Genome variability in plant somatic cells. 2. Natural variability

Кунах, В. А.

doi:10.7124/bc.000400

Cited by 8 publications

(2 citation statements)

References 110 publications

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“…Such karyological heterogeneity is consistent with observations of gametoclonal variants of triticale, wheat, rice. and other species (Kunakh, 1995).…”

Section: Resultsmentioning

confidence: 95%

Production and Performance of Gynogenetic Sugarbeet Lines

Svirshchevskaya¹,

Doležel²

2000

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In vitro techniques were used to obtain haploid and doubled haploid lines of gynogenetic origin in sugarbeet (Beta vulgaris L.). Two pathways of regeneration were available for unfertilized ovule culture-embryogenesis and organogenesis. Regenerants were obtained from pri mary explants of diploid and tetraploid donor plants on MS nutrient medium supplemented with benzyla minopurine and sucrose. Flow cytometry indicated spontaneous polyploidization in all primarily haploid ovule-derived lines that originated from Belarusian culti vars. Mixoploidy that occured in doubled haploids was overcome through micropropagating apices of generative shoots. Performance of sugarbeet plants of ovule origin and hybrids produced with these lines indicated that prom ising breeding lines could be selected from gynogenetic lines.

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“…Such karyological heterogeneity is consistent with observations of gametoclonal variants of triticale, wheat, rice. and other species (Kunakh, 1995).…”

Section: Resultsmentioning

confidence: 95%

Production and Performance of Gynogenetic Sugarbeet Lines

Svirshchevskaya¹,

Doležel²

2000

JSBR

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“…The karyological analysis showed that mixoploidy was revealed in half of the studied samples. Some researchers believe that mixoploidy is associated with the adaptation of plants to unfavourable environmental conditions (Kunakh, 1995;Sedel'nikova et al, 2010;Kunakh, 2011). Thus, the appearance of polyploid cells can be considered as one of the regulatory mechanisms that allow maintaining a certain level of population resistance in extreme environmental conditions (Muratova and Sedel'nikova, 2004).…”

Section: Discussionmentioning

confidence: 99%

The cytogenetic parameters of Pinus sylvestris L. under conditions of the Far North of Russia (Karelia)

2021

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The cytogenetic analysis of the Pinus sylvestris L. seed progeny in the forests of the northern taiga in the Far North of Russia conditions was carried out. Two Pinus sylvestris populations growing in Ambarnskoy and Pyaozerskoy forest divisions of Loukhsky district of Karelia Republic were studied. The number of chromosomes, the frequency and types of mitosis disturbances at the metaphase, anaphase and telophase (as a percentage of the total number of dividing cells at the same stages), and the frequency of micronuclei occurrence, as well as the laboratory seed germination, were studied. As a result of the study, it was found that 50–56% of the studied sprouts were mixoploid. Analysis of mitosis showed that the root meristem of the studied samples contained cells with various pathologies; simultaneously, the frequency of mitosis pathologies in the Ambarnskoy population was significantly higher than in the Pyaozerskoy one. It amounted to 6.8 ± 0.4 and 4.9 ± 0.4%, respectively. Nine types of abnormalities were identified; chromosome overrun and bridges prevailed. Micronuclei were registered in 35–38% of the studied Pinus sylvestris sprouts. At the same time, the proportion of cells with micronuclei in the Ambarnskoy population was 2-fold higher than in the Pyaozerskoy one and averaged 0.12 ± 0.03% and 0.07 ± 0.02%, respectively.

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