Impact of altitude and topography on the genetic diversity of Quercus serrata populations in the Chichibu Mountains, central Japan

Ohsawa, Takafumi; Saito, Yoko; Sawada, Haruo; Ide, Yuji

doi:10.1016/j.flora.2007.02.007

Cited by 43 publications

(24 citation statements)

References 35 publications

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“…Moreover, when we tested the relationship between the genetic diversity of P. balfouriana populations and altitude, we found that there was no clear relationship. This result is consistent with studies on other tree species in mountainous regions (Ohsawa, 2008). The result may relate to the complex interaction of ecological and geographical factors in the southeast of the Qinghai-Tibet Plateau.…”

Section: Discussionsupporting

confidence: 92%

Genetic variation of isolated Picea balfouriana populations from the southeast of the Qinghai-Tibet Plateau

Lu¹,

Wang²,

Zhang³

et al. 2009

Ann. For. Sci.

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Abstract• The objective of this work is to estimate the level of genetic variation and pattern of genetic structure of isolated Picea balfouriana populations.• Nine SSR markers and six STS markers were assayed in ten natural populations of P. balfouriana, which is a regionally distributed conifer species in the southeast of the Qinghai-Tibet Plateau.• Expected heterozygosity ranged from 0.592 to 0.710 based on SSRs, and from 0.489 to 0.635 based on STS markers. The SSR and STS markers revealed that 11% and 12% of variation, respectively, was present among populations. However, the SSRs showed no deviation from the Hardy-Weinberg equilibrium (F IS = −0.030), unlike the STS markers (F IS = 0.249). In addition, assignment methods showed that individuals from the same sampling site usually cluster together.• Our results indicated that the distribution of genetic variation and population genetic structure of P. balfouriana may be attributed to habitat fragmentation and heterogeneous environments caused by the complex topographic environment in the Qinghai-Tibet Plateau. The population genetic information obtained in our study will benefit the development and utilization of appropriate conservation and breeding strategies for P. balfouriana. Mots-clés :conifère / SSR / STS / différentiation génétique / méthodes bayésiennes d'assignation Résumé -Variation génétique des populations isolées de Picea balfouriana du sud-est du plateau Qinghai-Tibet.• L'objectif de ce travail a été d'estimer le niveau de variation génétique et le modèle de la structure génétique de populations isolées de Picea balfouriana.• Neuf marqueurs SSR et six marqueurs STS ont été testés sur dix populations naturelles de P. balfouriana qui est un conifère distribué au niveau régional dans le sud-est du plateau Qinghai-Tibet.• L'hétérozygotie attendue allait de 0,592 à 0,710 sur la base des marqueurs SSR, et de 0,489 à 0,635 sur la base des marqueurs STS. Les marqueurs SSR et STS ont révélé que 11 % et 12 % de la variation, respectivement, étaient présentes parmi les populations. Toutefois, les marqueurs SSR ne montraient aucun écart par rapport à l'équilibre de Hardy-Weinberg (F I = −0,030) à la différence des marqueurs STS (F I = 0,249).Les méthodes d'assignation bayésiennes ont montré que les individus d'un même site d'échantillonnage étaient habituellement groupés ensemble.• Nos résultats pourraient indiquer que la distribution de la variation génétique et la structure géné-tique de la population de Pinus balfouriana peuvent être attribuées à la fragmentation de l'habitat et à des environnements hétérogènes causés par un environnement topographique complexe dans le sud-est du plateau Qinghai-Tibet. L'information génétique obtenue sur la population dans notre étude sera bénéfique pour le développement et l'utilisation appropriés des stratégies de conservation et de sélection de Pinus balfouriana.

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Section: Discussionsupporting

confidence: 92%

Genetic variation of isolated Picea balfouriana populations from the southeast of the Qinghai-Tibet Plateau

Lu¹,

Wang²,

Zhang³

et al. 2009

Ann. For. Sci.

