1Krasnoyarsk State Agrarian University, Mira Ave., 90, Krasnoyarsk, 660049, Russia
Institute of Forest, Russian Academy of Sciences, Siberian Branch, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Akademgorodok 50/28, Krasnoyarsk, 660036, Russia
*Corresponding Author: Elena N. Muratova, Institute of Forest, Russian Academy of Sciences, Siberian Branch, Federal Research Center Krasnoyarsk Science Center SB RAS, Akademgorodok 50/28, Krasnoyarsk, 660036, Russia, E-Mail: elena-muratova@ksc.krasn.ru
Online published on 9 August, 2023.
This paper deals with the karyotype study on Larix sibirica from Mongolia. Diploid chromosome number was established (2n = 24). Karyotype included 6 pairs (I-VI) of metacentric chromosomes and 6 pairs (VII-XII) of sub-metacentric chromosomes. Secondary constrictions were observed in eight chromosomes; interphase nuclei included from 1 to 8 nucleoli. Mean size of chromosomes of the first group is 12.8 mm, mean size of the chromosomes of the second group is 8.5 mm. Karyotype formula of L. sibirica from Mongolia is 2Msc+2M+2Msc+1Smsc+1Sm+4Smsc.Chromosomes of this species were analyzed using fluorescence in situ hybridization (FISH) with 45S and 5S ribosomal RNA gene probes. Mixoploidy and chromosome irregularities such as ring chromosomeswere also observed.
Larix sibirica, Conifers, Karyotype, Chromosomes, Secondary constrictions, Nucleoli, Genome, Chromosome mutations
