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Wyszukujesz frazę "population variability" wg kryterium: Temat


Tytuł:
Morphological variability of leaves of Sorbus domestica L. in Croatia
Autorzy:
Poljak, I.
Kajba, D.
Ljubic, I.
Idzojtic, M.
Powiązania:
https://bibliotekanauki.pl/articles/57486.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
service tree
morphological variability
leaf
morphology
Sorbus domestica
population variability
geographic differentiation
ecological differentiation
Croatia
Opis:
The paper studies the morphological variability of the service tree populations in the continental and Mediterranean regions of Croatia. The inter- and intra-population variability, as well as eco-geographic population differentiation, was established on the basis of eight measured morphological characteristics of two types of leaflets (lateral and terminal) and two derived ratios, using descriptive and multivariate statistical methods. The conducted research established a high variability of morphological characteristics. In comparison with lateral leaflets, terminal leaflets showed a higher degree of variability for the majority of the studied variables. The differences between the trees within populations, as well as the differences between populations, were confirmed for all studied characteristics. The study also confirmed a trend of population variations according to the eco-geographic principle. Populations from climatically different and geographically distant habitats, in other words from the Mediterranean and the continental region, differed in the majority of studied characteristics. In addition to the established pattern of ecotypical variability between the continental and the Mediterranean regions, the clinal variability with regard to altitude and mean annual temperature was also confirmed. Small, although statistically significant clinal variability with regard to the longitude was recorded for two measured characteristics. The conducted study provided insights into the variability of the service tree populations in Croatia, which is a basis for further research that should be implemented in order to produce guidelines for the breeding and conservation of genetic resources of this rare and endangered noble hardwood species.
Źródło:
Acta Societatis Botanicorum Poloniae; 2015, 84, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variation in acorn traits among natural populations of Quercus alnifolia, an endangered species in Cyprus
Autorzy:
Anagiotos, G.
Tsakaldimi, M.
Ganatsas, P.
Powiązania:
https://bibliotekanauki.pl/articles/41714.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
variation
acorn trait
natural population
Quercus alnifolia
endangered species
seed germination
desiccation
golden oak
plant morphology
population variability
Cyprus
Opis:
Quercus alnifolia is an endemic species in Cyprus, and it is rated as Vulnerable (VU) in the Red List of Oaks. Although Q. alnifolia has a great ecological importance, there are only few studies about this species. In this work we have studied the natural variability of this species by analyzing acorn dimensions, acorn mass, length of embryo, moisture content of acorns and seed germinability among the seven acorn provenances, collected in Cyprus. We also determined the seeds responses to drying. Germination trials were also carried out, and differences in seed germination among populations were examined. Rate of water loss and its effect on seed germination was also estimated by application of specific desiccation treatments. The results showed that acorn characteristics significantly differed between the populations, following a general trend to reduce their dimensions and mass with the altitude increase. Seed germination was high for all studied populations, and germination behaviour was similar for all populations. Desiccation of acorns below 35% resulted in a great reduction of seed germination capacity.
Źródło:
Dendrobiology; 2012, 68
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emergence and collapse of the Frasnian conodont and ammonoid communities in the Holy Cross Mountains, Poland
Autorzy:
Dzik, J
Powiązania:
https://bibliotekanauki.pl/articles/21673.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Ammonoidea
paleobiology
Conodonta
Polska
collapse
population variability
conodont
community
Frasnian
change
Devonian
evolution
Holy Cross Mountains
paleontology
ammonoid
Opis:
The dominant factor in faunal succession of conodonts in the Frasnian of Poland is the apparent immigration of species originating allopatrically in other regions. Each immigration event usually changes the population variability of a local species (character displacement). Only a few lineages show their phyletic evolution within the studied area. Attempts to distinguish conodont species on the basis of platform element shape failed in some of the latest Frasnian palmatolepidids. Even at the apparatus−based generic level, certain ramiform elements of the apparatus appear much more diagnostic than the platforms. Correlative value of the late Frasnian palmatolepidids of unknown apparatus structure is thus questionable. The evolution of platform elements in Ancyrodella offers a more solid basis for age determination although their great population variability makes resolution rather low and requires the population approach. The panderodontids Belodella(?) tenuiserrata sp., B. minutidentata sp. nov., B. robustidentata sp. nov., prioniodontid Icriodus kielcensis sp. nov., enigmatic monospecific Playfordiidae fam. nov., prioniodinids Dyminodina planidentata gen. et sp. nov., D. anterodenticulata sp. nov., D. kovalensis sp. nov., Pluckidina kielcensis gen. et sp. nov., P. slupiensis sp. nov., P. robustipegmata sp. nov., and P. lagoviensis sp. nov., derived polygnathid Avignathus bifurcatus sp. nov., probably secondarily simplified polygnathid Nicollidina gen. nov., and palmatolepidids Kielcelepis gen. nov., Lagovilepis gen. nov. and Klapperilepis gen. nov. are proposed.
