Factors determining fine-scale spatial genetic structure within coexisting populations of common beech (Fagus sylvatica L.), pedunculate oak (Quercus robur L.), and sessile oak (Q. petraea (Matt.) Liebl.)

IF 2.5 3区农林科学 Q1 FORESTRY Annals of Forest Science Pub Date : 2024-01-12 DOI:10.1186/s13595-023-01217-4

Elżbieta Sandurska, Bartosz Ulaszewski, Katarzyna Meyza, Ewa Sztupecka, Jarosław Burczyk

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Abstract

Key message

Naturally regenerating populations of common beech, pedunculate, and sessile oaks develop strong spatial genetic structures at adult and seedling stages. Significant genetic relationship occurs between individuals growing up to 60 m apart. This indicates the minimum distance separating trees from which seeds used for reforestation should be harvested to avoid the adverse effects of excessive relatedness among offspring.

Context

Spatial genetic structure is an inherent characteristic of naturally regenerating plant populations and has practical implications in forests for the management of genetic resources.

Aims

We investigated the extent of spatial genetic structure in three broad-leaved forest tree species (common beech—Fagus sylvatica L.; pedunculate oak—Quercus robur L.; and sessile oak—Q. petraea (Matt.) Liebl.) coexisting in the same nature reserve, explored its variation among species and different life stages (adults/offspring), and tested its possible determinants.

Methods

We explored patterns of spatial distribution of individuals, and using microsatellites, we estimated parameters of spatial genetic structure based on kinship relationships, considering possible sources of variation.

Results

In adults, the strongest spatial genetic structure was found for Q. petraea (Sp = 0.0187), followed by F. sylvatica (Sp = 0.0133), and the weakest in Q. robur (Sp = 0.0080). It was uniform across different age classes in pedunculate oak but decreased with age in sessile oak. No apparent relationship between age and spatial genetic structure was found in beech. Offspring exhibited significant spatial genetic structure (ranging from 0.0122 in beech to 0.0188 in sessile oak). The cohorts of seedlings having both parents present within the study site had stronger spatial genetic structures than cohorts of seedlings with only one local parent.

Conclusion

Spatial genetic structure is strong in naturally regenerating populations of heavy-seeded forest trees. Pollen immigration from outside of a local forest stand can significantly decrease the extent of spatial genetic structure in offspring generations.

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决定普通山毛榉（Fagus sylvatica L.）、有枝栎（Quercus robur L.）和无柄栎（Q. petraea (Matt.) Liebl.）共存种群内精细尺度空间遗传结构的因素

关键信息普通山毛榉、有柄橡树和无柄橡树的自然再生种群在成株和幼苗阶段形成了强大的空间遗传结构。生长在相距 60 米以内的个体之间具有显著的遗传关系。AimsWe investigated the extent of spatial genetic structure in three broad-leaved forest tree species (common beech-Fagus sylvatica L.; pedunculate oak-Quercus robur L.; and sessile oak-Q. petraea (Matt. ) Liebl.) coexist.Liebl.）共存于同一自然保护区，探讨了其在物种间和不同生命阶段（成体/后代）的变化，并测试了其可能的决定因素。方法我们探讨了个体的空间分布模式，并利用微位点估计了基于亲缘关系的空间遗传结构参数，同时考虑了可能的变异来源。结果在成体中，发现Q. petraea的空间遗传结构最强（Sp = 0.0187），其次是F. sylvatica（Sp = 0.0133），而Q. robur的空间遗传结构最弱（Sp = 0.0080）。在有枝栎中，不同年龄段的遗传力是一致的，但在无柄栎中，遗传力随年龄的增长而降低。榉树的年龄与空间遗传结构之间没有明显的关系。后代表现出明显的空间遗传结构（从榉树的 0.0122 到无柄栎的 0.0188）。与只有一个本地亲本的幼苗群组相比，双亲都在研究地点内的幼苗群组具有更强的空间遗传结构。来自当地林分以外的花粉移民会显著降低子代的空间遗传结构。

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来源期刊

Annals of Forest Science 农林科学-林学

CiteScore

6.70

自引率

3.30%

发文量

审稿时长

12-24 weeks

期刊介绍： Annals of Forest Science is an official publication of the French National Institute for Agriculture, Food and Environment (INRAE) -Up-to-date coverage of current developments and trends in forest research and forestry Topics include ecology and ecophysiology, genetics and improvement, tree physiology, wood quality, and silviculture -Formerly known as Annales des Sciences Forestières -Biology of trees and associated organisms (symbionts, pathogens, pests) -Forest dynamics and ecosystem processes under environmental or management drivers (ecology, genetics) -Risks and disturbances affecting forest ecosystems (biology, ecology, economics) -Forestry wood chain (tree breeding, forest management and productivity, ecosystem services, silviculture and plantation management) -Wood sciences (relationships between wood structure and tree functions, and between forest management or environment and wood properties)