SELECTION OAK SEEDLING FOR THE RAPID GROWTH BASED ON MORPHOLOGICAL AND CYTOGENETIC INDICATORS

The plantations of the pedunculate oak (Quercus robur L) are the most valuable forestry, ecological, economic and environmental resource. To implement measures for the reproduction of forests, it is necessary to create artificial plantations with planting material with improved hereditary properties. In this regard, the selection of high-quality seeds and fast-growing seedlings of Quercus robur is an extremely topical issue. For the study, we selected objects of oak forests, which have a different degree of recreational load, but are located in identical forest conditions. When collecting experimental material and analyzing the data obtained, generally accepted breeding approaches and methods of statistical processing of results were used. The method of selection by phenotype and fixation of a trait in the offspring justifies itself, but requires acceleration and deepening of knowledge in this direction with the use of modern methods of marker selection. In this connection, the purpose of the work on identifying additional selection criteria that allows for the selection assessment of seedlings is relevant. A close correlation has been established between the height of seedlings and the mitotic index; the height of the seedlings and the pathology of mitosis. It is proposed to use the mitotic index without taking into account cells at the stage of prophase and pathology of mitosis as additional criteria for selecting seedlings for growth rate. On the basis of a comprehensive assessment of the above morphological and cytogenetic characteristics, it is recommended to select highly adaptive and fast-growing seedlings to create forest cultures of Quercus robur

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Growth and management of mixed Pinus sylvestris - Quercus robur stands in Flanders, Belgium

Silva Gandavensis ◽

10.21825/sg.v58i0.880 ◽

1993 ◽

Vol 58 ◽

Cited By ~ 1

Author(s):

D. Maddelein ◽

J. Neirynck ◽

G. Sioen

Keyword(s):

Pinus Sylvestris ◽

Natural Regeneration ◽

Quercus Robur ◽

Good Growth ◽

Pedunculate Oak ◽

Selection System ◽

Management Options ◽

Stand Management ◽

Pine Stands

Mature Scots pine (Pinus sylvestris L.) stands are dominating large parts of the Flemish forest area. Broadleaved species regenerate spontaneously under this pine canopy. This study studied the growth and development of two planted pine stands with an older natural regeneration, dominated by pedunculate oak (Quercus robur L.), and discussed management options for similar stands. The results indicated a rather good growth of the stands, with current annual increments of 5 m3.ha-1.yr-1. The pine overstorey is growing into valuable sawwood dimensions, while the broadleaved understorey slowly grows into the upperstorey. The quality of the regeneration is moderate but can be improved by silvicultural measurements (pruning, early selection). In both stands, an interesting (timber production, nature conservation) admixture of secondary tree species is present in the regeneration. Stand management is evolving from the classical clearcut system towards a combination of a type of selection and group selection system.

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Chloroplast DNA Variation and Phylogeography of Pedunculate Oak Quercus robur L. in the Eastern Part of the Range

Russian Journal of Genetics ◽

10.1134/s1022795421010130 ◽

2021 ◽

Vol 57 (1) ◽

pp. 47-60

Author(s):

S. A. Semerikova ◽

I. Yu. Isakov ◽

V. L. Semerikov

Keyword(s):

Chloroplast Dna ◽

Quercus Robur ◽

Pedunculate Oak ◽

Dna Variation ◽

Chloroplast Dna Variation

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Population genetic structure of pedunculate oak (Quercus robur L.) in Belarus according to the analysis of chloroplast DNA

Journal of the Belarusian State University Biology ◽

10.33581/2521-1722-2021-3-59-70 ◽

2021 ◽

pp. 59-70

Author(s):

Vladimir E. Padutov

Keyword(s):

Genetic Structure ◽

Chloroplast Dna ◽

Population Genetic Structure ◽

Population Genetic ◽

Quercus Robur ◽

Phylogenetic Trees ◽

Rflp Analysis ◽

Pedunculate Oak ◽

Maximum Likelihood Methods ◽

The Republic

Pedunculate oak (Quercus robur L.) is one of the main forest forming species in the Republic of Belarus. Its population genetic structure was formed under the influence of various migration processes. Six chloroplast DNA loci (µdt1, µdt3, µdt4, µcd4, µcd5 and µkk4) were used for the genogeographic study. The material for the analysis was collected in 100 oak forest stands (2325 samples); 18 allelic variants were identified, which are grouped into 17 different combinations (haplotypes). Five of them are widespread (the proportion of occurrence varies from 7 to 48 %, totalling 85 %). The remaining 12 are rare (the proportion of occurrence varies from 1 to 3 %, totalling 15 %). Phylogenetic trees constructed using the nearest neighbour and maximum likelihood methods show the presence of two groups (branches) of haplotypes. One of it comprises 8 variants including 2 dominant haplotypes and the other comprises 9 variants including 3 dominant haplotypes. PCR-RFLP analysis of chloroplast DNA showed that the pedunculate oak in Belarus originates from the Balkan refugium. Haplotype No. 1 (µdt189, µdt3123, µdt4142, µcd494, µcd574, µkk4109) is found almost everywhere in Belarus with the exception of the southwest and northeast, while haplotype No. 8 (µdt189, µdt3121, µdt4142, µcd494, µcd574, µkk4109) is mainly localised in the southwest and northeast. Haplotypes No. 3 (µdt189, µdt3120, µdt4141, µcd494, µcd575, µkk4109) and No. 7 (µdt189, µdt3122, µdt4142, µcd494, µcd574, µkk4109) predominantly found in the west of the country. Haplotype No. 2 (µdt190, µdt3120, µdt4141, µcd495, µcd574, µkk4109) is typical for the southeast.