Źródło:
Acta Palaeontologica Polonica; 2002, 47, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variability in selected Polish population of Dreissena polymorpha [Pallas] [Bivalvia; Dreissenidae]
Autorzy:
Zielinski, R
Soroka, M
Wachowiak-Zielinska, M
Powiązania:
https://bibliotekanauki.pl/articles/2047704.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
genetic variability
Polska
Bivalvia
Dreissena polymorpha
enzyme polymorphism
population
Dreissenidae
Opis:
Genetic variability of a selected population of Dreissena polymorpha, an invasive species playing a significant role in aquatic ecosystems, was studied. Starch gel electrophoresis was used to analyse 8 enzymatic loci in 200 individuals collected from 20 sites in a lake. The population was found to have 75.0% of polymorphic loci, 2.8 alleles per locus, 3.5 alleles per polymorphic locus, 0.393 coefficient of expected heterozygosity, and 149 genotypes. Zebra mussel clumps were strongly polymorphic; almost every individual had a different genotype. The high polymorphism observed in the D. polymorpha clumps had most likely resulted from external cross-fertilisation and the presence of free-swimming veliger larvae as well as from a considerable heterozygosity of individual bivalves. Genetic variability of the population studied was found to be similar to that of populations inhabiting other Western Pomeranian lakes, including both highly polluted ones and those formed as recently as about 40 years ago. This provides evidence for a mass colonisation of freshwater reservoirs effected by very polymorphic parent populations of D. polymorpha. The literature data on North American zebra mussel populations which invaded that continent about 10 years ago show them to be polymorphic, too, but not as much as European ones.
Źródło:
Journal of Applied Genetics; 1996, 37, 1; 105-120
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological and chemical variability within the population of common avens (Geum urbanum L.)
Zróżnicowanie morfologiczne i chemiczne w obrębie populacji kuklika pospolitego (Geum urbanum L.)
Autorzy:
Kuczerenko, A.
Krawczyk, M.
Przybyl, J.L.
Geszprych, A.
Angielczyk, M.
Baczek, K.
Weglarz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/71684.pdf
Data publikacji:
2011
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
morphological variability
chemical variability
plant population
common avens
Geum urbanum
herb
phenolic compound
tannin
phenolic acid
eugenol
Opis:
The aim of the study was an ex situ evaluation of morphological and chemical variability within the population of common avens. Plant height, number of shoots, stage of generative development (number of flower buds, flowers, and fruits), as well as weight of herb and underground organs were determined. In the raw materials total content of tannins and content of particular phenolic compounds identified by HPLC was determined. In underground organs also content of eugenol – the dominant constituent of essential oil was assessed. High diversity of morphological traits (especially weight of herb and underground organs) and the content of determined compounds (especially in herb) was found. Above- and underground organs differed in the composition and content of phenolic compounds. Underground organs were characterised by higher content of flavan-3-ols, but they did not contain chlorogenic acid, which was the dominant phenolic compound in herb.
