I. I. Korshikov

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Based on analysis of variation at ten allozyme loci in three age groups (25–35, 40–80, and more than 100 years of age) of plants and in seed embryos, demographic dynamics of the gene pools was studied in a small (60.5 ha) isolated relict population of chalk pine Pinus sylvestris var. cretacea Kalenicz. ex Kom. from the steppe zone of Ukraine. The observed(More)
In the Crimea Mountain population of Pinus pallasiana D. Don, the genetic structure of adult plants and embryos was studied along an elevation gradient (150, 400, 600, and 900 m a.s.l.). Ten polymorphic loci of six enzyme systems were examined. The degree of differentiation of plants from different elevations and their progeny with respect to genetic(More)
The genetic control of nine enzyme systems has been analyzed in the preserved juniper species (Juniperus excelsa Bieb.) from a natural population of the Mountain Crimea. Isozymes were extracted from endosperms of the haploid seeds to be studied by electrophoresis. As a result 16 loci have been identified, of which 14 loci were polymorphic (Gdh, Got-1,(More)
Based on electrophoretic analysis of 21 isozyme loci controlling 10 enzyme systems, the intra- and interpopulation variation was studied in two peat-bog and three dry-meadow populations of the dwarf mountain pine Pinus mugoTurra from the highlands of the Ukrainian Carpathians. In the studied samples (a total of 164 trees), on average 62% of the studied(More)
The article provides the analysis of the maintenance stability of genetic structure of generatively young and middle-aged trees in seed progenies formed during two years in Donbass population of Pinus sylvestris var. cretacea Kalenicz. ex Kom. protected in Ukraine. The analysis has been carried out at 10 allozyme loci. Allele and genotype diversity of the(More)
Using electrophoretic analysis of 22 isozyme loci controlling ten enzyme systems, we studied intrapopulation and interpopulation variation of Scots pine Pinus sylvestris L. in the main forest regions of Ukraine. In 15 of the populations examined, 76.5% of genes were polymorphic, and an average plant was shown to be heterozygous at 23.2% of the genes. The(More)
A comparative analysis of allozyme variability has been conducted for 10 polymorphic loci of samples of seeds and maternal plants characterized by significant differencies in productivity of empty and full-grained seeds in Pinus pallasiana D. Don population in Crimea. It has been determined that allele diversity is fully reproduced in seed progeny of plants(More)
The genetic control of 9 enzymous systems in 46 trees of Pinus pityusa Stev. of two isolated Crimean populations was studied using electrophoretic separation of izsozymes in vertical plates of polyacrylamide gel. The detailed description of electrophoretic spectra of ADH, ACP, DIA, GOT, GDH, LAP, MDH, FDH, and SOD encoded by 20 loci is presented. The(More)
Allozyme variation at ten polymorphic loci and mating system was studied in three small isolated relict populations (4.4 to 22 ha) and in three artificial stands of Pinus sylvestris from the Kremenets Hill Ridge and Maloe Poles’e. It was established that the mean heterozygosity of 130 to 140 year-old trees from natural populations (H O = 0.288; H E = 0.277)(More)
Polymorphism of young (14–16 years), middle-aged (70–80 years) and old (120–150 years) plants and their seed embryos have been studied using 10 and 20 allozyme loci from a population of Pinus Pallasiana D. Don from Mountain Crimea. It was determined that the old-aged trees had significantly lower level of expected heterozygosity of embryos in comparison(More)