High Genetic Differentiation in Endangered Sedum ussuriense and Implications for Its Conservation in Korea

Ku, Youn-Bong; Oh, Hyun Kyung; Chun, Young Jin; Cho, Kang-Hyun

doi:10.1007/s12374-011-9163-x

Cited by 5 publications

(11 citation statements)

References 29 publications

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“…Mey., which co‐occur in JNP and its vicinity. Sedum ussuriense is an herb with stems 10–25 cm in height that carry many small magenta pink flowers (5–6 mm in diameter) that are visited by insects (Ku et al, 2011). Members of Sedum are known to be pollinated by a variety of insects, such as bees, flies, and butterflies, and both out crossing and mixed mating have been reported (Wyatt, 1983; Priya, 2007).…”

mentioning

confidence: 99%

Comparative genetic structure betweenSedum ussurienseandS. kamtschaticum(Crassulaceae), two stonecrops co‐occurring on rocky cliffs

Chung

López‐Pujol

2014

American J of Botany

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• Premise of the study: Geographic isolation due to discontinuities of suitable habitat may have significant effects on the genetic structure of plant populations. Even within a few kilometers, physical barriers to gene flow may lead to considerable genetic differentiation among populations.• Methods: Sedum ussuriense is a boreal species that in Korea occurs only in four valleys separated by mountain ranges in Juwangsan National Park and its vicinity (a range of ∼15 km). Its congener S. kamtschaticum, by contrast, co-occurs in the four valleys but also on the intervening mountains. Using 12 allozyme loci, we comparatively assessed genetic variability and structure in 12 population pairs of the two stonecrops.• Key results: While we found high and comparable levels of within-population genetic variation for the two species, among-population divergence was significantly higher in S. ussuriense (F = 0.261 vs. F = 0.165). Sedum ussuriense also showed a much higher percentage of among-valley variation (19%) than S. kamtschaticum (4%).• Conclusions: High levels of genetic diversity in the two Sedum species are consistent with the previous hypothesis that mountains of the Korean Peninsula served as glacial refugia for many boreal species. Given that the two congeners have similar life-history traits, the lower among-population differentiation in S. kamtschaticum is attributable to its higher abundance and more continuous distribution in the study area. This study confirms the central role of geographic isolation in the genetic structure of plant species even at very small scales.

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confidence: 99%

Comparative genetic structure betweenSedum ussurienseandS. kamtschaticum(Crassulaceae), two stonecrops co‐occurring on rocky cliffs

Chung

López‐Pujol

2014

American J of Botany

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“…The lack of apparent barriers for gene flow between Okgye and Haok valleys for the three species is an expected result as the populations are relatively continuously distributed along two converging streams (Fig. 1); indeed, and according to Ku et al (2011), populations of H. ussuriense would have once constituted a single, continuous population that was fragmented as a result of human activities (mainly road construction). The two northern valleys are separated by less than 4 km, a physical but not a genetic barrier for all the species with the relative exception of S. polytrichoides.…”

Section: Effect Of Physical Barriers On Genetic Differentiationmentioning

confidence: 95%

“…H. Ohba (≡ Sedum ussuriense Kom.) is found only in the four valleys but does not occur in the mountains in between (Ku et al, 2011). In contrast, Sedum kamtschaticum Fisch.…”

mentioning

confidence: 86%

“…The species is somewhat common along the four valleys, but several populations also occur on rocks in mountains and hillsides between valleys. The three species are insect-pollinated (Ku et al, 2011;Chung et al, 2014b;M. Y. Chung, pers.…”

Section: Population Genetic Structure Of Sedum Polytrichoides 363mentioning

confidence: 99%

“…ussuriense has 10−25 cm high stems, that carry many small magenta pink flowers (5−6 mm in diameter) that are visited by insects (Ku et al, 2011). The species is disjunctly distributed in two areas: in JNP and its vicinity (but only in the small crevices of steep cliffs along the four valleys) and along the Tumen River (i.e., in the boundary between China, North Korea, and Russia) and the basin of the Ussuri River in Russia, over 700 km north (Ku et al, 2011).…”

