Seed dormancy of hybrids and parent lines of sunflower (Helianthus annuus L.)
| Autor: | Milka Vujakovic, Velimir Radić, D. Škorić, Vladimir Miklič, Jelena Mrđa, Svetlana Balešević-Tubić, Dušica Jovičić |
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| Rok vydání: | 2012 |
| Předmět: |
0106 biological sciences
sunflower Seed dormancy seed dormancy food and beverages seed germination 04 agricultural and veterinary sciences Biology 01 natural sciences Sunflower chemistry.chemical_compound Temperature treatment Agronomy chemistry Germination Helianthus annuus 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Agronomy and Crop Science Gibberellic acid Seed testing 010606 plant biology & botany Hybrid |
| Zdroj: | Helia |
| Popis: | SUMMARY Sunflower is a plant species with a prominent period of seed dormancy. Physiological maturation period can be accelerated under laboratory conditions using methods for breaking seed dormancy such as: previous cooling at 5-10°C, previous heating at 30-35°C, gibberellic acid treatment, KNO3, ethrel, etc. The aim of this study was to determine the duration of seed dormancy period of different sunflower hybrids and parent lines produced in Serbia, and to determine which of the methods for breaking seed dormancy gives the best results. Studies were carried out on five commercial sunflower hybrids and their parental components. Seed germination was determined after harvesting using standard laboratory methods and tetrazolium tests. The following methods were used for seed dormancy breaking: low temperature treatment of 510°C, high temperature treatment of 30-35°C, and treatment with gibberellic acid. The tests were performed in the period of 30, 50, and 90 days after harvesting. The application of gibberellic acid method gave the lowest values of seed germination, while statistical significant differences between the control and method of low and high temperatures were not found. Sunflower hybrids Sremac, Dusko, NS-H-111, Velja and Branko, as well as the female lines of hybrid NS-H-111, and male lines of hybrids Sremac and Velja had no prominent seed dormancy 30 days after harvesting. Seed dormancy in female lines of hybrids Sremac, Dusko, Velja and Branko and male lines of hybrids Dusko, NS-H-111 and Branko was decreased 90 days after storage, but it was not completely removed. |
| Databáze: | OpenAIRE |
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