Genetic diversity and forest reproductive material - from seed source selection to planting

Ivetić, Vladan; Devetaković, Jovana; Nonić, Marina; Stanković, D.; Šijačić-Nikolić, Mirjana

doi:10.3832/ifor1577-009

Cited by 82 publications

(46 citation statements)

References 87 publications

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“…Robust models and tools are essentials to drive forest practice, forest management and the use and transfer of forest reproductive materials (Williams & Dumroese 2013). Even when gene pools are artificially moved or transferred (e.g., assisted gene flow or migration) the use of well-adapted seed and forest reproductive material is a fundamental issue under the projected climate change (Ivetić et al 2016). In this context, the conservation of MaPs and endemic species should be seen as a priority (Fady et al 2016).…”

Section: Pdm In the Framework Of Marginal Forest Populations And Climmentioning

confidence: 99%

Some refinements on species distribution models using tree-level National Forest Inventories for supporting forest management and marginal forest population detection

Marchi¹,

Ducci²

2018

iForest

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Spatial modelling is a fundamental tool to support forest management strategies. National Forest Inventories (NFIs) provide extensive and detailed data for spatial analysis. In this study, the most recent Italian NFI (INFC2005) was used to evaluate possible refinements on species distribution model (SDM) techniques and to derive the future scenarios for two target species (Fagus sylvatica L. and Abies alba Mill.) sharing a similar ecological environment and geographic range. A weighted SDM and a provenance distribution model (PDM) were tested, based on tree-level selection of NFI plots using species basal area as a filter. Two climate projections were analysed for 2050s according to the IPCC 5 th Assessment Report (AR5). The results were evaluated as possible guidelines for management of the Italian region of the EUFGIS network, where many marginal forest populations (MaPs) are currently included as genetic conservation units (GCUs). The uncertainty of coordinates of inventory points did not affect the results of SDM. No statistical differences were found when comparing the niche realization for the two model species (ANOVA p>0.05) mainly due to spatial autocorrelation between the environmental predictors. Based on the classic SDM evaluation method (True Skill Statistic -TSS) little improvements in predictions were observed when weighting each presence/absence records, possibly due to the lack of adequate ancillary data but also to the evaluation method. A higher accuracy of predictions (TSS>0.85) was obtained when different "provenances" were modelled separately, due to the reduction in the "background noise". We showed that for classical SDM, the prevalence of certain ecological features of some locations may drive algorithms to produce coarse averaged predictions. Provenance distribution modelling may represent a valuable step forward in spatial analysis, particularly for the detection of marginal peripheral populations. The exact spatial co-ordinates of plots and additional information on site quality (e.g., stand age, site index, etc.) in NFI data could greatly help in better weighting presence/absence data and properly test the new evaluation methods. Citation: Marchi M, Ducci F (2018). Some refinements on species distribution models using tree-level National Forest Inventories for supporting forest management and marginal forest population detection. iForest

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Section: Pdm In the Framework Of Marginal Forest Populations And Climmentioning

confidence: 99%

Some refinements on species distribution models using tree-level National Forest Inventories for supporting forest management and marginal forest population detection

Marchi¹,

Ducci²

2018

iForest

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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). 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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“…The level of genetic diversity in forest reproductive material depends in part on the level of genetic gain in the propagation material (Ivetić et al 2016). Genetic gain is increased by selection, which logically reduces the genetic diversity (Ruotsalainen 2014).…”

Section: Genetic Attributesmentioning

confidence: 99%

Seed quality attributes in seedling production of Norway spruce (<i>Picea abies</i> (L.) Karst.)

Himanen¹

2018

Diss. For.

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The artificial regeneration of Norway spruce (Picea abies (L.) Karst.) in the Nordic countries relies on planting containerized seedlings originating from seeds collected from either seed orchards or forest stands. The aim of this thesis is to investigate the effect of seed quality attributes on seedling production and to study whether it is possible to enhance germinability and seedling health through seed soaking treatments. The variation in seed quality among individual trees and clones and the components of seed weight variance are also studied. Commercial seed lots were screened for microbes and the effect of soaking treatment on microbial abundance was analyzed. The three seed lots contained some pathogenic fungi, but most fungi found were saprophytic. The seed lots differed in their likelihood to suffer from damping-off when germinated in water agar medium but not in peat. With current production methods seed-borne fungi do not have a great impact for seedling health, but altering for example the growing media may increase their importance. Seedling quality declined with increasing emergence time in an experiment on 1-yearold seedlings in the nursery, thus emphasizing the importance of fast germination. Seed soak-sorting hastened the emergence and increased seedling size more in 1.5-year-old containerized seedlings compared to the 1-year-old seedling crop in addition of decreasing the proportion of cull seedlings. The proportion of full seeds varied between individual trees and clones in cones collected from a forest stand and from a seed orchard. The average seed weights differed between trees or clones, but intracone variation was the greatest source of seed weight variance. This indicates that weight-based seed sorting may have a smaller impact on the genetic diversity of seed lots than previously thought. Seed and seedling producers as well as society have different preferences for seed quality attributes and different tools for quality management.

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Genetic diversity and forest reproductive material - from seed source selection to planting

Cited by 82 publications

References 87 publications

Some refinements on species distribution models using tree-level National Forest Inventories for supporting forest management and marginal forest population detection

Some refinements on species distribution models using tree-level National Forest Inventories for supporting forest management and marginal forest population detection

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

Seed quality attributes in seedling production of Norway spruce (<i>Picea abies</i> (L.) Karst.)

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