Section: Study Speciesmentioning

confidence: 99%

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Notes on genetic variation in Sedum sarmentosum (Crassulaceae): Implications for the origin of southern Korean populations

Chung¹,

López‐Pujol²,

Chung³

2016

Korean J. Pl. Taxon

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An area comprising Juwangsan National Park and its adjacent mountains (southeastern Korean Peninsula) is a good model system for testing the effects of physical barriers to gene flows in plant populations. We predicted that plant species consisting of isolated populations are genetically more differentiated than those that are rather continuously distributed. Most populations of Sedum polytrichoides occur in four isolated valleys, and we assessed the genetic variability and structures using twelve allozyme loci in ten populations. We also compared the present results to earlier findings pertaining to the two co-occurring herbs Hylotelephium ussuriense (≡ Sedum ussuriense) (growing only in the four isolated valleys) and S. kamtschaticum (rather continuously distributed). We found moderate levels of within-population genetic variation in S. polytrichoides (H e = 0.112). Estimates of among-population divergence in S. polytrichoides were also moderate (F S T = 0.250) and, as expected, very similar to that of H. ussuriense (0.261) but considerably higher than the variation in S. kamtschaticum (0.165). An analysis of molecular variance (AMOVA) revealed that S. polytrichoides and H. ussuriense had higher percentages of among-valley variation (19% each) than S. kamtschaticum (4%). Most of this variation, as also indicated by the STRUCTURE program, was due to differences in genetic profiles between the two central valleys. We concluded that the genetic differences observed between species (S. kamtschaticum vs. S. polytrichoides and H. ussuriense) are mainly due to differences in their distribution within the study area.

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Morphological to Molecular Markers: Plant Genetic Diversity Studies in Walnut (Juglans regia L.)—A Review

et al. 2023

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Persian walnut populations have tremendous morphological and allelic diversity in their germplasm due to heavy outcrossing and years of seed multiplication. These variations are assessed by morphological, cytological, biochemical and molecular markers. Various researchers have used different tree, foliage, flower, nut, and kernel traits to evaluate morphological/phenotypic diversity. In walnut, morphological indices are considered the first to describe and classify the germplasm, but the environment influences them. In comparison, DNA-based markers can detect genetic diversity at any stage of plant development and have been shown to be a potential tool for assessing variation at the DNA level and deciphering genetic relationships within and between species. Microsatellites are very powerful and informative among DNA-based markers in studying genetic relationships and genetic identity at different levels. They are neutral, highly frequent, uniformly distributed, hypervariable, codominant, highly reproducible, produce many alleles per locus, and require a small amount of DNA for analysis. Current breeding objectives can be achieved by selecting superior genotypes from the germplasm, supplemented by molecular characterization in the selection of parents for each breeding program. Therefore, the use of morphological and molecular markers is recommended for efficient exploration and utilization of germplasm resources and to improve diversity among genetic resources. The published literature on morphological and molecular markers, especially SSRs, is presented in this review to provide current insights into the level of genetic diversity in walnut.

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High Genetic Differentiation in Endangered Sedum ussuriense and Implications for Its Conservation in Korea

Cited by 5 publications

References 29 publications

Comparative genetic structure betweenSedum ussurienseandS. kamtschaticum(Crassulaceae), two stonecrops co‐occurring on rocky cliffs

Comparative genetic structure betweenSedum ussurienseandS. kamtschaticum(Crassulaceae), two stonecrops co‐occurring on rocky cliffs

Notes on genetic variation in Sedum sarmentosum (Crassulaceae): Implications for the origin of southern Korean populations

Morphological to Molecular Markers: Plant Genetic Diversity Studies in Walnut (Juglans regia L.)—A Review

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