Tag Archives: homeostaticity

334–357 O. Mazur, R. Kravets, I. Didur, O. Mazur, V. Tsyhanskyi and Y. Chepernaty
Adaptability of soybean varieties assessed through symbiotic activity under different soil-climatic conditions
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Adaptability of soybean varieties assessed through symbiotic activity under different soil-climatic conditions

O. Mazur¹, R. Kravets², I. Didur¹, O. Mazur¹, V. Tsyhanskyi¹ and Y. Chepernaty¹

¹Vinnytsia National Agrarian University, Educational and Scientific Institute of Agrotechnology and Environmental Sciences, 3 Soniachna Str., UA 21008 Vinnytsia, Ukraine
²Vinnytsia National Agrarian University, Department of Ukrainian and Foreign Languages, 3 Soniachna Str., UA 21008 Vinnytsia, Ukraine
*Correspondence: sashamazur1978@outlook.com

Abstract:

The purpose of this work reveals itself in distinguishing ontogenetic adaptation parameters according to the symbiotic performance indicators of soybean varieties for the introduction of such varieties into production and as source material for the development of new soybean varieties with high and stable nitrogen-fixing capacity. The research was conducted in different soil-climatic regions of Ukraine, enabling the assessment of soybean variety responses to varying ecological conditions. Indicators of the active symbiotic apparatus and the amount of biologically fixed nitrogen were determined using the Volkohon methodology. Adaptability of the researched varieties was assessed by their symbiotic potential considering the method developed by Eberhart and Russell. The study presents the scientific results on the assessment of soybean varieties by adaptability of active nodules and their mass, active symbiotic potential, and accumulation of biologically fixed nitrogen. The highest amount of biologically fixed nitrogen was recorded in such varieties as Hoverla – 101.12 ± 0.39 kg ha-1, Artemida – 98.07 ± 0.38 kg ha-1, Amethyst – 95.51 ± 0.38 kg ha-1 and Vezha – 93.40 ± 0.38 kg ha-1, respectively. Despite the different reaction of varieties to fluctuations in environmental conditions, the selected varieties were distinguished by high stability of the formation of the amount of biologically fixed nitrogen. In the Vezha and Amethyst varieties, the stability index (Si2) was as close to zero as possible. Although the varieties differed in their responses to environmental fluctuations, the selected Hoverla, Artemida, Amethyst and Vezha soybean varieties demonstrated high stability in biologically fixed nitrogen accumulation and were recommended for the development of new soybean varieties, considering their stable realization under different soil-climatic growing conditions.

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2627-2638 O.V. Tryhub, А.V. Bahan, S.M. Shakaliy, Yu.M. Barat and S.О. Yurchenko
Ecological plasticity of buckwheat varieties (Fagopyrum esculentum Moench.) Of different geographical origin according to productivity
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Ecological plasticity of buckwheat varieties (Fagopyrum esculentum Moench.) Of different geographical origin according to productivity

O.V. Tryhub¹, А.V. Bahan², S.M. Shakaliy³*, Yu.M. Barat² and S.О. Yurchenko²

¹Ustymivska Experimental Station of Plant Production of Plant Production Institute nd.a. V.Ya. Yuryev of National Academy of Agrarian Sciences of Ukraine, Ustymivka village, Hlobynskyi district, UA36003 Poltava region, Ukraine
²Poltava State Agrarian Academy, Faculty of Agro-Technology and Ecology, Department of Selection, Seed Science and Genetics, 1/3, Skovorody str., UA36003 Poltava, Ukraine
³Poltava State Agrarian Academy, Faculty of Agro-Technology and Ecology, Department of Plant Production, 1/3, Skovorody str., UA36003 Poltava, Ukraine
*Correspondence: shakaliysveta@gmail.com

Abstract:

To determine the ecological plasticity of crop varieties, there are a number of methods that are based on the analysis of the variability of the trait by contrasting years under the conditions. The stability and plasticity of the studied traits of varieties are due to the ability of genetic mechanisms of plants to minimize the consequences of the negative impact of the environment, that is, to resist them. The researches on establishing regularities of manifestation of plasticity, stability and homeostaticity of buckwheat varieties of different ecological and geographical origin were carried out in the conditions of the central part of Ukraine during the period of 2016–2018. The low adaptability of modern buckwheat varieties is a determining factor for low production yields of potentially high-yielding varieties in the sharply contrasting (climatic factors) cultivation conditions. The level of yield (as a complex characteristic) and its main component, the individual productivity of the plant have been determined as the differentiative indicators of modern varieties and new promising breeding material consisting of 35 samples from 5 countries of the world. The analysis of research data has identified a group of varieties (SYN 3/02, Sofiia, Selianochka, Slobozhanka, Yelena, Roksolana, Populiatsiia 7/07, P-330, P-455, P-620, Ametist, Feniks, Ilishevskaia, Batyr and Arno), which have a value as a highly adaptable varietal material for the cultivation conditions and have an increased selective value according to abiotic adaptability indicators and can be used to create a more adaptable material as a potentially more productive as well as more plastic and stable resource for selection.

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