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Wyszukujesz frazę "variability" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Variability of Pinus uncinata Ramond ex DC as expressed in needle traits
Zmienność igieł Pinus uncinata Ramond ex DC
Autorzy:
Boratynska, K.
Bobowicz, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/41754.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
variability
statistical analysis
pine
morphoanatomy
Spain
Pinus uncinata
needle trait
Opis:
Two-year needles were collected from 42 trees from 5 localities in Spanish Pyrenees. The needles were analysed in respect to 15 morphological and anatomical traits. Data obtained were subject of multivariate statistical analyses. The most stable traits appear to be width of epidermis cells, width and thickness of the needles and ratio of the last two characters. Number of the resin canals and the vascular bundles distance were the most variable characters. The differences among the 42 investigated trees are not evident, considerably small and not significant statistically.
Praca zawiera szczegółową analizę zmienności igieł P. uncinata. Materiał pochodził z 5 różnych naturalnych stanowisk z 42 drzew z hiszpańskich Pirenejów. W badaniach uwzględniono 15 cech morfologicznych i anatomicznych a uzyskane wyniki z pomiarów poddano szczegółowej analizie statystycznej. Ustalono, że zmienność między drzewami w badanej populacji P. uncinata jest stosunkowo niewielka i nie istotna statystycznie. Najbardziej stabilnymi cechami okazały się iloraz grubości i szerokości igły (cecha14), szerokość komórek epidermy (cecha11), szerokość i grubość igły (cechy 7 i 8) a także grubość komórek epidermy (cecha 10) i liczba szparek po obydwu stronach igły (cechy 4 i 5). Współczynniki zmienności dlawspomnia nych cech nie przekraczają 9%. Największe różnice, jednak statystycznie nie istotne, obserwowano w liczbie kanałów żywicznych (cecha 6) i w odległościach między wiązkami (cecha 9) oraz we współczynniku Marceta (cecha12).
Źródło:
Dendrobiology; 2000, 45
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological variability of Juniperus phoenicea [Cupressaceae] from three distant localities on Iberian Peninsula
Autorzy:
Mazur, M
Boratynska, K.
Marcysiak, K.
Gomez, D.
Tomaszewski, D.
Didukh, J.
Boratynski, A.
Powiązania:
https://bibliotekanauki.pl/articles/57298.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
variability
cone
juniper
statistical analysis
locality
Cupressaceae
biometry
Iberian Peninsula
Juniperus phoenicea
morphological differentiation
Opis:
The aim of the present study was biometrical comparison of three Iberian populations of Juniperus phoenicea, represented by the subsp. turbinata and subsp. phoenicea. Eight features of the cones and seeds, two of the shoots and leaves were studied. The biometrical analysis of three distant populations of J. phoenicea shows great taxonomic distances among them. Two of them, representatives of J. phoenicea subsp. turbinata, are closer related each other than to the third, which represents J. phoenicea subsp. phoenicea. These results confirm the genetic differentiation of the taxons and also the biochemical and morphologic division of them. Nevertheless, the distances between particular populations are so great that more resemble the distances between species than between subspecies.
Źródło:
Acta Societatis Botanicorum Poloniae; 2003, 72, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of Pinus uliginosa cones from the peat-bog in Węgliniec
Autorzy:
Marcysiak, K
Boratynska, K.
Mazur, M.
Powiązania:
https://bibliotekanauki.pl/articles/41639.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
variability
cone
Wegliniec
statistical analysis
Torfowisko pod Weglincem Reserve
pine
Polska
morphology
Pinus uliginosa
peat bog
Opis:
Cones of Pinus uliginosa from the "Torfowisko pod Węglińcem" reserve were tested biometrically, on the basis of 16 characters.The obtained data were statistically analysed.The cone scale width, the ratio of cone length/width and the maximal diameter of cone were the most stable, while the cone scale thickness and the ratio of cone scale length/thickness were the most variable of the cone characters.The intrapopulational differentiation was not big.The examined pine species has cones with characters which are intermediate between Pinus sylvestris, P. mugo and P. uncinata.
Źródło:
Dendrobiology; 2003, 49
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of needle characters of Pinus mugo Turra populations in the Karkonosze Mountains in Poland
Autorzy:
Sobierajska, K
Boratynska, K.
Powiązania:
https://bibliotekanauki.pl/articles/41473.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Polska
Karkonosze Mountains
mountain pine
subalpine plant
Pinus mugo
needle variability
morphological characteristics
anatomical characteristics
plant variation
plant conservation
plant population
Opis:
The basic aim of the work was to widen the knowledge about variation of Pinus mugo in the Karkonosze (Giant) Mountains and verification of provenance of several, probably planted populations on that basis. Seven populations were sampled, four on hardly accessible precipices of glacial cirques as natural, and three on the topical, mostly plane or only slightly in clined parts of the mountains as potentially alien ones. The variation of the needles was biometrically analyzed in respect of 23 morphological and anatomical characters. Measurement data were subject of multivariate statistical analyses. Results call attention on rather continuous variability of P. mugo in the Karkonosze Mts. The differences among samples were found as relatively low and no direct connections have been detected between variation and provenance from precipices versus plane sites.
Źródło:
Dendrobiology; 2008, 59; 41-49
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geographic distribution of quantitative traits variation and genetic variability in natural populations of Pinus mugo in Central Europe
Autorzy:
Boratynska, K.
Dzialuk, A.
Lewandowski, A.
Marcysiak, K.
Jasinska, A.K.
Sobierajska, K.
Tomaszewski, D.
Burczyk, J.
Boratynski, A.
Powiązania:
https://bibliotekanauki.pl/articles/41495.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
geographic distribution
quantitative trait
variation
genetic variability
genetic diversity
isoenzyme
natural population
Pinus mugo
phenotypic diversity
chloroplast
microsatellite
Central Europe
Europe
Opis:
Divergence in genetic as well as phenotypic structures can be expected in species with disjunctive geographic ranges and restricted gene flow among isolated populations. Dwarf mountain pine has such a disjunctive geographic range in the mountains of Central Europe. We hypothesised that populations of Pinus mugo from the Giant Mts. differ from Alpine and Carpathian populations to a greater extent than differentiation within these regions; furthermore, these differences would be detectable at both the genetic and phenotypic levels. To verify this hypothesis, the diversity and differentiation within and among eleven populations from the Giant Mts., Carpathians and Alps were analysed using 19 isozyme isozyme loci, 17 needle and 15 cone morphological characters. Moreover, the data on 10 chloroplast microsatellites used in the previous study, were reanalysed. The differences between the three regions were greater than among populations within them. The microsatellites and isozymes clearly differentiated between regions, while in the multivariate analyses of cone and needle characters the Alpine and Carpathian populations were intermingled but distinct from those sampled in the Giant Mts. The significant genetic structuring among regions may result from an ancient fragmentation and long lasting geographic isolation between the Giant Mts., Alps and Tatras. The populations from the Giant Mts., the northernmost within the geographic range of P. mugo, presented lower level of genetic variation then those from the Alps and Carpathians. The pattern of genetic structure observed in dwarf mountain pine may be characteristic of wind-pollinated trees with a disjunctive geographic distribution
Źródło:
Dendrobiology; 2014, 72
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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