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“…may be due to better ecological conditions. In contrast, the lack of soil moisture at higher altitudes (Fatahi 2000;Ohsawa et al 2008) together with soil erosion may inhibit the development and regeneration of Quercus species.…”

Section: Discussionmentioning

confidence: 99%

“…forests play an important role from economic and ecological points of view. Various benefits can be mentioned for oak including wood for fuel, charcoal for smelting ores, pulpwood for paper, and lumber and laminates for furniture, panelling and flooring and food for many birds and mammals (Johnson et al 2001;Ohsawa et al 2008). Most Zagros forests are now semidegraded and coppiced because of intensive utilization and overgrazing by cattle and fire severities Supported by the University of Guilan, Project No.…”

mentioning

confidence: 99%

Quantitative and qualitative characteristics of Persian oak along altitudinal gradation and gradient (Case study: Ilam province, Iran)

Navroodi¹,

Zarkami²,

Basati³

et al. 2015

J. For. Sci.

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ABSTRACT:Quantitative and qualitative characteristics of Persian oak (Quercus persica) were studied in relation to altitude and slope variations in Ilam province. A total area of 1,500 m 2 (30 × 50 m) was covered in five altitudinal classes ranging from 800 to 1,800 m a.s.l. Samples were taken based on a systematic random sampling method with 24 sample plots at each class. In total, 120 sample plots (in five classes) were collected covering four gradient categories ranging from < 20 to > 60%. An analysis of variance (ANOVA) was carried out to compare differences between group means in gradient categories and Duncan's post-hoc test was performed to reveal differences between the means of various quantitative characteristics (e.g. growing stock, basal area, diameter at breast height, tree height and regeneration) and the altitudinal classes. The Kruskal-Wallis test was used to examine the differences between the means of qualitative variables and different altitudes and slopes categories. The results indicated that variations with altitudes may have a higher impact than slopes on the quantitative characteristics of the oak stands in the region while the qualitative variables of the native species were influenced by both altitudes and slope variations.

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“…Genetic diversity is affected by multiple factors, such as geographical distribution, mating system, life form, and pollen and seed dispersal (Ohsawa et al, 2008). Wild populations of S. hexandrum are very small and decline each year in China because of habitat fragmentation and human exploitation.…”

Section: Genetic Diversity Of S Hexandrummentioning

confidence: 99%

Genetic diversity and structure of the threatened species Sinopodophyllum hexandrum (Royle) Ying

et al. 2016

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ABSTRACT. Sinopodophyllum hexandrum is an important medicinal plant that has been listed as an endangered species, making the conservation of its genetic diversity a priority. Therefore, the genetic diversity and population structure of S. hexandrum was investigated through inter-simple sequence repeat analysis of eight natural populations. Eleven selected primers generated 141 discernible fragments. The percentage of polymorphic bands was 37.59% at the species level, and 7.66-24.32% at the population level. Genetic diversity of S. hexandrum was low within populations (average H E = 0.0366), but higher at the species level (H E = 0.0963). Clear structure and high genetic differentiation were detected between populations using unweighted pair groups mean arithmetic and principle coordinate analysis. Clustering approaches clustered the eight sampled populations into three major groups, and AMOVA confirmed there to be significant variation between populations (63.27%). Genetic differentiation may have arisen through limited gene flow (N m = 0.3317) in this species. Isolation by distance among populations was determined by comparing genetic distance versus geographical distance using the Mantel test. The results revealed no correlation between spatial pattern and geographic location. Given the low within-population genetic diversity, high differentiation among populations, and the increasing anthropogenic pressure on this species, in situ conservation measures, in addition to sampling and ex situ preservation, are recommended to preserve S. hexandrum populations and to retain their genetic diversity.

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Impact of altitude and topography on the genetic diversity of Quercus serrata populations in the Chichibu Mountains, central Japan

Cited by 43 publications

References 35 publications

Genetic variation of isolated Picea balfouriana populations from the southeast of the Qinghai-Tibet Plateau

Genetic variation of isolated Picea balfouriana populations from the southeast of the Qinghai-Tibet Plateau

Quantitative and qualitative characteristics of Persian oak along altitudinal gradation and gradient (Case study: Ilam province, Iran)

Genetic diversity and structure of the threatened species Sinopodophyllum hexandrum (Royle) Ying

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