<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The goal of our work was to assess the ability of hybrid apple seedlings and their parent forms to maintain frost resistance during the thaw period, by using artificial freezing methods. Apple resistance was studied in the laboratory by modelling the damage factors of the frost resistance component III with the use of a climatic chamber. All of the studied hybrid apple seedlings from all used crossing combinations showed a sufficient level of frost resistance under modelling of a three-day artificial thaw (+2 °C) with subsequent temperature lowering to –25 °C. The damage of bark, cambium and wood in all of the studied hybrid seedlings was reversible and did not exceed a 2.0 point rating on a 5-point scale. The temperature rise up to +2 °C during three days in February did not cause the activation of growth processes in buds and bark and did not dramatically affect hybrid apple seedlings. According to the results of the artificial freezing, hybrid apple seedlings of the 6026 family (‘Imrus’ × ‘Krasa Sverdlovska’) and hybrids of the 6030 family (‘Svezhest’ × ‘Pepin Orlovsky’) showed the largest potential frost resistance after a thaw in winter.</p>
</abstract>

The goal of our work was to assess the ability of hybrid apple seedlings and their parent forms to maintain frost resistance during the thaw period, by using artificial freezing methods. Apple resistance was studied in the laboratory by modelling the damage factors of the frost resistance component III with the use of a climatic chamber. All of the studied hybrid apple seedlings from all used crossing combinations showed a sufficient level of frost resistance under modelling of a three-day artificial thaw (+2 °C) with subsequent temperature lowering to –25 °C. The damage of bark, cambium and wood in all of the studied hybrid seedlings was reversible and did not exceed a 2.0 point rating on a 5-point scale. The temperature rise up to +2 °C during three days in February did not cause the activation of growth processes in buds and bark and did not dramatically affect hybrid apple seedlings. According to the results of the artificial freezing, hybrid apple seedlings of the 6026 family (‘Imrus’ × ‘Krasa Sverdlovska’) and hybrids of the 6030 family (‘Svezhest’ × ‘Pepin Orlovsky’) showed the largest potential frost resistance after a thaw in winter.

Frost Resistance Potential of Hybrid Apple Seedlings of Russian Research Institute of Fruit Crop Breeding after Artificial Thawing

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The goal of our work was to assess the ability of hybrid apple seedlings and their parent forms to maintain frost resistance during the thaw period, by using...

Frost Resistance Potential of Hybrid Apple Seedlings of Russian Research Institute of Fruit Crop Breeding after Artificial Thawing

Published Online: Oct 14, 2022

Page range: 505 - 511

Received: Jul 14, 2021

Accepted: Aug 02, 2022

DOI: https://doi.org/10.2478/prolas-2022-0078

Keywords
genotype, artificial freezing, winter hardiness component III

© 2022 Zoya Ozherelieva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Frost Resistance Potential of Hybrid Apple Seedlings of Russian Research Institute of Fruit Crop Breeding after Artificial Thawing

Published Online: Oct 14, 2022

Page range: 505 - 511

Received: Jul 14, 2021

Accepted: Aug 02, 2022

DOI: https://doi.org/10.2478/prolas-2022-0078

Keywordsgenotype, artificial freezing, winter hardiness component III

© 2022 Zoya Ozherelieva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
genotype, artificial freezing, winter hardiness component III