The ecological adaptation of new spring canola varieties in different environmental conditions
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The study of phenotypic plasticity and stability, according to which the potential of new spring canola varieties adaptability for agroecological technology of spring canola growing in the strategy of intensification of plant production is actual. The new canola varieties, which were included in the State register of plant varieties suitable for dissemination in Ukraine was studied. Field studies were carried out in 2018–2019 on the testing sites of the Ukrainian Institute for Plant Variety Examination in Forest and Forest Steppe zones of Ukraine. The phenotypic plasticity and stability analysis for yield, 1,000 seeds weight, protein and oil content were carried out according to the Eberhart and Russell approach. As results of this study, it was determined that for yield Cleopatra and SAOKER CL varieties are considered as stable. CEBRA CL and Lavina varieties are characterized stability of 1,000 seeds weight during studied years. According to the Wricke's ecovalence deviation and standard deviation Lavina, Lakritz and CEBRA CL varieties consider as intensive type varieties for yield; for 1,000 seeds weight - Cleopatra and SAOKER CL varieties. According to standard deviation for protein and oil content CEBRA CL and SAOKER CL varieties are considered as highly adapted. Cleopatra, Lavina and Lakritz are stable for protein content. For oil content CEBRA CL and SAOKER CL varieties are considered as stable. For protein content CEBRA CL and SAOKER CL varieties are intensive. Thus, spring canola varieties, which are intensive for studied characteristics, respond positively to an improvement of growing conditions.