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Wyświetlanie 1-4 z 4
Tytuł:
Czy kriokonserwacja jest bezpieczna? Określenie potencjalnych zmian w tkankach roślinnych poddanych kriogenicznemu przechowywaniu
Cryopreservation - is it safe? Possible changes in cryostored plant genetic resources
Autorzy:
Michalak, M.
Plitta, B.P.
Kotlarski, S.
Chmielarz, P.
Powiązania:
https://bibliotekanauki.pl/articles/990857.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ochrona zasobow genowych
tkanki roslinne
kriokonserwacja
zmiennosc fenotypowa
zmiennosc biochemiczna
zmiennosc genetyczna
cryopreservation
liquid nitrogen
epigenetics
preservation of genetic resources
Opis:
Cryopreservation (storage in liquid nitrogen, –196°C) is a technique that ensures safe, long−term conservation of plant species with recalcitrant seeds, vegetatively propagated species and biotechnology products such as somatic embryos, cell lines and genetically transformed material. The aim of cryostorage is to keep plant tissue in a safe way, which does not cause changes during storage at neither phenotypic, cytological and histological, biochemical, genetic nor epigenetic level. Therefore, before cryostorage will be applied for long−term preservation it should be thoroughly assess if it does not cause any injuries in plant material.
Źródło:
Sylwan; 2014, 158, 10; 795-800
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie zmienności genetycznej dla ochrony zasobów genowych cisa pospolitego w Europie
Importance of genetic variation for conservation of English yew genetic resources in Europe
Autorzy:
Litkowiec, M.
Plitta, B.P.
Lewandowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/991598.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
cis pospolity
Taxus baccata
zasoby genowe
zmiennosc genetyczna
ochrona zasobow genowych
genetic variation
genetic conservation
ex situ
in situ
english yew
Opis:
The genetic variation is considered to be a key factor for long−term survival of the species. The recognition of the existing genetic diversity is the preliminary phase in development of an effective strategy for conservation of forest tree species gene pools. Taxus baccata L. with a wide but scattered distribution in Europe is an example of rare and endangered species that needs both ex situ and in situ protection. The increase in fragmentation and isolation of populations and reduction in effective population size can cause erosion of the gene pool through increased genetic drift, increased inbreeding, reduced gene flow and decreased migration rate. As a result, local populations may be responsible for the loss of genetic variation, hence a decrease in their viability and adaptability. A few genetic analyses based on isozymes and DNA markers indicate that the yew, both in Poland and in other regions of Europe, is characterized by high levels of genetic variation within populations and moderate genetic differentiation between populations.
Źródło:
Sylwan; 2013, 157, 10; 754-760
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polodowcowa historia jodły pospolitej (Abies alba Mill.) w Polsce jako efekt migracji z różnych ostoi plejstoceńskich - dotychczasowy stan wiedzy
Postglacial history of silver fir (Abies alba Mill.) in Poland as a result of migration from different refugia - the current state of knowledge
Autorzy:
Litkowiec, M.
Lewandowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/973534.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
Abies alba
okres polodowcowy
zasieg wystepowania
leśnictwo
drzewa leśne
jodła pospolita
populacje roślin
zasięg występowania
zmienność genetyczna
ochrona zasobów genowych
genetic variation
genetic conservation
postglacial history
Albies alba Mill.
Opis:
The paper reviews the current knowledge about the genetic variation, glacial and postglacial history of Polish populations of silver fir (Abies alba Mill.). This species occurs in the mountainous forests of central and southern Europe, from the Pyrenees up to the Balkans, where it is important from both ecological and economical points of view. The current knowledge about glacial and postglacial history of fir has been obtained from palynological and genetic studies. During the last ice age A. alba survived in the refugia in southern Europe, the central Apennines, the south of the Balkan Peninsula and the Central Massif in France. Two other refugia remained isolated – one in Calabria in the south of the Apennines and one in the Pyrenees. Furthermore the most likely routes of postglacial recolonization of silver fir as well as the introgression zone between them have been identified. In Poland, silver fir reaches the north−eastern border of its natural range. Several earlier studies based on isozymes and DNA markers (mitochondrial and chloroplast) have reported that the Polish populations of fir are characterized by lower levels of genetic variation within populations and higher genetic differentiation between them than other coniferous species. Fir probably migrated to Poland from two glacial refugia located in the Balkan and Apennines Peninsula. Notwithstanding, a recent study on Polish silver fir populations carried out with mtDNA marker, strictly maternally inherited, indicated that the species migrated to the Polish territory from the refugium in western Europe. However, this study did not take into account the possibility of participation of pollen pool of Balkan origin in the formation of the Polish populations of fir. Until now, there have been only a few reports concerning the gene pool of fir in Poland. Therefore, it is necessary to supplement the knowledge about its genetic variation. In the course of several episodes of silver fir decline during the past century, its populations have decreased in size and currently are scattered throughout the entire European range. Reliable information on the distribution of genetic variation is a prere−quisite for proper management of forest genetic resources in a short−term and long−term perspective. The recognition of the existing genetic diversity is also the preliminary phase in development of an effective strategy for conservation of forest tree species gene pools.
Źródło:
Sylwan; 2015, 159, 02; 109-116
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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