Celem pracy była ocena zróżnicowania morfologicznego i chemicznego w populacji kuklika pospolitego w warunkach jego uprawy. Określono wysokość roślin, liczbę pędów kwiatowych, stopień rozwoju generatywnego (liczbę pąków kwiatowych, kwiatów i owoców) oraz masę ziela i organów podziemnych. W zebranych surowcach oznaczono ogólną zawartość garbników oraz zawartość poszczególnych związków fenolowych zidentyfikowanych przy użyciu HPLC. W organach podziemnych określono również zawartość eugenolu – głównego składnika olejku eterycznego. Stwierdzono wyraźne zróżnicowanie badanych osobników pod względem cech morfologicznych, a zwłaszcza masy ziela i organów podziemnych, a także zawartości oznaczanych związków, szczególnie w zielu. Organy nadziemne i podziemne różniły się pod względem składu i zawartości związków fenolowych. Organy podziemne charakteryzowały się wyższą zawartością flawan-3-oli. Nie stwierdzono w nich natomiast obecności kwasu chlorogenowego, który był dominującym związkiem fenolowym w zielu.
Źródło:
Herba Polonica; 2011, 57, 2
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The variability of natural populations of Brachypodium pinnatum and B. sylvaticum based on morphological features
Autorzy:
Paszko, B
Powiązania:
https://bibliotekanauki.pl/articles/58097.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
variability
natural population
Brachypodium pinnatum
Brachypodium sylvaticum
morphological feature
Poaceae
Polska
Opis:
The morphological diversity in 25 populations of two native species of Brachypodium occurring in Poland, was studied. Principal component analysis and cluster analysis of morphometric data segregate specimens or populations of Brachypodium into two groups, corresponding to the two species. In most of morphological characters, B. pinnatum and B. sylvaticum are similar to each other. However, in terms of characteristics, such as the hairiness of culms and leaf-sheaths both can also vary much within a single population. In comparison with B. pinnatum, B. sylvaticum always has pubescent abaxial palea surfaces. Apparent differences were not detected between the two ecotypes of B. pinnatum named "Grassland" and "Woodland".
Źródło:
Acta Societatis Botanicorum Poloniae; 2008, 77, 3; 255-262
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variability of Pinus sylvestris populations from IUFRO 1982 provenance trial
Autorzy:
Androsiuk, P.
Urbaniak, L.
Powiązania:
https://bibliotekanauki.pl/articles/40971.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
genetic variability
Scotch pine
Pinus sylvestris
plant population
molecular marker
provenance trial
Opis:
Provenance trials were designed to analyse the quantitative responses of tree species to environmental variables found in different experiment location. However, we have still limited knowledge how natural and artificial selection affects genetic variation of the species populations gather in such experimental sites. We have used bulked DNA-based RAPD and ISJ analysis to investigate genetic diversity and differentiation of Scots pine populations from two Polish locations of IUFRO 1982 provenance trial placed in Kórnik and in Supraśl. Applied categories of DNA markers differed in terms of revealing genetic diversity of the species. Ten RAPD primers applied in the study yielded a total of 75 bands, of which 21 (28%) and 15 (20%) were polymorphic in Kórnik and in Supraśl, respectively. Six ISJ primers revealed 42 bands of which 4 (9.52%) and 14 (33.3%) were polymorphic in Kórnik and in Supraśl, respectively. The genetic diversity and differentiation was low, as expressed by He=0.071 and He=0.085, and by genetic distance values which ranged from 0.0 to 0.240 (on average 0.081) and from 0.017 to 0.188 (on average 0.094) for Kórnik and Supraśl, respectively. Location of provenance trial appeared to have a significant influence on revealed level of genetic polymorphism and pattern of interpopulation differentiation. However, genetic structure found for analysed Scots pine provenances from IUFRO 1982 in Kórnik was also confirmed for Supraśl experimental site. In the light of available data we also discussed the influence of historical migration routes and gene flow on observed genetic variation of the species.
