Genetic variation within and between populations of a desert poplar (Populus euphratica) revealed by SSR markers

Wang, Juan; Li, Zhijun; Guo, Qiuhong; Ren, Guangpeng; Wu, Yuxia

doi:10.1007/s13595-011-0119-6

Cited by 37 publications

(37 citation statements)

References 25 publications

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“…In general, signs of population isolation and low gene flow were detected throughout the Central System (F ST = 0.239) compared to that reported for some other wind-pollinated temperate forest species: F ST = 0.049 in Quercus garryana Douglas ex Hook [64], F ST = 0.052 in Populus euphratica Olivier [65], Φ ST = 0.013 in Fraxinus excelsior L. [66], and F ST = 0.074 in Castanea sativa Mill. [67].…”

Section: Genetic Diversity and Population Relationshipmentioning

confidence: 56%

Genetic Diversity in Relict and Fragmented Populations of Ulmus glabra Hudson in the Central System of the Iberian Peninsula

Puerto

García

Mohanty

et al. 2017

Forests

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Ulmus glabra Hudson, or Wych elm, occurs as fragmented and relict natural populations in the Central System, which acts as a refugium in the Iberian Peninsula. Considering the importance of the Central System populations of U. glabra, the main objective was to assess their genetic diversity using nuclear microsatellite markers. A total of 360 different genotypes were detected in the 427 U. glabra individuals analyzed. Wych elm populations showed a highly significant genetic differentiation (24%; p = 0.0001). Of the 22 populations studied, population of Rozas de Puerto Real (ROZ) showed the highest values of effective number of alleles (2.803), mean Shannon's diversity (1.047) and expected heterozygosity (0.590). Populations of ROZ and Mombeltrán (MOM) showed the highest values of observed heterozygosity (0.838 and 0.709, respectively), and highly negative values for inbreeding coefficient (−0.412 and −0.575, respectively). Also, most of putative hybrids (50 of 55) were observed in these two populations. Demographic analysis revealed signals for recent (four populations) and ancestral (fifteen populations) bottlenecks. Fragmented populations with diminishing number of individuals, along with anthropogenic intervention and Dutch elm disease (DED), are the main threats to U. glabra populations. From a future perspective, the information generated can be considered in the formulation of conservation strategies for U. glabra populations in the Central System.

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Section: Genetic Diversity and Population Relationshipmentioning

confidence: 56%

Genetic Diversity in Relict and Fragmented Populations of Ulmus glabra Hudson in the Central System of the Iberian Peninsula

Puerto

García

Mohanty

et al. 2017

Forests

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“…12 Allelic diversity estimated for these polymorphic markers was an average of 3.6 alleles per locus, (range 2–7 alleles), and the value is lower than the N A (4.3) in a population of 460 P. tomentosa and some other related species, such as Populus nigra , P. trichocarpa , Populus tremuloides , and Populus euphratica . 6,35,36 The level of allelic diversity reported in this study may be due to the limited sample size and/or the relatively conserved character of genic SSR markers. For generation of genetic maps, genic SSRs can determine the relative positions of transferable markers and directly compare candidate gene-containing SSRs and quantitative trait locus (QTL) locations across a broad variety of genetic backgrounds.…”

Section: Discussionmentioning

confidence: 89%

Development and Application of Microsatellites in Candidate Genes Related to Wood Properties in the Chinese White Poplar (Populus tomentosa Carr.)

