Temat: gene conservation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ecological and genetic aspects of distribution of the marginal populations of Swiss stone pine (Pinus cembra L.) in Ukrainian Carpathians
Autorzy:: Mohytych, Vasyl
Klisz, Marcin
Yatsyk, Roman
Hayda, Yuriy
Sishchuk, Mariana
Powiązania:: https://bibliotekanauki.pl/articles/2042495.pdf
Data publikacji:: 2019
Wydawca:: Instytut Badawczy Leśnictwa
Tematy:: Swiss stone pine
Eastern Carpathian mountains
habitats fragmentation
gene conservation
marginal population
Opis:: Current distributions of Swiss stone pine mostly cover the mountain regions of Europe (Alps and Carpathians). Easternmost distribution of this species is located in western Ukraine. Due to environmental fragmentation in Eastern Carpathians and competition with Norway spruce and other species, marginal populations of Swiss stone pine create isolated island, where other species are not able to cope with harsh conditions. Still, Pinus cembra L. play an important role for soil-formation and soil-protection in high elevations. The evidence of recent reduction in the area of Swiss stone pine raises the question whether the introduction of this species at lower altitudes can be successful? According to the studies conducted on reciprocal transplant experiments, Swiss stone pine population from higher elevation are able to profit in low elevation sites. Thus, parallelly with gene conservation activity, the possibilities of assisted migration should be recognized for this species.
Źródło:: Folia Forestalia Polonica. Series A . Forestry; 2019, 61, 3; 242-246
0071-6677
Pojawia się w:: Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Distribution of Lihtuanian Scots pine trees according to breeding categories and their seed production in seed stands
Autorzy:: Gabrilavicius, R
Powiązania:: https://bibliotekanauki.pl/articles/41345.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: Scotch pine
seed stand
gene conservation
seed collection
tree
seed bearing
Lithuania
distribution
seed
Opis:: In addition to other traits, value of stands for breeding can be evaluated according to the number of plus trees and productive trees. According to this property, stands with the highest value for breeding are located in eastern Lithuania. Trees start to differentiate into breeding categories at the juvenile stage: in Scots pine stands on Pinetum myrtillosum sites, at the age of 6to 8 years and in Scots pine stands on Pinetum vacciniosum sites, at age of 10 to 12 years. According to radial increment, the trees start to differentiate into selection categories of productive, medium and minus trees, which often remain in these categories until mature age. The following four types of radial increment of trees were distinguished: (1) fast growth at the juvenile stage, followed by a gradual decrease, (2) fast growth at the juvenile stage, followed by a stable growth from age 20 to 30 years, (3) slow growth at the juvenile stage, followed gradual increase, (4) unstable growth all the time. In Lithuania, abundant seed yield used to occur in three to four year intervals. Populations with abundant flowering may produce approximately 10 kg of seeds (filled and empty) per ha, while the populations with weak flowering - 1 to 2 kg per ha. In mature Scots pine stands of stocking level ca 0.7, 6to 8% of the seeds are produced by plus trees, 24% by productive trees, 55 to 60% by trees of medium productivity and 10% by minus trees. Being suppressed, minus trees produce 2% of the seeds only.
Źródło:: Dendrobiology; 2002, 47 Supplement
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Stand structure and natural regeneration of Taxus baccata at "Stiwollgraben" in Austria
Autorzy:: Dhar, A
Ruprecht, H.
Klumpp, R.
Vacik, H.
Powiązania:: https://bibliotekanauki.pl/articles/41025.pdf
Data publikacji:: 2006
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: English yew
Taxus baccata
yew
tree species
Austria
gene conservation
natural regeneration forest
stand structure
population structure
vitality
yew decline
Opis:: English yew (Taxus baccata L.) is a rare tree species in Austria and gene conservation forests reserves are used to maintain English yew populations by silvicultural treatments. This paper describes the current situation of an English yew population at “Stiwollgraben”in Austria with regard to stand structure, vitality and natural regeneration. The area is one of the most important sites in Austria as it consists of 2236 yews.The vitality condition of the yew is very good, and more than 79% of the yews have been assessed as very vital to vital. The potentiality for natural regeneration (13019 one-year seedlings ha–1) is very high, but not all height classes are represented. This indicates a high survival ability of English yew at this site. Three different treatment strategies are described to maintain the yew population. The future effects of these treatments are discussed in the light of the environmental requirements of English yew.
Źródło:: Dendrobiology; 2006, 56; 19-26
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Gene conservation and breeding programmes for Picea abies in Lithuania: present-day achievements
Autorzy:: Danusevicius, J
Gabrilavicius, R.
Danusevicius, D.
Powiązania:: https://bibliotekanauki.pl/articles/41718.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: international conference
Europe
forest ecosystem
plant breeding
tree
Norway spruce
Picea abies
breeding programme
Lithuania
gene conservation
genetic resource
provenance
plant population
Opis:: At present, Norway spruce stands occupy 22% of the total forest area in Lithuania. Most of them are located in the northeastern highland (Žemaitija) and the central part of the country. 25% of the spruce-dominated stands are pure, the rest are mixed. Natural calamities like storms, droughts, and pests cause substantial damage and occur quite frequently. About 40 thousand ha of stands are cut after each storm. The mean wood yield of the spruce stands is 304 m3 ha-1, and the current annual increment is 6.2 m3 ha-1. The climatic conditions of Lithuania are variable enough to cause differentiation of habitats. For Norway spruce, 6 provenance regions have been established. The national gene conservation programme is based on (a) in situ genetic reserves, seed collection stands, and selected genotypes, and (b) ex situ clonal archives, seed orchards, experimental plantations, and gene bank collections. The present-day breeding of Norway spruce comprises family tests of populations for individual and population selection, and plans for inter-population hybrids. A strategy for Norway spruce breeding has been approved for the years 2004-2013. There is a genetically diverse material for future breeding: long-distance provenance tests, and population and family tests. Assessments of two provenance tests (aged 9 and 17 years) in central Lithuania revealed superior performance of central and northeastern Polish provenances: superior height, good stem quality, and late bud-burst in spring. This may be attributed to the favourable effect of transfer: avoidance of spring frosts (late bud-burst and good stem quality), and utilisation of the later part of the growing period for growth (late bud-set and superior height). Norway spruce is a climax species with different domestic and Darwinian fitness. Therefore, we suggest that the domestic fitness of local genotypes may be improved by introducing a few Polish clones in Lithuanian breeding populations.