Źródło:
Dendrobiology; 2014, 71
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological, phenological and agronomical characterisation of variability among common bean (Phaseolus vulgaris L.) local populations from The National Centre for Plant Genetic Resources: Polish Genebank
Autorzy:
Boros, L.
Wawer, A.
Borucka, K.
Powiązania:
https://bibliotekanauki.pl/articles/1870.pdf
Data publikacji:
2014
Wydawca:
Instytut Ogrodnictwa
Tematy:
morphological variability
phenological variability
agronomic characteristics
common bean
Phaseolus vulgaris
dry bean
local population
cluster analysis
gene bank
genotypic variation
Źródło:
Journal of Horticultural Research; 2014, 22, 2
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of pubescent oak (Quercus pubescens Willd.) by means of chloroplast DNA (cpDNA) in the western part of the Balkan Peninsula
Autorzy:
Ballian, D.
Ivankovic, M.
Grycan, J.
Peric, S.
Marjanovic, H.
Bobinac, M.
Slade, D.
Powiązania:
https://bibliotekanauki.pl/articles/57477.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
pubescent oak zob.downy oak
downy oak
oak
Quercus pubescens
chloroplast
cpDNA
Balkan Peninsula
genetic variability
population diversity
plant population
Opis:
In the area of the western Balkans, xerothermal broad-leaf forests hold a very special position, the main species being pubescent oak (Quercus pubescens Willd.). The study comprises 36 populations of pubescent oak from Croatia, Bosnia and Herzegovina, Montenegro, Kosovo, Albania and Macedonia. Genetic variability and population diversity was analysed on chloroplast DNA in order to determine to which haplotype an individual or studied population belongs, as well as how they are related. For the detection of one haplotype analysed four sequences (AS, TF, DT and CD) on the chloroplasts DNA. The results of the analysis suggest that there are six different haplotypes of pubescent oak (2, 4, 5, 17, 31, 33) in the studied populations. Two more sub-haplotypes were found in haplotype 5 (a and b), but only in populations occurring in Croatia and Bosnia and Herzegovina. The results suggest the great variability of pubescent oak in the researched area, which is generally characteristic of other species from the area of the Balkan Peninsula. The results obtained by means of cpDNA analysis can help in the formation of seed zones. However, due to the strong selection pressure of unplanned logging, and the possible introduction of herbal material of unknown origin, it is necessary to find a sufficient number of autochthonous entities (i.e., populations of the researched species) as well as new suitable markers for their characterization. The results of this paper constitute a scientifically recognised, partial examination of the origin of the starting forest reproductive material from the broader geographic area, thus serving future projects on its regeneration.
Źródło:
Acta Societatis Botanicorum Poloniae; 2010, 79, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current status of the population of Epipactis palustris (L.) Crantz (Orchidaceae) in the Wielkopolska National Park
Autorzy:
Kluza-Wieloch, M.
Wyrzykiewicz-Raszewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/790605.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
present state
plant population
variability
Epipactis palustris
marsh helleborine
orchid
Orchidaceae
Wielkopolski National Park
Opis:
The aim of this study was to determine the current status of the population of marsh helleborine at a locality in the Wielkopolska National Park. Variability in generative shoots was analysed. Recorded results were compared with a study published in the 1990's, in which this locality was described. Since that time the area covered by that population has decreased; nevertheless, it exhibits characteristics of being in a good condition. In that population three forms of that species were reported: f. palustris, f. longibracteata and f. ochroleuca. The greatest threat for the existence of that heliophilous orchid was connected with the overgrowing of its habitat, for this reason measures should be taken to prevent succession and encroachment of trees and shrubs to that area.
Źródło:
Steciana; 2016, 20, 4
1689-653X
Pojawia się w:
Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The variability of reed [Phragmites australis [Cav.] Trin. ex Steud. [Poaceae]] populations expressed in morphological traits of panicles
Autorzy:
Krzakowa, M
Kolodziejczak, M.
Drapikowska, M.
Jakubiak, H.