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Appreciation of tolerance at the impact of thermal stress on photosystem ii activity in the leaves of pedunculate oak (Quercus robur L.) trees of different ecological origin

Journal of Botany ◽

10.52240/1857-2367.2021.1(22).04 ◽

2021 ◽

Vol 13 (1(22)) ◽

pp. 13-20

Author(s):

Petru Cuza ◽

Keyword(s):

Thermal Stress ◽

Photosystem Ii ◽

Quercus Robur ◽

Central Area ◽

Extreme Weather Events ◽

Pedunculate Oak ◽

Adaptation Capacity ◽

Oak Trees ◽

Photosystem Ii Activity ◽

The Impact

Extreme weather events with high temperatures and strong sunlight have increased alarmingly in the last few decades, considerable affecting plant photosynthesis. In this study, the impact of thermal stress on photosystem II activity in the leaves of pedunculate oak trees (Quercus robur L.) of different ecological origin was assessed. Four days after the thermal shock application with a temperature of 50°C during 20, 40, 60 minutes, the processes of recovery on photosystem II activity in the leaves of the oak trees in the investigated provenances took place with different speed and fullness. The recovery of the functional state of photosystem II in the leaves of the trees showed that in the environmental conditions of the ,,Plaiul Fagului” reservation territory an advanced thermotolerance to the thermal stress action was specifi c for the origin from the north of the country (Edinet). The leaves of the trees of local and southern origin showed a low resistance to the thermal stress action. The advanced adaptation capacity, the high growth rate of the trees from the northern provenance suggest that the acorn harvested from the oaks of northern origin can be used for the works of extension of the afforestation areas in the central area of the Republic of Moldova.

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Acorn size influence on the quality of pedunculate oak (Quercus robur L.) one-year old seedlings

REFORESTA ◽

10.21750/refor.8.02.72 ◽

2019 ◽

Author(s):

Jovana Devetaković ◽

◽

Marina Nonić ◽

Bojan Prokić ◽

Vladan Popović ◽

...

Keyword(s):

Quercus Robur ◽

Pedunculate Oak ◽

Acorn Size ◽

One Year

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Oak Species Quercus robur L. and Quercus petraea Liebl. Identification Based on UHPLC-HRMS/MS Molecular Networks

Metabolites ◽

10.3390/metabo11100684 ◽

2021 ◽

Vol 11 (10) ◽

pp. 684

Author(s):

Gaëlle Buche ◽

Cyril Colas ◽

Laëtitia Fougère ◽

Emilie Destandau

Keyword(s):

Quercus Robur ◽

Quercus Petraea ◽

Molecular Network ◽

Molecular Networks ◽

Venn Diagram ◽

Pedunculate Oak ◽

Pure Species ◽

Wide Range ◽

Fragmentation Patterns ◽

The Individual

Two species of oak are dominant in French forests: pedunculate oak (Quercus robur L.) and sessile oak (Quercus petraea Liebl.). Their differentiation is not straightforward but is essential to better understand their respective molecular content in order to better valorize them. Thus, to improve oak species identification, an untargeted UHPLC-HRMS/MS method associated with a two-step data treatment was developed to analyze a wide range of specialized metabolites enabling the comparison of both species of oak extracts. Pooled extracts from sessile and pedunculate oaks, composed of extracts from several trees of pure species from various origins, were compared using first the Venn diagram, as a quick way to get an initial idea of how close the extracts are, and then using a molecular network to visualize, on the one hand, the ions shared between the two species and, on the other hand, the compounds specific to one species. The molecular network showed that the two species shared common clusters mainly representative of tannins derivatives and that each species has specific molecules with similar fragmentation patterns, associated in specific clusters. This methodology was then applied to compare these two pooled extracts to unknown individuals in order to determine the species. The Venn diagram allowed for the quick presumption of the species of the individual and then the species could be assigned more precisely with the molecular network, at the level of specific clusters. This method, developed for the first time, has several interests. First, it makes it possible to discriminate the species and to correctly assign the species of unknown samples. Moreover, it gave an overview of the metabolite composition of each sample to better target oak tree utilization and valorization.

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