[IRAP-and REMAP-analyses of barley varieties of Odessa breeding].

Application of polylocus biallelic systems of PCR along with monolocus SSR-analysis is very promising approach for detailed characterization, differentiation and identification of crop varieties. Microsatellite sequences and LTR retratransposon fragments are known to be the most variable in plant genome. They can be used in PCR analysis as IRAP and REMAP. Conditions of IRAP and REMAP analyses of intra- and intervariety polymorphism of the barley varieties of Odessa breeding have been elaborated. The detailed genotype formulas are represented which reflect the intravariety polimorphism and make it possible to detect the changes in variety structure in the course of seed production process.

[Molecular-genetic identification and certification of soybean (Glycine max L.) cultivars]. / Molekuliarno-geneticheskaia identifikatsiia i paspoprtizatsiia sortov soi (Glycine max L.).

An approach to certification of soybean genotypes has been developed. The procedure employs three methods of DNA analysis based on polymerase chain reaction (PCR): PCR with arbitrary primers (AP PCR), simple sequence repeat polymorphism (SSRP) analysis, and inter-simple sequence repeat (ISSR) analysis. The approach to certification proposed may be used in both genetic and breeding research and seed production. A "certificate" form that reflects the unique characteristics of each cultivar studied is proposed. The results of molecular genetic analysis of allele distribution in genotypes of soybean from different ecological geographic zones permit estimation of the adaptive significance of individual alleles.

[Molecular and genetic polymorphism of cultivated soybean detected by AP-PCR, SSRP and SSR]. / Molekuliarno-geneticheskii polimorfizm soi, detektirovannyi PP-PTsR, SSRP i ISSR.

Molecular-genetic polymorphism of cultivated soybean from different geographic regions was analysed using three PCR methods (AP-PCR, SSRP and ISSR). The dendrogram of phenogenetic relationship was constructed on the base of obtained data. The allocation of varieties are in a good agreement with pedigree information. Main parameters such as polymorphism level, expected heterozygosity, and marker index were calculated. It was shown that ISSR is the method of choice for the differentiation of soybean varieties.

[Nucleotide sequence of the Escherichia coli B38 flagellin gene]. / Nukleotidnaia posledovatel'nost' gena flagellina Escherichia coli B38.

The fliC gene of the E. coli B38 flagellin has been cloned and its nucleotide sequence determined using the terminator method. According to the sequencing data, the flagellin contains 565 amino acid residues which exceeds by 65 residues the number of amino acid residues in the earlier decoded E. coli K12 flagellin. Strong homology was observed in the two flagellins among the 160 initial and 89 tail-ended residues, whereas the central, variable parts showed no homology. Similar to the K12 flagellin, the B38 flagellin has no serines, cysteines or tryptophans. The variable part of the fliC E. coli B38 gene contains a Chi-site which initiates the genetic recombination in E. coli and related species.