Genetic Diversity of the Relict Plant Taiwania cryptomerioides Hayata (Cupressaceae) in Mainland China

Li, Zhong-Chao; Wang, Xiaolan; Ge, Xue‐Jun

doi:10.1515/sg-2008-0037

Cited by 11 publications

(10 citation statements)

References 27 publications

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“…The ISSR analysis conducted for the T. sutchuenensis populations located in North-East Chongqing, China, revealed the presence of an appreciable level of genetic diversity, which was more than that of its relatives Calocedrus macrolepis [20], Taiwania cryptomerioides [21], Cupressus gigantea [22] and C. chengiana [23]. This is an expected result for a woody, moderately long-lived, outcrossing and wind-pollinated species [24].…”

Section: Discussionmentioning

confidence: 99%

Genetic Diversity of the Critically Endangered Thuja sutchuenensis Revealed by ISSR Markers and the Implications for Conservation

Liu

Shi

Chang

et al. 2013

IJMS

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Thuja sutchuenensis Franch. is a critically endangered plant endemic to the North-East Chongqing, China. Genetic variation was studied to assess the distribution of genetic diversity within and among seven populations from the single remnant locations, using inter-simple sequence repeat (ISSR) markers. A total of 15 primers generated 310 well defined bands, with an average of 20.7 bands per primer. The seven populations revealed a relatively high level of genetic diversity in the species. The percentage of polymorphic bands, Nei’s gene diversity and Shannon’s information index at the population and species level were 76.1%, 0.155, 0.252 and 100%, 0.165, 0.295, respectively. A low level of genetic differentiation among populations (GST = 0.102), in line with the results of Analyses of Molecular Variance (AMOVA), and a high level of gene flow (Nm = 4.407) were observed. Both the Unweighted Pair Group Method with Arithmatic Mean (UPGMA) cluster analysis and Principal Coordinates Analysis (PCoA) supported the grouping of all seven populations into two groups. In addition, Mantel test revealed no significant correlation between genetic and geographical distances (r = 0.329, p = 0.100). The low genetic differentiation among populations implies that the conservation efforts should aim to preserve all the extant populations of this endangered species.

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Section: Discussionmentioning

confidence: 99%

Genetic Diversity of the Critically Endangered Thuja sutchuenensis Revealed by ISSR Markers and the Implications for Conservation

Liu

Shi

Chang

et al. 2013

IJMS

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“…Csencsics et al , 2009; Liepelt et al , 2009; Scalfi et al , 2009), also from other continents: Asia (e.g. Tsuda & Ide, 2005; Zhang et al , 2005; Semerikov, Iroshnikov & Lascoux, 2007; Li, Wang & Ge, 2008; Fofana et al , 2009; Hiraoka & Tomaru, 2009), Central and South America (e.g. Newton et al , 2008; del Castillo, Argueta & Saenz‐Romero , 2009; Pastorino et al , 2009), Africa (e.g.…”

Section: Landscape Genetics Of Trees: the Importance Of Mountainsmentioning

confidence: 99%

Plant health and global change – some implications for landscape management

et al. 2010

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Global change (climate change together with other worldwide anthropogenic processes such as increasing trade, air pollution and urbanization) will affect plant health at the genetic, individual, population and landscape level. Direct effects include ecosystem stress due to natural resources shortage or imbalance. Indirect effects include (i) an increased frequency of natural detrimental phenomena, (ii) an increased pressure due to already present pests and diseases, (iii) the introduction of new invasive species either as a result of an improved suitability of the climatic conditions or as a result of increased trade, and (iv) the human response to global change. In this review, we provide an overview of recent studies on terrestrial plant health in the presence of global change factors. We summarize the links between climate change and some key issues in plant health, including tree mortality, changes in wildfire regimes, biological invasions and the role of genetic diversity for ecosystem resilience. Prediction and management of global change effects are complicated by interactions between globalization, climate and invasive plants and/or pathogens. We summarize practical guidelines for landscape management and draw general conclusions from an expanding body of literature.

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“…In these areas, it occurs on steep slopes in moist, evergreen forests at elevations ranging from 1800 to 2500 m (Fig. 1a; Farjon & Thomas, 2007; Li et al. , 2008b).…”

Section: Introductionmentioning

confidence: 99%

“…The contrast in their ecological profiles compared with those of the main populations, as well as their proximity to human settlements, has led to some debate about whether they are the remnants of a more extensive and contiguous population, the result of recent natural recolonization/recruitment, or the result of human introduction (Yang et al. , 2006, 2009; Farjon & Thomas, 2007; Li et al. , 2008b).…”

Section: Introductionmentioning

confidence: 99%

Refugia and phylogeography of Taiwania in East Asia

Chou

Thomas

et al. 2011

Journal of Biogeography

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Aim The East Asia endemic Taiwania cryptomerioides Hayata is an iconic and relictual monotypic conifer whose main extant populations are now restricted to the Yunnan-Myanmar border, northern Vietnam and Taiwan. It has also been reported from several localities in Guizhou, Hubei and Fujian Provinces, China. Its fossil record indicates that, while it was more widely distributed in the Northern Hemisphere and grew under a range of different ecological conditions, it has remained almost unchanged in its morphology for over 100 Myr. We investigate whether these remaining extant, disjunct populations have diverged genetically; when such a divergence may have occurred; and which, if any, of the extant populations exhibit refugial characteristics.Location East Asia.Methods Sequences of five chloroplast DNA markers (petG-trnP, trnH-psbA, trnV-trnM, trnC-ycf6 and trnL-trnF) from all extant populations of T. cryptomerioides were analysed to reveal their phylogeography. Molecular clock models with fossil calibrations were used to estimate divergence times between extant populations.Results Extremely low nucleotide diversity was found in the overall population (p = 0.00077) with only nine haplotypes distinguished. The mainland Asia populations share one major ancestral haplotype. The insular populations in Taiwan all possess a unique haplotype with at least an eight-mutational-step difference to the mainland Asia haplotype. Molecular clock estimations demonstrated that the mean divergence time between the predominant insular population haplotype and the mainland Asia haplotype occurred at c. 3.23-3.41 Ma, followed by a split into Vietnamese and Yunnan-Myanmar populations (c. 1.0-1.39 Ma).Main conclusions Strong genetic differentiation exists between insular (Taiwan) and mainland Asia populations. The split between insular and mainland haplotypes can be dated back to the end of the Pliocene. The Yunnan-Myanmar border area, northern Vietnam and Taiwan are identified here as potential refugia for T. cryptomerioides. Other populations in mainland China are unlikely to be the result of historical fragmentation and their origins require further investigation.

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Genetic Diversity of the Relict Plant Taiwania cryptomerioides Hayata (Cupressaceae) in Mainland China

Abstract: Unauthenticated Download Date | 5/11/18 8:27 PM 243 genetic variation were related to biogeographic history and the small population size. On the basis of these findings, we discuss the development of conservation strategies for this endangered species.

Cited by 11 publications

References 27 publications

Genetic Diversity of the Critically Endangered Thuja sutchuenensis Revealed by ISSR Markers and the Implications for Conservation

Genetic Diversity of the Critically Endangered Thuja sutchuenensis Revealed by ISSR Markers and the Implications for Conservation

Plant health and global change – some implications for landscape management

Refugia and phylogeography of Taiwania in East Asia

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