Genetic Variation in Native and Invasive Populations of<i>Erigeron annuus</i>as Assessed by RAPD Markers

Edwards, Peter J.; Frey, D.; Bailer, Harald; Baltisberger, Matthias

doi:10.1086/498729

Cited by 31 publications

(41 citation statements)

References 37 publications

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“…The absence of genetic polymorphism in half of populations and the small number of genotypes in the polymorphic populations indicates predominating apomyctic reproduction of E. annuus in Lithuania. Edwards et al [16] established that most of the populations of this species from northern America and western Europe were polymorphic and possessed rather high levels of intrapopulation genotypic diversity. In the other study, Trtikova et al [17] found that 83% of studied populations from Switzerland were polymorphic.…”

Section: Discussionmentioning

confidence: 99%

“…Samples of fourteen populations (PN1, 3, 5-12, 16, 17, 21, 27) were collected in this region. This group includes populations from the city of Vilnius (5 populations -PN3, 5,11,16,19) and its outskirts (5 populations -PN1, 6,8,10,12). These populations form the putative focus of the oldest invasion [23].…”

Section: Methodsmentioning

confidence: 99%

“…The lower genetic diversity of some invasive plant populations has been shown with molecular markers such as ITS [8], RAPD [9][10][11] and ISSR [11][12][13][14]. In contrast, rather high genetic diversity has been shown in populations of the apomictic invaders Taraxacum, as revealed with AFLP markers [15], and Erigeron annuus, as revealed using RAPD and AFLP [16,17] markers. Five different clones were revealed in Chinese populations of Eichhornia crassipes with RAPD, and each population consisted of at least three clones [18].…”

Section: Introductionmentioning

confidence: 99%

“…E. annuus is triploid apomictic plant, which produces embryos through meiotic diplospory [20]. Some populations of E. annuus, however, show rather high polymorphism and contain local genotypes, suggesting that sexual reproduction does occur occasionally [16,17]. Predominant apomictic reproduction may be favorable for spread of E. annuus, because it allows establishing populations from a single propagule and may also maintain genotypes with broad environmental tolerance.…”

Section: Introductionmentioning

confidence: 99%

“…It is supposed that E. annuus was introduced into Lithuania most likely from west Europe at the end of the 19 th century [22]. If true, this introduction occurred more than two hundred years later than the introduction of the plant to some regions of West Europe, where it was introduced from North America [16,17]. The species was primarily grown as an ornamental plant in old estates, farmsteads and especially in old rural cemeteries.…”

Section: Introductionmentioning

confidence: 99%

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Clonal structure and reduced diversity of the invasive alien plant Erigeron annuus in Lithuania

et al. 2013

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The alien species Erigeron annuus (L.) Pers. is in an intensive spreading phase in Lithuania. Random amplified polymorphic DNA (RAPDs) and inter-simple sequence repeats (ISSRs) assays were used to study the genetic structure of old and new invasive populations and to determine the most spread genotypes of this species in Lithuania. Pairwise genetic distances between populations established using RAPD and ISSR markers significantly correlated (r=0.91, P<0.05). Our study indicates that there are two genetically different types of E. annuus populations. The first type is represented by a widely spread main clone and related monomorphic populations. The second type is represented by polymorphic populations, some of them present at sites where E. annuus has not been previously observed. Main clone predominates in nine populations and is from the region where this species was first described in natural ecosystems of Lithuania. UPGMA cluster analysis revealed genetic relationships between the main clone and accessions from old cemeteries where E. annuus has been grown as an ornamental plant. We found high genetic differentiation among populations (G ST=0.58 for RAPDs, G ST=0.64 for ISSRs). Taken together, our results will contribute to the monitoring of E. annuus spread in Lithuania.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Clonal structure and reduced diversity of the invasive alien plant Erigeron annuus in Lithuania

et al. 2013

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Is Rapid Adaptive Evolution Important in Successful Invasions?

Dormontt

Lowe

Prentis

2010

Fifty Years of Invasion Ecology

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Effects of competition and mowing on growth and reproduction of the invasive plant Erigeron annuus at two contrasting altitudes

Trtikova

2009

Bot. Helv.

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Invasive plants are often abundant at frequently disturbed sites such as roadsides, because they benefit from reduced competition or increased nutrient availability. In Switzerland, roadsides are subjected to regular mowing, and to persist in these sites, plants must be able to compensate for the biomass removal. However, the ability to tolerate competition and mowing might decline under less favourable growth conditions, such as those at higher altitudes. I investigated how competition and mowing affect growth and reproduction of Erigeron annuus (L.) Pers., an invasive plant common on Swiss roadsides, and how these effects change with altitude. The experiment was replicated in common gardens at altitudes of 400 m and 1,000 m asl, representing growth conditions in the main distribution area of E. annuus and at its altitudinal limit, respectively. Vegetative growth was negatively affected by competition at both sites, but especially at 1,000 m. The number of capitula was not affected by competition at 400 m, but was reduced at 1,000 m. Plants regrew vigorously after mowing in both gardens. The effects of mowing on reproductive output were positive at 400 m, but negative at 1,000 m. These results imply that E. annuus is able to tolerate competition and mowing at low altitudes, but both of these factors hinder its reproduction at higher altitudes.

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Genetic Variation in Native and Invasive Populations ofErigeron annuusas Assessed by RAPD Markers

Cited by 31 publications

References 37 publications

Clonal structure and reduced diversity of the invasive alien plant Erigeron annuus in Lithuania

Clonal structure and reduced diversity of the invasive alien plant Erigeron annuus in Lithuania

Is Rapid Adaptive Evolution Important in Successful Invasions?

Effects of competition and mowing on growth and reproduction of the invasive plant Erigeron annuus at two contrasting altitudes

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