The rate of variability of functional male sterility (ps–2) depending on year of study, genotype and age of the plant is shown. The efficiency of the method of forced ejection of pollen from intact anthers to increase the degree of sterility is shown. The five tomato hybrids developed based on selected lines were submitted for the state variety trial of Moldova.

The potato is one of the main strategic crops in the Russian Federation, Belarus and Kazakhstan. Currently, we have achieved significant advances in the understanding of metabolic mechanism of carbohydrate and interconversion «sucrose – starch» in potato tubers. Sucrose synthase (Sus) is a key enzyme in the breakdown of sucrose. Sucrose synthase (Sus) is catalyzing a reversible reaction of conversion sucrose and UDP into fructose and UDP-glucose. The identification and subsequent characterization of the genes encoding plant sucrose synthase is the first step towards understanding their physiological roles and metabolic mechanism involved in carbohydrate accumulation in potato tubers. In the present work the nucleotide and amino acid polymorphism of the Sus4 gene fragments containing sequences of the sucrose synthase domain were analyzed. Sus4 gene fragments (intron III – exon VI) in 9 potato cultivars of Russian, Kazakh and Belarusian breeding were analyzed. The polymorphism of the Sus4 sucrose synthase domain sequences was first examined. The length of analyzed fragment varied from 977 b.p. (cultivars Favorit, Karasaiskii, Miras) to 1013 b.p. (cultivars Zorochka, Manifest, Elisaveta, Bashkirskii). It was demonstrated that the examined sequences contained point mutations, as well as insertions and deletions. The common polymorphism level was 5.82%. It was shown that the examined sequences contained 58 SNPs and 4 indels. The most variable were introns IV (12.4%) and V (9.18%). The most variable was exon IV. 7 allelic variants were detected. 6 different amino acid sequences specific to different varieties were also identified.

The assortment of salad crops, process parameters for production of seedlings (Baby leaf) and sprouts (Microgreens) is presented. The principles of the selection and sale of salad crops in the local market are recommended.

Momordica (Momordica charantia L.) is unconventional crop of the Cucurbitaceae family for the central regions of the Russian. Fruits of this crop have anti-inflammatory and immunomodulatory effect. The influence of promising growth regulators from plants on the qualitative composition of fruits momordika has been studied. The positive effect of leaf extract yakon as phytoregulator on productivity increasing and fruit quality of momordika is shown.

Professor Dryagina Irina Viktorovna – 95th Anniversary.

Results of study of the collection accessions of red beet with different level of bolting resistance are presented. Nature of inheritance of this trait in progeny, and also its connection with other biological and economically valuable characters and properties is shown. Bolting resistant accessions and possibility of its use in breeding are described. The promising initial material is selected and recommended. The most rational solution of the bolting problems in the beet is the development of resistant varieties and hybrids. For this purpose, the early-spring and under-winter planting are used, as well as the seed germination at low (30C) temperatures. The availability of the various initial material studied by modern methods of researches plays a key role. When the collection accessions of beet were studied in the VIR Polar branch (The Murmansk Region), the following genotypes were identified: 1 – non bolting, 2 – weak bolting (less than 10% of bolting plants), 3 – moderately bolting (10-50%), and 4 – high bolting (more than 50% of bolting plants). As a result of screening of a gene pool, the genetic sources of bolting resistance of beet were identified. At its crossing with bolting accessions the dominance of the trait «bolting» and monogenic nature of its inheritance are confirmed. For the purpose of beet breeding for bolting resistance, the symphycarpous varieties characterized by complex biological and agronomic characters (increased yield, cold tolerance, quality of production and resistance to blackleg) are the most usable. The cultivars Banko from Sweden (donor), Podzimnyaya A-0474 (VNIISSOK) and Polyarnaya ploskaya-249 (Polar branch VIR) are recommended as a genetic sources of bolting resistance.

Results of two yeaґs field studying of 522 samples of peas are presented. Twenty-five samples with valuable agronomic traits were selected for further breeding program. Correlation between duration of interstage periods was revealed.