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The 1985 introduction into the European North of Russia resulted in the formation of a large stock of pink salmon of the odd-year broodline. To assess the divergence of the new population and the role of various microevolutionary factors, variation of four microsatellite loci and fifteen genes encoding proteins (allozymes) in samples of fish, running for spawning in rivers of the new area, and in samples from the donor population of the Ola River (Magadan region). In the generations 8 and 9 of the introduced pink salmon of the odd-year line, the genetic diversity (the number of alleles and the mean heterozygosity) both at allozyme and at microsatellite loci was significantly lower, than that in the donor population. The explanations of the decline in diversity are discussed. The first evidence for spatial genetic divergence in transplanted fish within the new area has been obtained; the divergence level may be comparable with that characteristic of native populations. 相似文献
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Genetic parameters of pink salmon introduced into the White Sea basin in 1985 and 1998 were compared to the corresponding parameters of the donor population from the Ola River (Magadan oblast). The detected genetic differences indicate that colonization of a new area is accompanied by impoverishment of the gene pool of the native population. This effect was particularly marked in the odd-year line of pink salmon introduced in 1985. The probable causes of these genetic changes are discussed. 相似文献
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Distribution alleles of sAAT-1,2 * isoloci in brown trout Salmo trutta populations of northern Europe revealed two glacial refugia, 'Baltic' and 'Atlantic'. 相似文献
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Tarasov VA Aslanian MM Tsyrendorzhieva ES Gar'kavtseva RF Liubchenko LN Altukhov IuP Mel'nik VA 《Genetika》2005,41(8):1115-1124
Polymorphism of two tumor-suppressor genes, BRCA1 and P53, was examined. DNA was extracted from blood leukocytes of the women affected with breast cancer (N = 151) and of the women with no clinical symptoms of tumor diseases (N = 191). Typing of the polymorphic variants was performed using PCR-RFLP method. It was demonstrated that the genetic structure of the patient group (taking into consideration BRCA1 and P53 polymorphic variants) differed from that of the control group. The group of genotypes, found exclusively among the patients, as well as the group of "resistant" genotypes revealed predominantly among the controls, was described. Detection of the genotype A1A1 B1B1 S1S1 C1C1 F1F1 J2J2, whose frequency in control group was eight times higher than in the patient group, was an additional confirmation of the existence of "resistant" genotypes. These findings point to the association between the combinations of the BRCA1 and P53 allelic variants and the risk of breast cancer. 相似文献
27.
Identification of palearctic coregonid fish species using mtDNA and allozyme genetic markers 总被引:7,自引:0,他引:7
D. V. Politov N. Yu. Gordon K. I. Afanasiev Yu. P. Altukhov J. W. Bickham 《Journal of fish biology》2000,57(SA):51-71
Two types of molecular genetic markers were used for genetic identification of species and local stocks of palearctic coregonids (Coregonidae, Salmoniformes, Teleostei). Seven nominate species of whitefishes and ciscoes Coregonus , spp. of Eurasia Arctic Sea basin and inconnu Stenodus leucichthys nelma , represented by specimens from North America were studied. Using restriction analysis of PCR-amplified products of the ND-1 gene of mitochondrial DNA (mtDNA) and allelic composition at several allozyme loci discrimination was successful between C. lavaretus pidschian , Siberian whitefish, C. nasus , broad whitefish, C. autumnalis , Arctic cisco, C. migratorius , Baikal omul, C. peled , peled, and C. sardinella , least cisco. Muksun C. muksun , was indistinguishable from Siberian whitefish. Creatine kinase (CK) isozyme patterns and Rsa , I restriction patterns of ND-1 were the most effective markers allowing discrimination among species. Intra-specific differentiation in mtDNA was found in all species but was much less pronounced than inter-species variation. In several specimens composite haplotypes typical of another species were found that reflect probable gene introgression by hybridization. A combination of mtDNA and nuclear genetic markers is suggested for reliable identification of both typical species representatives and hybrids. 相似文献
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Plasma Physics Reports - The dynamics of spectra formation was studied experimentally using radar stroboscopic time-of-flight measurements. Both conventional fluctuation reflectometry spectra... 相似文献
29.
Lashkul S. I. Altukhov A. B. Gurchenko A. D. Gusakov E. Z. Dyachenko V. V. Esipov L. A. Konovalov A. N. Kuprienko D. V. Shatalin S. V. Stepanov A. Yu. 《Plasma Physics Reports》2022,48(5):453-461
Plasma Physics Reports - Experiments on the lower hybrid current drive (LHCD) were performed in plasma of the FT-2 tokamak at the microwave pulse duration of ΔtRF ≤ 20 ms covering the... 相似文献
30.
Hybridization between Atlantic Salmon Salmo salar L. and Brown Trout S. trutta L. upon Artificial Propagation 总被引:1,自引:1,他引:0
Makhrov A. A. Artamonova V. S. Christoforov O. L. Murza I. G. Altukhov Yu. P. 《Russian Journal of Genetics》2004,40(11):1258-1263
Samples of Salmo salar and S. trutta were examined in 12 Russian fish hatcheries. With protein markers, hybrids of the two species were found in three hatcheries of the Baltic Sea basin. Some fishes had a phenotype intermediate between theS. salar and S. trutta phenotypes by morphological traits, but did not differ genetically from one of the parental species. Possible consequences of hybridization and ways to prevent it are discussed. 相似文献