The article provides results of efficiency of double screening by quantity of normally developed germs affected of unfavorable abiotic factors, namely decreased temperatures of seeds sprouting and embryogenesis at extremes (heat, shortage of water).

The article highlights economical value of sorghum vulgaris, accession to the market of varietal sources. It provides description of productivity and new varieties of sorghum vulgaris bicolor listed in the State Register of Varieties Suitable for Dissemination in Ukraine.

Наведено результати наукових досліджень з вивчення продуктивності сортів рису селекції при їх вирощуванні в різних екологічних пунктах Південного Степу України. Доведено, що важливою рисою сучасних сортів є скорочення тривалості цвітіння та вегетаційного періоду, а зростання середнього рівня урожайності відбувається завдяки стабілізації величини врожаїв, одержаних в роки з несприятливими умовами вирощування.

The article shows experimental data of interline hybrids of sugar beet on the basis of weight of 1000 seeds, genetic determination of characteristic based on the method of Hayman and topcrossed polytested crossbreeding is established, their comparison is made. It also highlights valuable hybrid combinations and valuable for combining pollinating lines used in the breeding to enhance properties of sowing seeds.

The article explains meaning of successive introduction of plants followed by their integration into cultivation, and scientifically grounded development of national varietal sources from the diversity of plants taking into account methodological aspects of practical application of botanical semantic, classification and binary nomenclature of botanical taxa. It also shows scientific aspects of systematic units differentiation caused by relevant Latin names of botanical taxa, which are to facilitate harmonization of UPOV membertates cooperation in the protection of rights of intellectual property on breeding achievements – plant varieties.

The article features results of studying F1 hybrids of tomato inheriting productivity factors. 21 original hybrid forms and 57 F1 tomato hybrids in green-house have been studied. The efficiency of selecting genotype of valuable plants by genotype is substantiated.

The article describes Agro-ecological features of winter triticale variety Vivate Nosivskyi developed by means of individual selection based on hybrid combination ([Avgusto x NE 312] x К 9844) at the Examination Facility of Nosivska Breeding and Testing Station ofChernigivIAPPIAAN and selected by quantitative (grain productivity, quantity and weight of grains per ear, cup weight of grain, 1000 kernels weight), qualitative (protein contain, «raw» gluten) parameters of grain yield, by adaptability to a range of causative agents, abnormal events in winter-spring and summer, lodging. It shows that bio-agents of microbe preparations Azospirillum brasilense и Achromobacter album 1122 on initial stages of development of winter triticale variety Vivate Nosivskyi plants enhance nitrogen and phosphor nutrition as reflected in raw and dry weight of plants increased by 1,5 to 2,5 times, area of leaf surface - 2 to 2,4 times, grain yield -1,1-1,3 times.

The review of legal regulation of state testing, registration of plant varieties based on genetically modified organisms in Ukraine and the European Union. Defined problems, namely the problem of harmonization of legislation, the actual Ukraine's lack of specific legislation in the area of biosafety for GMO handling, lack of clear procedures for registration of GMOs and others.

In the article was analyzed the system of organization variety examination in one of the most economic development state-member of Union for plant varieties of Plants - Federal Republic of Germany. The structure of administrative authority of plant variety protection - Bundessortenamt and variety testing station enlightened, suggested specific economic indices that could be an example for formation and development national breeding and seed production.