New potato cultivars characterized in regard to dormancy breaking of tubers
Sławomir Wróbel
s.wrobel@ihar.edu.plInstytut Hodowli i Aklimatyzacji Roślin — Państwowy Instytut Badawczy w Radzikowie, Zakład Nasiennictwa i Ochrony Ziemniaka w Boninie (Poland)
Barbara Robak
Instytut Hodowli i Aklimatyzacji Roślin — Państwowy Instytut Badawczy w Radzikowie, Zakład Nasiennictwa i Ochrony Ziemniaka w Boninie (Poland)
Abstract
Presented studies evaluated the effectiveness of breaking the tuber dormancy immediately after harvest for new potato varieties, as a part of procedure of the grow-out test. Knowledge of this varietal characteristics significantly improves the performance of the grow-out test executed right after harvest. Examined varieties (23) were following: Bogatka, Boryna, Danuta, Etiuda, Eurostar, Gwiazda, Hermes, Honorata, Hubal, Ignacy, Igor, Innovator, Jubilat, Jurata, Jurek, Kaszub, Lavinia, Malaga, Mondeo, Oberon, Riviera, Sylvana, VR 808. Tuber samples were collected from the plots according to the official schedule of tuber sampling for virus indexation. To break the dormancy, eye-plugs were soaked for 15 min in aqueous solution of gibberellic acid, thiourea, Biseptol 480 (Sulfamethoxazolum, Trimethoprimum) and daminozide (B-Nine 85 SP). For most of the studied cultivars it was relatively easy to break the dormancy. In the case of cultivars Boryna, Hermes and Sylvana, breaking was slightly more difficult, therefore, it is preferable to shift the treatment to at least 2–3 weeks after harvesting. Cultivars Hubal and Etiuda required at least 5 weeks of resting for efficient dormancy breaking. For these cultivars sprouting occurred only for 36–64% eye-plugs if dormancy was broken too early. There was no correlation between the length of the resting period of each variety and difficulty of the dormancy breaking. However, when analyzed by different groups of maturity significant negative correlation was observed (r = -0.66) in the medium early cultivars indicating that a longer resting period in these varieties is relatively easier to break.
Keywords:
dormancy, gibberellic acid, new cultivars, potato, thioureaReferences
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Authors
Sławomir Wróbels.wrobel@ihar.edu.pl
Instytut Hodowli i Aklimatyzacji Roślin — Państwowy Instytut Badawczy w Radzikowie, Zakład Nasiennictwa i Ochrony Ziemniaka w Boninie Poland
Authors
Barbara RobakInstytut Hodowli i Aklimatyzacji Roślin — Państwowy Instytut Badawczy w Radzikowie, Zakład Nasiennictwa i Ochrony Ziemniaka w Boninie Poland
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