenetic analysis of squashed slides stained by acetic-orcein and counting the number of chromosomes in mitotic metaphase plates. Results. There were analyzed the cultured tissues derived from D. antarctica plants with different chromosome numbers: diploid plants (2n=26), mixoploid plant with B-chromosomes (2n=26+1-3B), and mixoploid plant with near-triploid modal class (2n=36, 38). Analysis of callus tissues of all plants at 2-4 passages revealed mixoploidy, presence of polyploid and aneuploid cells. The modal class in all studied calli was composed of diploid and aneuploid cells with near-diploid chromosome number. The cytogenetic structure of cell population of cultured tissues was found to vary with characteristics of the karyotype of donor plant. The largest range of variation in the number of chromosomes (from 18 to 63 chromosomes) was found in tissue culture of diploid plant (2n=26) from the Galindez Island, and the highest frequencies of polyploid (47 %) and aneuploid cells were in the culture of mixoploid plant with near-triploid modal class from the Big Yalour Island. Conclusions. In different D. antarctica cultured tissues at the early stages of the culture, the modal class was composed of diploid cells and cells with near-diploid chromosome number irrespective of karyotype of donor plant (diploid, mixoploid poliploid).Key words: Deschampsia antarctica Desv., plant tissue culture, chromosomal variability in vitro, mixoploidy.

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Characterization of some satellite DNA families in Deschampsia antarctica (Poaceae)

2017

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New forms of chromosome polymorphism in Deschampsia Antarctica Desv. from the Argentine Islands of the Maritime Antarctic region

Cited by 8 publications

References 8 publications

Distribution of rDNA and polyploidy in Deschampsia antarctica E. Desv. in Antarctic and Patagonic populations

Distribution of rDNA and polyploidy in Deschampsia antarctica E. Desv. in Antarctic and Patagonic populations

Peculiarities of chromosomal variability in cultured tissues of Deschampsia antarctica Desv. plants with different chromosome numbers

Characterization of some satellite DNA families in Deschampsia antarctica (Poaceae)

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