Genetic and clonal diversity in Korean populations ofVitex rotundifolia (Verbenaceae)

Yeeh, Yeehn; Kang, Suk-Yun; Chung, Hye Gi; Chung, M. S.; Chung, Myong Gi

doi:10.1007/bf02344541

Cited by 16 publications

(7 citation statements)

References 26 publications

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“…The level of genetic diversity of V. rotundifolia is much lower than that of other related species ( V. negundo ) in the same genus, which showed a relatively high P ‐valve (85%) as reported by Su et al (2003). However, compared with the result of a previous study by Yeeh et al (1996) using allozyme markers, low genetic variation ( P = 16.7%) and clonal diversity ( D = 0.74) were detected, and the genetic diversity of the Chinese V. rotundifolia populations is significantly higher than that of the sand‐dune V. rotundifolia populations from Korea. This discrepancy in genetic diversity between the Chinese and Korean populations is most likely due to the differences in area size for sample collection, in addition to the resolution power of the different genetic markers.…”

Section: Discussioncontrasting

confidence: 57%

“…Vitex rotundifolia 's fruits (Fructus Viticis) is an important medicinal plant commonly used in TCM (Kimura et al 1996). In addition, the shrubby plants of V. rotundifolia usually construct very thick patches by its long runners, making this species valuable for stabilizing sand dunes in coastal areas (Yeeh et al 1996). Regardless of its importance, knowledge on genetic diversity and population structure of this species is still very limited.…”

Section: Discussionmentioning

confidence: 99%

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Population Genetic Structure of the Medicinal Plant Vitex rotundifolia in China: Implications for its Use and Conservation

Zhu

Zhang

et al. 2008

JIPB

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Vitex rotundifolia L. is an important plant species used in traditional Chinese medicine. For its efficient use and conservation, genetic diversity and clonal variation of V. rotundifolia populations in China were investigated using inter-simple sequence repeat markers. Fourteen natural populations were included to estimate genetic diversity, and a large population with 135 individuals was used to analyze clonal variation and fine-scale spatial genetic structure. The overall genetic diversity (GD) of V. rotundifolia populations in China was moderate (GD = 0.190), with about 40% within-population variation. Across all populations surveyed, the average within-population diversity was moderate (P = 22.6%; GD = 0.086). A relatively high genetic differentiation (G(st) = 0.587) among populations was detected based on the analysis of molecular variance data. Such characteristics of V. rotundifolia are likely attributed to its sexual/asexual reproduction and limited gene flow. The genotypic diversity (D = 0.992) was greater than the average values of a clonal plant, indicating its significant reproduction through seedlings. Spatial autocorrelation analysis showed a clear within-population structure with gene clusters of approximately 20 m. Genetic diversity patterns of V. rotundifolia in China provide a useful guide for its efficient use and conservation by selecting particular populations displaying greater variation that may contain required medicinal compounds, and by sampling individuals in a population at >20 m spatial intervals to avoid collecting individuals with identical or similar genotypes.

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Section: Discussioncontrasting

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Population Genetic Structure of the Medicinal Plant Vitex rotundifolia in China: Implications for its Use and Conservation

Zhu

Zhang

et al. 2008

JIPB

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“…number of clones and clonal diversity within populations) have been calculated without information on population sizes, sampling areas or spatial distributions (e.g. Sherman‐Broyles et al ., 1992 for three North American sumacs; Yeeh et al ., 1996 for Vitex rotundifolia L.f.). Yet all of these factors are important in the dynamics of genetic variation in such species.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of allozyme polymorphisms following clonal and sexual reproduction in populations of Rhus javanica (Anacardiaceae)

Chung

Epperson

2000

Heredity

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Rhus javanica L. (Anacardiaceae), a dioecious tree with both sexual reproduction and clonal growth, is widely distributed in warm temperate, subtropical, and tropical regions in east Asia. We used allozyme loci and spatial autocorrelation statistics to examine clonal structure and the spatial distribution of allozyme polymorphisms in two Korean populations. Populations of the species maintain moderate levels of allozyme variability (mean He=0.175, GST=0.060), and high levels of multilocus genotypic diversity (mean DG=0.971). Clone-pair distances ranged from 1.4 m to 57.4 m, and had high mean values of 24.0 m and 25.6 m in the two study populations. Approximate genetic patch widths were inferred to be 23-25 m. The results indicated that within populations there is moderate (one study population) or no (other study population) spatial genetic structure among sexually reproduced individuals, and vegetatively reproduced genotypes also are almost randomly distributed. The spatial genetic structure among sexually reproduced trees in the one case is probably caused by limited pollen dispersal in that population, and the lack of structure in the other probably results from the short time elapsed since founding. It appears that clonal reproduction also does not contribute substantially to genetic isolation by distance neither among the sexually reproduced individuals nor the total population. Ramets often establish long distances from their progenitors and thus do not substantially increase the degree of local consanguineous matings.

