Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 7

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Genetic structure of a single population of Pleurozium schreberi [Musci, Hylocomiaceae] detected by isoenzyme electrophoresis

100%
Zielinski R., Wachowiak-Zielinska M.
Fragmenta Floristica et Geobotanica
|
1995
|
tom 40
|
nr 1
2

Some remarks on peroxidase isoenzyme expression in Plagiochila asplenioides [Hepaticae, Plagiochilaceae]

100%
Zielinski R., Wachowiak-Zielinska M.
Fragmenta Floristica et Geobotanica
|
1994
|
tom 39
|
nr 2
3

Genetic variation of the haploid moss Pleurozium schreberi [Musci, Hylocomiaceae] from Poland

100%
Wachowiak-Zielinska M., Zielinski R.
Fragmenta Floristica et Geobotanica
|
1995
|
tom 40
|
nr 1
4

Isozyme variation in Polish populations of Plagiochila asplenioides and P. porelloides [Hepaticae, Plagiochilaceae]

100%
Zielinski R., Wachowiak-Zielinska M.
Fragmenta Floristica et Geobotanica
|
1994
|
tom 39
|
nr 2
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Genetic variability in selected Polish population of Dreissena polymorpha [Pallas] [Bivalvia; Dreissenidae]

81%
Zielinski R., Soroka M., Wachowiak-Zielinska M.
Journal of Applied Genetics
|
1996
|
tom 37
|
nr 1
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.
6

Electrophoretic polymorphism of three enzymes, PX, GOT and LAP, in a single population of Pleurozium schreberi [Musci, Hylocomiaceae] from Poland

81%
Zielinski R., Wachowiak-Zielinska M., Soroka M.
Fragmenta Floristica et Geobotanica
|
1994
|
tom 39
|
nr 2
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Distribution, genetic structure and ecological role of Dreissena polymorpha (Pallas) in Lake Dabie, Western Pomerania, Poland

61%
Piesik Z., Zielinski R., Wachowiak-Zielinska M., Ochman T., Soroka M., Polok K.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
|
1998
|
tom 02
Dreissena polymorpha inhabits about 46.5% of the bottom area in Lake Dabie. It is most abundant in the northern part of the lake and sporadically occurs in its southern part. The average density of the zebra mussel is 891 individuals/m², while its wet weight is 1374 g/ m². In the settled areas the density of the zebra mussel reaches 1734 individuals/ m². There were presently established 7 age-groups from 0 to 6+. The highest number of specimens occurred in the age-groups between 1+ and 3+, while the lowest number - in the groups 0, 5 and 6+. Strong eutrophication and pollution of Lake Dabie on its southern side, combined with sedimentation of the extensive amounts of seston carried in by the Płonia and Regalica rivers, do not create favourable conditions for development of Dreissena. D. polymorpha plays a very positive role in the lake ecosystem through its biofiltrating action, contributing thus to an increase of water clarity and to limitation of phytoplankton development through cumulating nutrients in its biomass. Electrophoretic analysis of 9 enzymatic loci revealed strong polymorphism of the studied population of the zebra mussel: percent of polymorphic loci - 100, mean number of alleles in locus – 3.4, coefficient of expected heterozygosity per locus in the population, HS - 0.335, percentage of separate genotypes - 69%, in this number unique genotypes - 58%. A very strong scattering of the alleles was stated within the entire population. In each aggregation, on average, 90% of the specimens have a separate genotype. Each of the five defined groups of D. polymorpha, representing profiles I-V, respectively, had similar genetic composition. The values of the genetic similarity among the studied groups of the zebra mussel ranged from 0.96 to 0.99.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.