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An Efficient Micropropagation System for the Vulnerable Wild Apple Species, Malus sieversii, and Confirmation of Its Genetic Homogeneity

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Abstract

Traditional cultivation methods used for domestic apples are not effective when applied for cultivation of the vulnerable wild apple Malus sieversii. However, this apple can be effectively grown using micropropagation, which is an established ex situ conservation tool. The study aimed to grow in vitro M. sieversii cultures using axillary buds as explant. To optimize the media and plant growth regulator combinations for successful in vitro culture, three different media were used: Quoirin and Lepoivre (QL), woody plant medium (WPM), and Murashige and Skoog (MS) containing four different concentrations of 6‑benzylaminopurine (BAP) combined with 0.2 mg/l or 0.5 mg/l of gibberellic acid (GA). Different concentrations of indole-3-butyric acid (IBA) and naphthalene acetic acid (NAA) added to half-strength QL medium were used for optimizing the rooting medium. The combination of QL medium with 1.5 mg/l BAP and 0.01 mg/l IBA resulted in 100% shoot regeneration. The number of shoots (17.20 ± 0.64) and shoot length (2.80 ± 0.10 cm) were greatest when QL medium with 0.75 mg/l BAP and 0.2 mg/l GA was used. One hundred percent root development with the greatest number of roots per explant (8.13 ± 0.44) and longest root length (3.77 ± 0.23 cm) were achieved when half-strength QL medium with 0.5 mg/l of IBA was used. Simple sequence repeat analysis confirmed the reliability of this protocol for efficient large-scale micropropagation of M. sieversii. Through this study, an efficient micropropagation protocol that can be used for large-scale cultivation as well as germplasm conservation of M. sieversii was developed.

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Funding

This work was supported by the Ministry of Education and Science, Republic of Kazakhstan, IRN number AP09563185 for 2021, for the project “Development of cryobiotechnology of endangered plant species of Malus sieversii and Malus niedzwetzkyana for conservation and reproduction.”

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Dyussembekova Damira, Nurtaza Aidana, Yessimseitova Assel, Shevtsov Alexandr, Lutsay Viktoriya, Yerlan Ramankulov, and Kakimzhanova Almagul. The first draft of the manuscript was written by Kakimzhanova Almagul and Dyussembekova Damira, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript. Conceptualization: Kakimzhanova Almagul; methodology: Dyussembekova Damira, Nurtaza Aidana, Yessimseitova Assel, Shevtsov Alexandr, Lutsay Viktoriya, Yerlan Ramankulov, and Kakimzhanova Almagul; formal analysis and investigation: Kakimzhanova Almagul, Dyussembekova Damira; writing—original draft preparation: Kakimzhanova Almagul; writing—review and editing: Kakimzhanova Almagul; funding acquisition: Kabieva Saltanat, Kakimzhanova Almagul; resources: Saltanat Kabieva, Kakimzhanova Almagul, Shevtsov Alexandr; supervision: Kakimzhanova Almagul, project manager: Kabieva Saltanat.

Corresponding author

Correspondence to Almagul Kakimzhanova.

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Conflict of interest

D. A. Kakimzhanova, D. Dyussembekova, A. Nurtaza, A. Yessimseitova, A. Shevtsov, V. Lutsay, Y. Ramankulov, and S. Kabieva declare that they have no competing interests.

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Data availability

The datasets generated during the current study are available from the corresponding author on reasonable request.

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Kakimzhanova, A., Dyussembekova, D., Nurtaza, A. et al. An Efficient Micropropagation System for the Vulnerable Wild Apple Species, Malus sieversii, and Confirmation of Its Genetic Homogeneity. Erwerbs-Obstbau 65, 621–632 (2023). https://doi.org/10.1007/s10341-022-00720-8

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  • DOI: https://doi.org/10.1007/s10341-022-00720-8

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