Gong

Pan

et al. 2012

DNA Research

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Gene-derived simple sequence repeats (genic SSRs), also known as functional markers, are often preferred over random genomic markers because they represent variation in gene coding and/or regulatory regions. We characterized 544 genic SSR loci derived from 138 candidate genes involved in wood formation, distributed throughout the genome of Populus tomentosa, a key ecological and cultivated wood production species. Of these SSRs, three-quarters were located in the promoter or intron regions, and dinucleotide (59.7%) and trinucleotide repeat motifs (26.5%) predominated. By screening 15 wild P. tomentosa ecotypes, we identified 188 polymorphic genic SSRs with 861 alleles, 2–7 alleles for each marker. Transferability analysis of 30 random genic SSRs, testing whether these SSRs work in 26 genotypes of five genus Populus sections (outgroup, Salix matsudana), showed that 72% of the SSRs could be amplified in Turanga and 100% could be amplified in Leuce. Based on genotyping of these 26 genotypes, a neighbour-joining analysis showed the expected six phylogenetic groupings. In silico analysis of SSR variation in 220 sequences that are homologous between P. tomentosa and Populus trichocarpa suggested that genic SSR variations between relatives were predominantly affected by repeat motif variations or flanking sequence mutations. Inheritance tests and single-marker associations demonstrated the power of genic SSRs in family-based linkage mapping and candidate gene-based association studies, as well as marker-assisted selection and comparative genomic studies of P. tomentosa and related species.

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“…A decrease in genetic variation has been correlated with the reduced adaptive flexibility, which threatens the ability of a species to survive via natural regeneration and has deleterious effects on the species fitness (Wang et al, 2011). Existence of large variations within a population increases chances that at least some individuals will be capable to adapt to new environmental conditions, allowing natural selection to result in adaptation (Ivetić et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Existence of large variations within a population increases chances that at least some individuals will be capable to adapt to new environmental conditions, allowing natural selection to result in adaptation (Ivetić et al, 2016). Therefore, the information on the genetic diversity or genetic structure in the remaining populations of endangered species is a prerequisite for the successful management and development of effective conservation strategies (Pospíšková & Šálková, 2006;Wang et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Viability and genetic diversity of Populus nigra population from riparian forest in SNR Gornje Podunavlje

Čortan¹,

Tubić²

2017

Dendrobiology

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Populus nigra L. is one of the rarest and most endangered tree species in Western and Central Europe. Its genetic diversity is of great importance in enabling a native riparian population to survive and reproduce under changing environmental conditions. The aim of this research was assessment of P. nigra viability in one of the best preserved riparian ecosystems in Europe, Special Nature Reserve "Gornje Podunavlje" (Upper Danube), Serbia. Additionally, the analysis of the genetic diversity was made to support the effective conservation in the future. During our study, we have mapped 931 P. nigra trees, which were used for the assessment of present native population. Furthermore, we used 14 microsatellite markers to assess the genetic structure of this this population. Viability assessment showed considerable occurrence of P. nigra in the research area, even though the results show fragmentation. P. nigra occurs mostly individually or in small groups of trees, and has a non-sustainable age structure due to insufficient or lacking regeneration. Despite the limited size of the studied population, the apparent overall genetic diversity was high (He = 0.759) and comparable to other known native populations of P. nigra along the Danube basin. However, the results also confirmed existence of recent bottleneck effect. Significantly positive and quite high F is value (0.147) was noted, which may be ascribed to the "Wahlund effect" because of the population substructure that was revealed by the STRUC-TURE analysis (K=2). Although results say that coverage of native stands is not so promising, most of selected trees within our research assessed showed good viability with potential for natural reproduction However, the problem is that suitable areas for natural seedling establishment are scarce and with that gene flow is probably limited. The fragmentation of the area must be reduced and isolated stands must be interlinked as there is need to create larger non-fragmented areas.

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Genetic variation within and between populations of a desert poplar (Populus euphratica) revealed by SSR markers

Abstract: International audienc

Cited by 37 publications

References 25 publications

Genetic Diversity in Relict and Fragmented Populations of Ulmus glabra Hudson in the Central System of the Iberian Peninsula

Genetic Diversity in Relict and Fragmented Populations of Ulmus glabra Hudson in the Central System of the Iberian Peninsula

Development and Application of Microsatellites in Candidate Genes Related to Wood Properties in the Chinese White Poplar (Populus tomentosa Carr.)

Viability and genetic diversity of Populus nigra population from riparian forest in SNR Gornje Podunavlje

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