Genome size constancy in Antarctic populations of Colobanthus quitensis and Deschampsia antarctica

Pascual-Díaz, Joan Pere; Serçe, Sedat; Hradecká, Ivana; Vaněk, Martin; Özdemir, Bahar Soğutmaz; Sultana, Nusrat; Vural, Mehtap; Vitales, Daniel; Garcia, Sònia

doi:10.1007/s00300-020-02699-y

Cited by 4 publications

(4 citation statements)

References 30 publications

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“…Grasses (Poaceae) are among those groups that have experienced ancient WGDs (Jiao et al 2011) affecting the entire family, and further ancient or more recent polyploidizations in several lineages such as those in Andropogon gerardii Vitman (Keeler and Davis 1999), in the genera Hordeum L. (Eilam et al 2009), as well as in Zea L. and Triticum L. (Kellogg 2015), have played a major role in evolution. The genus Deschampsia is another group experiencing polyploidization followed by chromosomal rearrangements (Amosova et al 2017), as evidenced also by different ploidy levels, chromosome numbers (Amosova et al 2015(Amosova et al , 2017 and a high variation in genome size (1C from 5 to 5.5 pg) for diploids (Bennett et al 1982;Murray et al 2005;Pascual-Díaz et al 2020). However, we found only one value for a tetraploid plant (1C = 9 pg) reported by Bennett et al (1982).…”

Section: Introductionmentioning

confidence: 52%

“…Polyploids were reported to be more common than diploids on the British Isles (Rothera and Davy 1986), and although there was no evidence that they were better adapted to cold environments, they were putatively associated with more disturbed habitats. Given the wide distribution of Subarctic and Arctic variants of diploid D. cespitosa (this paper; Kawano 1963;Tzvelev and Probatova 2019) and the predominance of diploid D. antarctica E.Desv on the Antarctic Peninsula (González et al 2016;Pascual-Díaz et al 2020), it is unlikely that temperature alone affected the ploidy levels. Polyploids of various plant groups in arctic regions were hypothesized to be more successful than diploids in post-glacial (re-)colonization (Brochmann et al 2004).…”

Section: Regionmentioning

confidence: 90%

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Genome size variation in Deschampsia cespitosa sensu lato (Poaceae) in Eurasia

et al. 2022

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The grass Deschampsia cespitosa is a variable taxon out of which many varieties, subspecies and endemic species have been separated. In this paper, the variation in genome size (GS) and ploidy of this grass including several of its subspecies and two related species in Eurasia was investigated by flow cytometric (FCM) measurements. GS and ploidy data were also related to specific environments and reproduction mode. Ploidy levels found by FCM were confirmed by chromosome counts of diploid (2n = 28) and tetraploid (2n = 52) samples. Seminiferous (seed bearing) D. cespitosa was mainly diploid (GS between 3.754 and 5.438 pg/1C). GS variation in diploids showed a geographic pattern with a significant difference (H = 41,441, P < 0.001) between European (median = 4.377 pg) and Asian (median = 4.881 pg) accessions. Genome size (1C) in tetraploids ranged from 7.9426 to 9.0399 pg. Tetraploid seminiferous D. cespitosa was found mostly in disturbed habitats in western and southern Europe, while tetraploids in Asia were registered in wet Arctic habitats. Genome size (1C between 8.3278 and 8.8603 pg) of the pseudoviviparous plants (spikelets produce plantlets asexually) of wet habitats in central and northern Europe indicated tetraploidy. A putative triploid (GS 6.6817 pg) was detected in Iceland. Summing up, we found a high variation in GS on the geographic scale with significant regional differences in diploid D. cespitosa. Among the tetraploids, the asexually reproducing plants were bound to specific habitats, while the seminiferous plants showed a habitat preference similar to the diploids.

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Section: Introductionmentioning

confidence: 52%

Section: Regionmentioning

confidence: 90%

Genome size variation in Deschampsia cespitosa sensu lato (Poaceae) in Eurasia

et al. 2022

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“…cespitosa is a variable and widespread species with many subspecies and closely related species (including D. sukatschewii) [61], and the genome size of D. cespitosa accessions highly depends on their geographical location and habitat [37]. Nevertheless, the average genome size of diploid D. cespitosa (1C = 4.38-5.22 pg, Eurasian region) roughly corresponds to that of diploid D. antarctica (1C = 4.98-5.31 pg) [36,37,62,63]. These data are consistent with our results showing about the same content of retrotransposons in genomes of the studied Deschampsia species, which constituted an essential portion of their repeatomes (41-43%).…”

