Journal
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
Volume 92, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bse.2020.104118
Keywords
Common thyme; Genetic diversity; Inter simple sequence repeats; Thymol; Volatile oil
Funding
- Ministry for Innovation and Technology within the framework of the Higher Education Institutional Excellence Program [NKFIH-1159-6/2019]
- scope of plant breeding and plant protection researches of Szent Istvan University
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Common thyme (Thymus vulgaris L.) is a Mediterranean evergreen shrub of the Lamiaceae that shows chemical polymorphism in its natural populations. In Mediterranean habitats six basic chemotypes have been described according to the main component in its essential oil: thymol, carvacrol, linalool, geraniol, alpha-terpineol, thuyanol-4, of which the thymol chemotype is widely used in cultivation and as a spice. In this study ten selected clones were analysed in terms of chemical composition of the volatile oil and genetic fingerprint. The study question was whether individual chemotypes can be distinguished by molecular markers. Chemical composition was analysed by GC-MS, and for assessing the genetic polymorphism ISSR marker system was chosen as it is reliable and easy to use even in case of less studied species. The studied T. vulgaris clones represented five different chemotypes and could be distinguished using 12 ISSR primers. Clones belonging to the thymol chemotype showed the most distinct separation. The study shows the potential of using molecular markers in breeding and selection of T. vulgaris, being able to differentiate different chemotypes.
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