Genetic structure and gene flow in a metapopulation of an endangered plant species,<i>Silene tatarica</i>

Tero, N.; Aspi, Jouni; Siikamäki, Pirkko; Jäkäläniemi, Anne; Tuomi, Juha

doi:10.1046/j.1365-294x.2003.01898.x

Cited by 204 publications

(271 citation statements)

References 66 publications

(67 reference statements)

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“…Kudoh and Whigham (1997), for example, found high gene flow among populations that were adjacent to the tidal stream, indicating that these populations may function as a single genetic metapopulation by extensive and long-distance seed exchanges between them. Similarly, Tero et al (2003) also found no isolation by distance and no regional structure indicating frequent longdistance seed exchange. On the other hand, nearby populations formed clear clusters in the UPGMA dendrogram, which suggests that short-distance seed dispersal or pollen flow among nearby populations may affect the structure of genetic variation in the studied metapopulation.…”

Section: Discussionmentioning

confidence: 89%

“…In Populus nigra, a riparian pioneer tree species that was studied along the Drô me River, the F ST value was 0.047 (Imbert and Lefèvre, 2002). Only in the case of the riparian plant Silene tatarica, genetic differentiation appeared to be substantially higher (y B ¼ 0.287) (Tero et al, 2003). Recent populations located in the immediate vicinity of the river, where extinction-colonization events are recurrent features of the species ecology, had lower levels of genetic differentiation than populations located in the winter bed of the river.…”

Section: Discussionmentioning

confidence: 99%

“…Dynamic river systems are excellent model systems to study the effects of metapopulation turnover on genetic diversity and differentiation Whigham, 1997, 2001;Tero et al, 2003;DeWoody et al, 2004) and to evaluate the relative importance of short-and longdistance seed dispersal in determining long-term persistence of the metapopulation (Menges, 1990;Ouborg, 1993;Jäkäläniemi et al, 2005). Indeed, ephemeral habitat patches and recurrent local extinction and colonization are characteristic of these dynamic river systems (Lytle and Poff, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal structure of genetic variation of a spreading plant metapopulation on dynamic riverbanks along the Meuse River

Jacquemyn

Honnay

Looy³

et al. 2006

Heredity

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Long-distance seed dispersal is a crucial determinant of within-population genetic variability and among-population genetic differentiation in plant metapopulations undergoing recurrent local extinctions and (re-)colonization. We investigated the spatial and temporal structure of genetic variation in a metapopulation of Sisymbrium austriacum located along a dynamic river system using dominant AFLP markers. Data on riverbank dynamics and colonization history allowed separating populations based on their age (r5 vs 45 years old). Bayesian analysis of population genetic structure indicated that populations were significantly differentiated from each other, but Mantel tests revealed that there was no relationship between pairwise geographic and genetic distances, suggesting that long-distance seed dispersal partly determines spatial genetic structure. Recent populations were less differentiated from each other than old populations. Analysis of molecular variance (AMOVA) indicated that both spatial factors and population age significantly determined genetic diversity, the effects of age being more important than spatial location. Clustering analysis revealed five large clusters, which were related primarily to population age and to a minor extent to geographical location. Our results indicate that the recurrent formation and destruction of riverbank habitats following peak flow events have a large impact on genetic diversity of riparian plant species.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal structure of genetic variation of a spreading plant metapopulation on dynamic riverbanks along the Meuse River

Jacquemyn

Honnay

Looy³

et al. 2006

Heredity

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“…Several basic hypotheses of migration patterns with contrasting predictions can be derived for population structure among such linearly arranged plant subpopulations (see e.g. Tero et al 2003). First, despite the apparent spatial subpopulation structure the patches may form a single panmictic unit with free gene flow throughout the genetically uniform population.…”

Section: Introductionmentioning

confidence: 99%

Genetic structure and gene flow in an endangered perennial grass, Arctophila fulva var. pendulina

et al. 2005

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Arctophila fulva var. pendulina is a rare endemic perennial grass confined to seashore and riverbank meadows around the Bothnian Bay, the northernmost part of the Baltic Sea. The number of A. fulva populations has decreased during the last few decades in Finland and Sweden, and nowadays there are only eight populations left in the drainage area of the Bothnian Bay. We investigated the distribution of genetic variation within and between six subpopulations in the largest remaining population at Liminka Bay, Finland, using amplified fragment length polymorphism (AFLP) markers. Relatively high amounts of variation were found in the subpopulations, the mean Nei's expected heterozygosity being typical (0.267) for an outcrossing species. Despite the fact that no seedlings or viable seeds of A. fulva have been found in the previous field studies, the observed high genotypic diversity suggested that sexual reproduction has played an important role at some time during the history of the studied A. fulva population. Analysis of population structure revealed a low level of genotypic differentiation (U ST =0.046) between subpopulations, and also significant sub-structuring within subpopulations. Isolation-by-distance between subpopulations was present on scales larger than 1 km. The overall pattern of genetic variation within and between subpopulations suggest that the population has characters of both stepping-stone and metapopulation models. Because our results suggested that subpopulations are more or less ephemeral, the conservation and management effort in this species should be targeted to conservation of the required habitat of the species instead of extant subpopulations.

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“…1.0) was used to estimate parameters related to genetic structure (Theta B value) (Tero et al 2003).…”

Section: Molecular Analysesmentioning

confidence: 99%

Genetic and morphological diversity in Cousinia cylindracea (Asteraceae) populations: Identification of gene pools

2015

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Abstract. Minaeifar AA, Sheidai M, Attar F. 2015. Genetic and morphological diversity in Cousinia cylindracea (Asteraceae) populations: Identification of gene pools. . Cousinia is one of the largest genera in the Asteraceae family. It contains 600 to 700 species distributed in Southwest and Central Asia. In Iran with 270 species it is the largest genus after Astragalus,. Cousinia probably is unique in the degree of diversification of all its parts and high numbers of species in restricted area. In this investigation 90 plant specimens of 10 geographical populations of Cousinia cylindracea Boiss. were studied from morphological and genetic (ISSR) points of view. Both intra and inter-population morphological and genetic variability was observed in the studied populations. ANOVA and CVA tests revealed significant morphological difference among these populations. Similarly, AMOVA tests revealed significant molecular difference among geographical populations. Mantel test produced significant positive correlation between genetic distance and geographical distance of the studied populations. Networking, STRUCTURE analysis and population assignment test revealed low degree of gene flow among these populations. The results identified two different gene pools of C. Cylindracea in Iran, supporting Rechinger suggestion that C. cylindracea might have two varieties in Iran.

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Genetic structure and gene flow in a metapopulation of an endangered plant species,Silene tatarica

Cited by 204 publications

References 66 publications

Spatiotemporal structure of genetic variation of a spreading plant metapopulation on dynamic riverbanks along the Meuse River

Spatiotemporal structure of genetic variation of a spreading plant metapopulation on dynamic riverbanks along the Meuse River

Genetic structure and gene flow in an endangered perennial grass, Arctophila fulva var. pendulina

Genetic and morphological diversity in Cousinia cylindracea (Asteraceae) populations: Identification of gene pools

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