Karyological Study of Siberian Larch Species Larix sibirica and Larix gmelinii in Taimyr

A comparative study of karyotypes of two Siberian species of larch— L. sibirica and L. gmelinii —growing in the zone of forest-tundra on the Taimyr Peninsula was carried out. The number of chromosomes has been analyzed and the increase in chromosomal instability in larches in forest-tundra condition...

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Bibliographic Details
Published in:Cytology and genetics 2019-05, Vol.53 (3), p.202-211
Main Authors: Sedel’nikova, T. S., Pimenov, A. V.
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biomedicine
Chromosome rearrangements
Chromosomes
Genomic instability
Human Genetics
Karyotypes
Larix sibirica
Localization
Polyploidy
Species
Tundra
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Summary:A comparative study of karyotypes of two Siberian species of larch— L. sibirica and L. gmelinii —growing in the zone of forest-tundra on the Taimyr Peninsula was carried out. The number of chromosomes has been analyzed and the increase in chromosomal instability in larches in forest-tundra conditions has been shown. The size and morphology of chromosomes and the localization and frequency of secondary constrictions in chromosomes of L. sibirica and L. gmelinii were estimated. The parameters of chromosomes in polyploid cells of L. gmelinii were studied. The asymmetry of karyotypes of L. sibirica and L. gmelinii was analyzed. The spectrum and frequency of chromosome rearrangements in L. sibirica and L. gmelinii were studied. Using the data of the karyological analysis, the issues of differentiation and adaptation of the investigated larch species in Taimyr are discussed.
ISSN:0095-4527
1934-9440
DOI:10.3103/S0095452719030046