KARYOLOGICAL CHARACTERISTICS OF ABIES SIBIRICA IN THE MIDDLE SIBERIA
O. V. Kvitko, E. N. Muratova
V. N. Sukachev Institute of Forest, Siberian Branch of RAS, Krasnoyarsk;
e-mail: kvitko@ksc.krasn.ru
Data on Abies sibirica karyotype structure have been obtained in five populations of Middle Siberia. Chromosome set (2n = 24) consists of 7 pairs of
metacentric (I-VII), 4 pairs of submetacentric (VIII, X-XII) and a pair of intercentric (IX) chromosomes. Morphometric parameters of chromosome groups are similar in the
populations studied. Variation of Abies sibirica chromosome characteristics is low. Intraspecific chromosome polymorphism of A. sibirica is substantially
connected with variation of the number of NOR-chromosome in the karyotype and with location of NOR in chromosome arms. Mixoploidy, somatic reduction of chromosomes,
and a triploid seedling of A. sibirica have been registered on the territory with antropogenic press.
Key words: Abies sibirica, karyotype, second constrictions, nucleoli, mixoploidy, polyploidy, somatic reduction of chromosomes
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