Powiązania:
https://bibliotekanauki.pl/articles/57623.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Phragmites australis
variability
morphological trait
reed
Poaceae
intraspecific variation
panicle morphology
population
Odra River
plant
Opis:
Using a transect technique, each of 12 reed Phragmites australis (Cav.) Trin ex Steud. populations collected in middle part of Odra River-basin, represented by more than 30 plants, were compared with 3 populations from other part of the country and 1 from France. Each panicle was examined according to 15 morphological traits. Results of measurements were subjected to multivariate analysis of variance, to analysis of canonical variables and used for construction of a minimum spanning tree (= dendrite) on the basis of the shortest Mahalanobis distances. The obtained results indicate that populations are generally similar. One population from France (Orleans) shows visible separateness. It may suggest that morphological traits of panicles may be useful in investigations of the reed P. australis populations of a larger geographical distribution.
Źródło:
Acta Societatis Botanicorum Poloniae; 2003, 72, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intraspecific variability of great burnet (Sanguisorba officinalis L.) in respect of sterols content
Zróżnicowanie wewnątrzgatunkowe krwiściągu lekarskiego (Sanguisorba officinalis L.) pod względem zawartości związków sterolowych
Autorzy:
Mirgos, M.
Przybyszewska, E.
Capecka, E.
Angielczyk, M.
Przybyl, J.L.
Baczek, K.
Weglarz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/71356.pdf
Data publikacji:
2012
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
intraspecific variability
great burnet
Sanguisorba officinalis
Rosaceae
sterol content
sterol
plant population
wild plant
herb
Opis:
The content and composition of sterol compounds in wild growing great burnet (Sanguisorba officinalis L.) populations were determined. The herb and underground organs of this plant were collected from 10 natural sites in Poland. The HPLC analysis revealed the presence of 5 sterol compounds, namely β-sitosterol, β-sitosterol D-glucoside, campesterol, brassicasterol and stigmasterol in these raw materials. Among them, β-sitosterol Dglucoside was dominant one. The herb was richer in sterol compounds than underground organs. There were significant differences between the content of above mentioned compounds in these populations.
Badano skład i zawartość związków sterolowych w dziko rosnących populacjach krwiściągu lekarskiego. Ziele i organy podziemne zbierane były z roślin występujących na 10 stanowiskach naturalnych zlokalizowanych na terenie Polski. Analiza chromatograficzna wykazała obecność pięciu związków sterolowych w tych surowcach, a mianowicie β-sitosterolu, D-glukozydu β-sitosterolu, kampesterolu, brassikasterolu i stigmasterolu. Spośród nich D-glukozyd β-sitosterolu był związkiem dominującym, przy czym ziele okazało się bogatsze we wszystkie zidentyfikowane związki w porównaniu z organami podziemnymi. Stwierdzono istotne różnice pomiędzy populacjami odnośnie zawartości wyżej wymienionych związków sterolowych.
Źródło:
Herba Polonica; 2012, 58, 3
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological variability of Fraxinus angustifolia Vahl in the north-western Balkans
Autorzy:
Jarni, K.
Westergren, M.
Kraigher, H.
Brus, R.
Powiązania:
https://bibliotekanauki.pl/articles/58877.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Balkans
Fraxinus angustifolia
fruit
morphological variability
morphometric analysis
narrow-leaved ash
plant variation
shaded leaf
plant population
Opis:
Fraxinus angustifolia Vahl is a species native in the north-western Balkans, where it has a divided range. Most of its range is located in flood-prone riparian sites in the Pannonian plain but the species is also found on humid sites along some rivers in the Submediterranean region. We analysed morphologic variation within and between five populations (14 trees/population) located in the Subpannonian and Submediterranean region of Slovenia. Thirty two characters were assessed on ca. 80 leaves from each tree which were divided depending on exposure to sunlight (sun and shade leaves), and 8 traits on each fruit (ca. 50 fruits/tree). A hierarchically designed experiment using analysis of variance confirmed the significant contribution of all the analysed hierarchical levels of variation to the total variation. The results show that the differences between the trees in a single population are the greatest factor of variability of leaves, followed by differences between populations and differences which are the result of variation in exposure to sunlight. Leaves in shade positions are typically larger than those in sunny positions, and they have broader and shorter-pointed leaflets; in this feature they are very similar to the leaves of F. excelsior. Stepwise discriminant analysis showed that the traits which refer to the leaflet number and length are the best differentiating traits between individual populations. The Submediterranean population Dragonja stands out with the smallest leaves and the population Lijak from the same region is the most similar to Dragonja for most morphological traits. In general, phenotypic differences between the Subpannonian and the Submediterranean populations of F. angustifolia are minor and indistinct. Based on the differences ascertained by the study, we can only confirm the presence of F. angustifolia subsp. oxycarpa (Bieb. ex Willd.) Franco et Rocha Alfonso in this part of its natural range.
