| Title |
Genetic structure, adaptation and invasiveness of daisy fleabane (Erigeron annuus (L.) Pers.) populations / |
| Translation of Title |
Vienmetės šiušelės (Erigeron annuus (L.) Pers.) populiacijų genetinė struktūra, adaptyvumas ir invazyvumas. |
| Authors |
Tunaitienė, Virginija |
| Full Text |
|
| Pages |
48 |
| Keywords [eng] |
invasion ; rapd ; issr ; allelopathy |
| Abstract [eng] |
Biological invasion by alien species is recognized as a significant component of global environmental change in our planet. The rate of spread of invasive species is growing due to increasing migration and international trade. The number of invasive species in Europe is growing almost exponentially. Invasive plant species cause not only serious environmental, economic, but also human health impacts. One of invasive species, daisy fleabane (Erigeron annuus (L.) Pers.), is the subject of this dissertation. It originated from the eastern part of North America. It seems likely it was introduced to Lithuania from Western Europe at the end of the 19th century as an ornamental plant. The genetic and genotypic structure of Lithuanian invasive E. annuus populations was evaluated using two types of DNA markers (RAPD and ISSR). ISSR analysis showed the existence of E. annuus genetic diversity gradient in the part of invasive European range and revealed statistically significant genetic differentiation between E. annuus populations occurring in disturbed and stable habitats. Although E. annuus shows high phenotypic plasticity in its morphology and phenology, which helps to survive and spread in new habitats, genetically determined local adaptation occurs in some populations. |
| Dissertation Institution |
Vilniaus universitetas. |
| Type |
Summaries of doctoral thesis |
| Language |
Lithuanian |
| Publication date |
2016 |