Section: Discussionmentioning

confidence: 99%

Repeatome Analyses and Satellite DNA Chromosome Patterns in Deschampsia sukatschewii, D. cespitosa, and D. antarctica (Poaceae)

Amosova

Yurkevich

Bolsheva

et al. 2022

Genes

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Subpolar and polar ecotypes of Deschampsia sukatschewii (Popl.) Roshev, D. cespitosa (L.) P. Beauv, and D. antarctica E. Desv. are well adapted to stressful environmental conditions, which make them useful model plants for genetic research and breeding. For the first time, the comparative repeatome analyses of subpolar and polar D. sukatschewii, D. cespitosa, and D. antarctica was performed using RepeatExplorer/TAREAN pipelines and FISH-based chromosomal mapping of the identified satellite DNA families (satDNAs). In the studied species, mobile genetic elements of class 1 made up the majority of their repetitive DNA; interspecific variations in the total amount of Ty3/Gypsy and Ty1/Copia retroelements, DNA transposons, ribosomal, and satellite DNA were revealed; 12–18 high confident and 7–9 low confident putative satDNAs were identified. According to BLAST, most D. sukatschewii satDNAs demonstrated sequence similarity with satDNAs of D. antarctica and D. cespitosa indicating their common origin. Chromosomal mapping of 45S rDNA, 5S rDNA, and satDNAs of D. sukatschewii allowed us to construct the species karyograms and detect new molecular chromosome markers important for Deschampsia species. Our findings confirmed that genomes of D. sukatschewii and D. cespitosa were more closely related compared to D. antarctica according to repeatome composition and patterns of satDNA chromosomal distribution.

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“…Deschampsia antarctica en zor çevre koşullarına (aşırı düşük sıcaklık, kuraklık, yüksek tuzluluk, sel, yüksek UV radyasyonu ve düşük yağış) başarıyla adapte olmuştur. Doku kültürü, genetik, morfolojik, fizyolojik, biyokimyasal ve moleküler düzeylerde olmak üzere farklı biyoteknolojik çalışmalarda yaygın olarak kullanılan bir bitkidir [18,19,20,24,26,33,34,35].…”

Section: Deschampsia Antarctica Desv (Antarctic Hairgrass; Antarktika çAyırsaçı)unclassified

Antarktika: Yaşam Bilimleri ve Biyoteknoloji Araştırmalarının Gözden Geçirilmesi

Kirkinci

Marakli

Aksoy

et al. 2021

International Journal of Life Sciences and Biotechnology

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ÖZETYeryüzünde insanlar tarafından en son keşfedilen, en yüksek, en soğuk, en kurak ve nüfus yoğunluğu en az olan kıta Antarktika'dır. Aynı zamanda yeryüzünün kullanılabilen tatlı su kaynaklarının yaklaşık % 70'i buz halinde bu kıtada bulunmaktadır. Bu özellikleriyle geçmişten günümüze insan yaşamı olmadığı halde canlı yaşama doğal seleksiyon ile devam etmiştir. Antarktika, üzerinde barındırdığı doğal yaşam habitatlarıyla, bilim insanları için sınırları tüm kıta olan eşsiz bir laboratuvar gibidir. Antarktika'da az sayıda olmakla birlikte kıtaya özgü olan hayvan ve bitki türleri ile çeşitli alg, liken ve mikroorganizma türleri bulunmaktadır. Bilim insanları bu canlı formları üzerinde araştırmalar yaparak, küresel ısınma ve çevre problemleri gibi güncel sorunlara bir çözüm aramaktadırlar. Kıtadan izole edilen bazı türler, enzimler ve genler kullanılarak başta biyolojik kontrol olmak üzere biyoteknoloji, biyoremidasyon gibi farklı alanlarda çalışmalar devam etmektedir. Bu çalışmada, Antarktikada gerçekleştirilen yaşam bilimleri ve biyoteknoloji araştırmaları gözden geçirilmiştir.

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Genome size constancy in Antarctic populations of Colobanthus quitensis and Deschampsia antarctica

Cited by 4 publications

References 30 publications

Genome size variation in Deschampsia cespitosa sensu lato (Poaceae) in Eurasia

Genome size variation in Deschampsia cespitosa sensu lato (Poaceae) in Eurasia

Repeatome Analyses and Satellite DNA Chromosome Patterns in Deschampsia sukatschewii, D. cespitosa, and D. antarctica (Poaceae)

Antarktika: Yaşam Bilimleri ve Biyoteknoloji Araştırmalarının Gözden Geçirilmesi

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