title: [Supernumerary chromosomes in the karyotype of the Siberian spruce, P. obovata].
abstract: Results of karyological study of ornamental forms of Picea obovata Ledeb. are presented. Typical chromosome number (2n) is 24, but some trees have one or two additional chromosomes (2n = 24 + 1B; 2n = 24 + 2B). Heritability of additional chromosomes, pollen fertility, morphological features of cones, and seed quality in trees with and without additional chromosomes were studied. System of B-chromosomes is of importance for population and species adaptation and possibly plays a role in adaptation of P. obovata under introduction.
authors.forename: E N
authors.initials: EN
authors.lastname: Muratova
authors.forename: O S
authors.initials: OS
authors.lastname: Vladimirova
mesh_terms: D000782:Aneuploidy; D002875:Chromosomes / Q000235:genetics*; D014644:Genetic Variation; D007621:Karyotyping; D028222:Picea / Q000235:genetics*; D012800:Siberia; D013045:Species Specificity