Źródło:
Acta Societatis Botanicorum Poloniae; 2011, 80, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of selected traits of Ips typographus (L.) (Col.: Scolytinae) populations in Beskid Zywiecki (Western Carpathians, Poland) region affected by bark beetle outbreak
Autorzy:
Grodzki, W.
Starzyk, J.R.
Kosibowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/38516.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
variability
Ips typographus
Scolytinae
Coleoptera
animal population
Beskid Zywiecki Mountains
Carpathians Mountains
Polska
bark beetle
beetle
outbreak
Opis:
In 2010–2012, investigations on Ips typographus populations were carried out in Norway spruce stands recently affected by bark beetle outbreak in the Beskid Żywiecki Mts. in Poland. The aim of the study was to test the usefulness of several traits describing I. typographus populations for evaluation of their actual outbreak tendency. Infestation density, sex ratio, gallery length, progeny number and beetle length were used as the traits. Trait variability was analyzed in relation to infested tree mortality in the current year of observation and outbreak tendency defined by the comparison of data on tree mortality in the current year and that in the year before. The highest infestation density was found in the stands representing the highest tree mortality in the current year and in those characterized by decreasing outbreak tendency. The gallery system with 2 maternal galleries dominated. The sex ratio of attacking beetles inclined towards females (63.8%) and remained stable during 3 years of observations; the highest percentage of females was found in locations being in stabilization/latency outbreak phase. The length of maternal galleries was somewhat negatively affected by infestation density and positively correlated with the number of progeny in the gallery. The average beetle length was 4.800 mm (± 0.293), ranging between 3.718 and 5.817 mm and being the highest in the uppermost class of tree mortality recorded in the current year of observation. The shortest beetles were collected in the stands with increasing outbreak tendency, and slightly longer – in the stands with outbreak stable and decreasing tendencies. None of the traits tested can be selected as a direct indicator for prediction of outbreak tendency in I. typographus populations. Possible reasons of variability in the analyzed traits are discussed. The traits indicate that I. typographus in the study area represent very high reproductive potential, thus the risk of repeated outbreak is very high.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2014, 56, 2
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PCR-RFLP-based molecular studies on inter-population variability in the crucian carp (Carassius carassius L.)
Autorzy:
Kempter, J.
Panicz, R.
Makowska, M.
Metza, M.
Keszka, S.
Kielpinski, M.
Sadowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/841729.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
PCR-RFLP method
molecular study
interpopulation variability
carp
crucian carp
Carassius carassius
Cyprinidae
fish
population genetics
restriction enzyme
Opis:
Genetic variability of three sympatric crucian carp ( Carassius carassius ) populations from NW Poland was studied within a research project aimed at assessing the utility of those populations for stocking in inland waters. DNA samples were collected from 65 individuals. Restriction analysis was performed using 4 enzymes (HaeIII, HinfI, FspBI, TasI) of known restriction sites. The restriction pro files obtained were classified as belonging to a single haplotype (H-1). Selected DNA products were sequenced; the subsequent comparison made it possible to detect the presence of substi- tutions in the genome fragment analysed.
Źródło:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica; 2011, 18
1230-3976
Pojawia się w:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica
Dostawca treści:
Biblioteka Nauki
Artykuł

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