Źródło:: Dendrobiology; 2009, 61 Supplement
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Strategy for long-term breeding of Picea abies in Lithuania: short overview
Autorzy:: Danusevicius, D
Powiązania:: https://bibliotekanauki.pl/articles/41309.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: international conference
Europe
forest ecosystem
plant breeding
tree
Norway spruce
Picea abies
long-term breeding
Lithuania
breeding strategy
future strategy
breeding programme
gene conservation
Opis:: This paper presents the newly suggested long-term breeding strategy for Norway spruce in Lithuania to share with the optimisation approach, which may be useful in synchronising the long-term breeding and gene conservation plans in neighbouring regions. The breeding programme in Lithuania is at a stage where the long-term plans need to be developed. Our strategy is to proceed with a closed-nucleus breeding population which is structured into subpopulations according to adaptation zones (4-5 subpopulations). The size of each subpopulation is 50 unrelated and progeny-tested individuals. The breeding cycle consists of double- pair mating and a balanced within-family selection forward. The candidates will be clone-tested. Advanced genotypes will be selected into an advanced nucleus; an isolated foreign breeding population is planned. Positive assortative mating is used for deployment. An experimental "shuttle-breeding" strategy may be tested: selection with avery high intensity, controlled crosses, nursery tests for vigour and growth rhythm, cloning by hedges into short-rotation clonal plantations.
Źródło:: Dendrobiology; 2009, 61 Supplement
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Gene pool conservation programme of Norway spruce Picea abies (L.) Karst. in the Beskid Mts
Autorzy:: Jurasek, M
Powiązania:: https://bibliotekanauki.pl/articles/41497.pdf
Data publikacji:: 2004
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: Czech Republic
Czech State Forests
Norway spruce
Picea abies
conservation
reproduction
seed orchard
clone
artificial regeneration
seed stand
gene pool conservation
conservation programme
seed bank
Opis:: The paper describes the measures adopted by the Czech State Forests for the conservation and reproduction of the Norway spruce gene pool in the Moravian-Silesian Beskid Mts. In addition to the assurance of natural regeneration in genetically valuable stands and the use of high-quality autochthonous stands as seed sources for artificial regeneration, the measures include selection of plus-trees, establishment of seed orchards, seed stands and clone archives, and identification of gene pools. Seeds of the most valuable regional populations are deposited in a seed bank.
Źródło:: Dendrobiology; 2004, 51 Supplement
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Utility of two mitochondrial markers for identification of Picea abies refugial origin
Autorzy:: Litkowiec, M
Dering, M.
Lewandowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/41333.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: coniferous plant
tree
Norway spruce
Picea abies
mtDNA
molecular marker
mitochondrial marker
identification
polymerase chain reaction
RFLP analysis
gene pool conservation
forest ecosystem
plant population
Opis:: Picea abies (L.) Karst is one of the most important coniferous species of Europe from both ecological and economical points of view. Traditional methods for the gene pool conservation and biodiversity maintenance in forest ecosystems have been practiced in many countries. For progress in this field using highly polymorphic genetic molecular markers is needed. Our goal was to demonstrate the utility of two polymorphic mitochondrial markers mt15-D02 and nad1 b/c in identification native Norway spruce stands. This molecular markers were tested in 1401 individuals from 59 Polish Norway spruce populations. We detected three alleles, which are called1, 2 and3, for locus mt15-D02 and two alleles , which are called1 and2, for locus nad1 b/c in our material. All five variants of alleles indicate the natural origin of P. abies. Result of this study shows that molecular marker mt15-D02 is easy to use and more informative in compare to marker nad1 b/c.
Źródło:: Dendrobiology; 2009, 61; 65-71
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Salix myrtilloides in north central Poland. Distribution, threats and conservation
Autorzy:: Churski, M
Danielewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/41057.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: glacial relict
willow
Polska
locality
habitat loss
Salix myrtilloides
distribution
threat
conservation
habitat protection
gene pool
strategy
Opis:: Present status of a postglacial relict – Salix myrtilloides L. was investigated in north central Poland at 27 localities. Consequently 3 sites were confirmed, 4 were not confirmed, and the remaining 20 were considered to be extinct. In comparison to the historical distribution, ca. 74% of the sites existing 50 years ago do not exist today in the studied region. The confirmed populations were found near Oporówek (ca. 1600 stems), Rakowiec (ca. 100) and Bobrowo (15). At three sites confirmed in this study, the existence of vigorous hybrids between S. myrtilloides and S. aurita L. (S. ×onusta Besser) were observed. The most important threats to Salix myrtilloides L. populations in the studied region were assessed to be hybridization with other commonly occurring willow species, site isolation and habitat destruction. Natural habitat protection with adequate buffer zone and gene pool protection in a form of plantations was suggested as a conservation strategy. As an alternative strategy active protection ‘insitu’ was proposed based on cutting competitive common species of willows.
Źródło:: Dendrobiology; 2008, 60; 3-9
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki