Aim. The research was aimed to allocate bread spring wheat lines of competitive strain testing with high adaptive potential to engage in research programs as a source material. Methods. Statistical. Results. Meteorological conditions during the period studied were contrast, which allowed to evaluate and highlight lines of bread spring wheat for adaptability. Based on the analysis of parameters of yield and its variability under the influence of environmental factors during the 2013–2015 lines with high adaptive capacity: Lutestsens 10-29, Lutestsens 11-26, Lutestsens 10-36, Erytrospermum 13-39, Lutestsens 08-26 were identified. Lines with high adaptive capacity Lutestsens 10-36, Erytrospermum 13-39, Lutestsens 08-26 was transferred to the State variety testing as Oksamyt Mironivs’kyi, MIW Oleksandra and Bozhena. Conclusions. Genotypic variability of performance elements of bread spring wheat lines of competitive strain testing was determined. The lines with high adaptive capacity were identified. Keywords: bread spring wheat, source material, productivity, adaptability.

The weather conditions in the two ecological zones Forest-Steppe and Polissia of Ukraine differed considerably in temperature regime and rainfed environments both during growing season as a whole and during particular phases of plant development. This made it possible to estimate spring bread wheat varieties by the levels of realizing their plant productivity potential. The productivity of spring wheat plants mainly depends on the growing zone (29.2%), hydrothermal vegetation conditions (16.3%), as well as their interaction (27.1%). There have been identified the varieties of spring bread wheat Simkoda myronivs'ka, Struna myronivs'ka, MIP Zlata (UKR), Koksa (POL), Leguan (CZE) with increased yield level that were recommended to be grown in ecological zones Forest-Steppe and Polissia. The calculation of ecological plasticity and stability allowed differentiating the varieties of spring bread wheat in accordance with their responsiveness to variatione of growing conditions as well as with adaptive potential. High plasticity by yield level under growing conditions of the Forest-Steppe and Polissia zones was determined in the varieties: Koksa (POL) (b i = 1.02), Simkoda myronivs'ka (UKR) (b i = 1.02), Granny (AUT) (b i = 1, 03), Heroinia (UKR) (b i = 1.01), Etiud (UKR) (b i = 1.02). These varieties may be characterized by adaptive properties as intensive ones with a pronounced response to the environment, i.e. relatively high grain yields may be resulted from a specific response to more favorable growing conditions. There were identified the most stable varieties for terms of yield in two ecological zones Yasna (POL), Siuita, Panianka, Kharkivs'ka 26, Elehiia myronivs'ka (UKR).

Âèâ÷èòè íàá³ð ïðîìèñëîâèõ ñîðò³â ïøåíèö³ ì'ÿêî¿ ÿðî¿ ð³çíîãî åêîëîãî-ãåîãðàô³÷íîãî ïîõîäaeåííÿ òà âèçíà÷èòè ñåðåä íèõ òàê³, ùî ìàþòü âèñîêèé ïîòåíö³àë ïðîäóêòèâíîñò³ â ð³çíèõ åêîëîã³÷íèõ çîíàõ âèðîùóâàííÿ. Ìåòîäèêà. Äîñë³äaeåííÿ ïðîâîäèëè âïðîäîâae 2016, 2017 ðð. ó äâîõ åêîëîã³÷íèõ çîíàõ Óêðà¿íè: ˳ñîñòåï (Ìè-ðîí³âñüêèé ³íñòèòóò ïøåíèö³ ³ìåí³ Â. Ì. Ðåìåñëà ÍÀÀÍ) ³ Ïîë³ññÿ (Íîñ³âñüêà ñåëåêö³éíî-äîñë³äíà ñòàíö³ÿ Ìèðîí³âñüêîãî ³íñòèòóòó ïøåíèö³ ³ìåí³ Â. Ì. Ðåìåñëà ÍÀÀÍ) íà 14 ñîðòàõ ð³çíîãî åêîëîãî-ãåîãðàô³÷íîãî ïîõîäaeåííÿ: Åëåã³ÿ ìèðîí³âñüêà, Ñòðóíà ìèðî-í³âñüêà, Õàðê³âñüêà 26, Ì²Ï Çëàòà, Ïàíÿíêà, ѳìêîäà ìèðîí³âñüêà, Åòþä, Ñþ¿òà, Ãåðî¿íÿ (UKR), Koksa, ßñíà (POL), Grànny (AUT), Leguan (CZE), Venera (SYR). Ñïîñòåðåaeåííÿ ³ îö³íêè â ïîëüîâèõ óìîâàõ ïðîâîäèëè â³äïîâ³äíî äî ìåòîäèêè äåðaeàâíîãî ñîðòîâèïðîáóâàííÿ. Ïîãîäí³ óìîâè 2016 ð. â çîíàõ ïðîâåäåííÿ äîñë³äaeåíü áóëè îïòèìàëüíèìè äëÿ ðîçâèòêó ðîñëèí ïøåíèö³ ÿðî¿. Ó 2017 ð. îïòèìàëüí³ ïîãîäí³ óìîâè ñïîñòåð³ãàëè â çîí³ Ïîë³ññÿ, à â ˳ñîñòåïó âîíè áóëè ïîñóøëèâèìè. Ðåçóëüòàòè. Ñåðåäí³é ð³âåíü óðîaeàéíîñò³ â óìîâàõ Ìèðîí³âñüêîãî ³íñòèòóòó ïøåíèö³ (˳ñîñòåï) ñêëàâ 3,61 ò/ãà ç êîëèâàííÿìè â³ä 3,14 (min) äî 4,20 ò/ãà (max). Á³ëüø âèñîêó âðîaeàéí³ñòü ñîðòè ñôîðìóâàëè íà Íîñ³âñüêèé ÑÄÑ Ì²Ï (Ïîë³ññÿ), äå çâîëîaeåííÿ â ïåð³îä âåãåòàö³¿ âèÿâèëîñü á³ëüø îïòèìàëüíèì (ÃÒÊ = 1,5). Óðîaeàéí³ñòü â óìîâàõ ñòàíö³¿ (ñåðåäíº 5,11 ò/ãà) âàð³þâàëà â³ä 4,62 (min) äî 6,03 ò/ãà (max). Âèñîêîþ ïîòåíö³éíîþ ïðîäóêòèâí³ñòþ õàðàêòåðèçóâàëèñÿ ñîðòè, ÿê³ ïåðåâèùèëè ð³âåíü óðîaeàéíîñò³ ñòàíäàðòó Åëåã³ÿ ìèðîí³âñüêà â çîíàõ ˳ñîñòåïó (̲Ï) ³ Ïîë³ññÿ (Íîñ³âñüêà ÑÄÑ Ì²Ï): ѳìêîäà ìèðîí³âñüêà, Ñòðóíà ìèðîí³âñüêà, Ì²Ï Çëàòà, Ïàíÿíêà (UKR), Leguan (CZE), Koksa (POL). Âèñíîâêè. Ñåðåä äîñë³äaeóâàíèõ ñîðò³â ïøåíèö³ ì'ÿêî¿ ÿðî¿ ð³çíîãî åêîëîãî-ãåîãðàô³÷íîãî ïîõîäaeåííÿ âèä³ëåíî êðàù³, ùî õàðàêòåðèçóþòüñÿ âèñîêèì ïîòåíö³àëîì ïðîäóêòèâíîñò³:

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