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Frost hardiness of flower buds of 16 apricot cultivars during dormancy

József L. Bakos

József L. Bakos

Department of Pomology, Institute of Horticultural Sciences, Hungarian University of Agriculture and Life SciencesBudapest, Hungary
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Bakos, József L.
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Márta Ladányi

Márta Ladányi

Department of Applied Statistics, Institute of Mathematics and Basic Science, Hungarian University of Agriculture and Life SciencesBudapest, Hungary
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Ladányi, Márta
 and 
László Szalay

László Szalay

Department of Pomology, Institute of Horticultural Sciences, Hungarian University of Agriculture and Life SciencesBudapest, Hungary
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Szalay, László
  
Apr 28, 2024
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Article Category: ORIGINAL ARTICLE
Published Online: Apr 28, 2024
Page range: 81 - 93
Received: Aug 30, 2023
Accepted: Jan 31, 2024
DOI: https://doi.org/10.2478/fhort-2024-0005
Keywords
© 2024 József L. Bakos et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1.

Apricot flower buds cut lengthwise for evaluation after freezing treatment: undamaged by frost (A, B) and damaged by frost (C, D).
Apricot flower buds cut lengthwise for evaluation after freezing treatment: undamaged by frost (A, B) and damaged by frost (C, D).

Figure 2.

Frost damage of flower buds for 16 apricot cultivars based on artificial freezing tests (October 2019).
Frost damage of flower buds for 16 apricot cultivars based on artificial freezing tests (October 2019).

Figure 3.

Frost hardiness profiles of 16 apricot cultivars for the dormancy period of 2019/2020.
Frost hardiness profiles of 16 apricot cultivars for the dormancy period of 2019/2020.

Figure 4.

Frost hardiness profiles of 16 apricot cultivars for the dormancy period of 2021/2022.
Frost hardiness profiles of 16 apricot cultivars for the dormancy period of 2021/2022.

Figure 5.

Frost hardiness profiles of 16 apricot cultivars for the dormancy period of 2022/2023.
Frost hardiness profiles of 16 apricot cultivars for the dormancy period of 2022/2023.

Figure 6.

Daily maximum and minimum temperatures during the three dormancy periods (A:2019/20; B:2021/22; C:2022/23) with the frost hardiness profile (LT50 values) of two cultivars: Sweet Red as one of the most frost sensitive and Harlayne as one of the most frost resistant cultivars.
Daily maximum and minimum temperatures during the three dormancy periods (A:2019/20; B:2021/22; C:2022/23) with the frost hardiness profile (LT50 values) of two cultivars: Sweet Red as one of the most frost sensitive and Harlayne as one of the most frost resistant cultivars.

Figure 7.

Results of cluster analysis for frost hardiness based on measured LT50 values for the dormancy periods of 2019/20 (A), 2021/22 (B), 2022/23 (C) and the three years together (D).
Results of cluster analysis for frost hardiness based on measured LT50 values for the dormancy periods of 2019/20 (A), 2021/22 (B), 2022/23 (C) and the three years together (D).

Classification of 16 apricot cultivars for their frost hardiness ability by hierarchical clustering with Wards method based on the measured LT50 values_

Cultivar 2019/2020 2021/2022 2022/2023 3 years Legend
Primaya G1 G1 G1 G1 G1—very frost sensitive
Tsunami G1 G1 G1 G1
Sweet Red G1 G1 G1 G1
Aurora G1 G2 G1 G2 G2—slightly frost sensitive
Pinkcot G1 G2 G1 G2
Petra G1 G2 G2 G2
Bhart G2 G2 G2 G3 G3—slightly frost resistant
Goldrich G2 G2 G2 G3
Bergarouge G3 G2 G2 G3
Magyar kajszi C.235 G2 G3 G3 G3
Hargrand G2 G3 G3 G3
Farbaly G2 G3 G3 G3
Harogem G3 G3 G3 G3
Kurezia G3 G4 G4 G4 G4—very frost resistant
Rózsakajszi C.1406 G4 G4 G4 G4
Harlayne G4 G4 G4 G4
Language:
English
Publication timeframe:
2 times per year
Journal Subjects:
Life Sciences, Plant Science, Zoology, Ecology, Life Sciences, other
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