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“…In addition, parameters for estimating clonal diversity (e.g., number of clones and clonal diversity in populations) have been calculated without information on population size or area (e.g., Pleasants and Wendel 1989;Bayer 1990;Aspinwall and Christian 1992;Sherman-Broyles et al 1992;Chung 1994;Kim and Chung 1995a,b;Yeeh et al 1996). An explicit characterization of the spatial arrangement of clones provides additional biological and ecological meaning to comparisons among populations of a species and a better understanding of the history of clonal versus sexual reproduction establishment in populations.…”

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SPATIAL GENETIC STRUCTURE OF CLONAL AND SEXUAL REPRODUCTION IN POPULATIONS OFADENOPHORA GRANDIFLORA(CAMPANULACEAE)

Chung

Epperson

1999

Evolution

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Abstract.-The spatial distribution of clonal versus sexual reproduction in plant populations should generally have differing effects on the levels of biparental inbreeding and the apparent selfing rate, produced via mating by proximity through limited pollen dispersal, We used allozyme loci, join-count statistics, and Moran's spatial autocorrelation statistics to separate the spatial genetic structure caused by clonal reproduction from that maintained in sexually reproduced individuals in two populations of Adenophora grandiflora, a perennial herb. Join-count statistics showed that there were statistically significant clustering of clonal genotypes within distances less than 4 m. Both the entire populations and the sets of sexually reproduced individuals exhibited significant spatial autocorrelation at less than about 12 m, and the sexually reproduced individuals are substantially structured in an isolation-by-distance manner, consistent with a neighborhood size of about 50.Key words.-Adenophora grandifiora, allozymes, endemic species, genetic structure, protandry, spatial autocorrelation.Received October 6, 1998.Spatial genetic structure within populations is primarily determined by the effects of limited dispersal of seed and pollen, isolation in small demographic patches, and microhabitat selection (Wright 1943a,b;Levin and Kerster 1974;Epperson 1993). Vegetative reproduction also has marked effects on the genetic structure of plant populations (e.g., Murawski and Hamrick 1990;Shapcott 1995). Spatial genetic structure can be analyzed using spatial autocorrelation analysis (Sokal and Oden 1978), which has advantages in that it includes all pairwise comparisons in samples and it makes no assumptions about the spatial scale of the structure within a plant population (Epperson 1989;Heywood 1991). More recently, Epperson and Li (1996) demonstrated the power of spatial autocorrelation analysis. For conservation purposes, analysis of spatial genetic structure and diversity within plant populations in rare, endangered, endemic, or narrowly distributed plant species could be used to provide baseline information for sampling strategies (e.g., Waller et al. 1987;Epperson 1992;Kang and Chung 1997;Maki and Yahara 1997;Chung and Park 1998;Gemmill et al. 1998;Godt and Hamrick 1998;Soejima et al. 1998).There have been relatively few detailed allozyme studies on the clonal and genetic structure of herbaceous plant populations (e.g., Murawski and Hamrick 1990;Hossaert-McKey et al. 1996). In addition, parameters for estimating clonal diversity (e.g., number of clones and clonal diversity in populations) have been calculated without information on population size or area (e.g., Pleasants and Wendel 1989;Bayer 1990;Aspinwall and Christian 1992;Sherman-Broyles et al. 1992;Chung 1994; Kim and Chung 1995a,b;Yeeh et al. 1996). An explicit characterization of the spatial arrangement of clones provides additional biological and ecological meaning to comparisons among populations of a species and a better understanding of the history of...

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Genetic and clonal diversity in Korean populations ofVitex rotundifolia (Verbenaceae)

Cited by 16 publications

References 26 publications

Population Genetic Structure of the Medicinal Plant Vitex rotundifolia in China: Implications for its Use and Conservation

Population Genetic Structure of the Medicinal Plant Vitex rotundifolia in China: Implications for its Use and Conservation

Spatial distribution of allozyme polymorphisms following clonal and sexual reproduction in populations of Rhus javanica (Anacardiaceae)

SPATIAL GENETIC STRUCTURE OF CLONAL AND SEXUAL REPRODUCTION IN POPULATIONS OFADENOPHORA GRANDIFLORA(CAMPANULACEAE)

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