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1

Intraspecies differentiation of Paramecium triaurelia.I.Strains from Spain

100%
Przybos E.
Folia Biologica
|
1995
|
vol. 43
|
issue 1-2
5-7
EN
The genetic differentiation of strains within Paramecium triaurelia was studied by intra- and inter-strain crosses of the Spanish strains from Castile and Andalusia and the standard one (strain 324 from Florida, USA).The clones of both generations F1 obtained by conjugation and F2 by autogamy, in intra- and inter-strain crosses showed a high survival rate.It was found that strains coming from remote regions were not genetically differentiated within P.triaurelia, which confirms the moderate inbreeding type of the breeding system of the studied species.
2

New habitats of species of the Paramecium aureliacomplex in Russia and Vietnam

100%
Przybos E., Fokin S.
Folia Biologica
|
1996
|
vol. 44
105-106
EN
Two strains from Russia, one collected in Stary Peterhof, St. Petersburg and the second one in Irkutsk near Lake Baikal, both bearing two types of endosymbiont - Caedibacter sp. in the cytoplasm and Holospora caryophila in the macronucleus, were identified as Paramecium biaurelia. The strain originating from Hanoi, Vietnam was determined as Paramecium primaurelia, this strain has no endosymbionts.
3

Paramecium novaurelia, relation of distant strains

100%
Przybos E.
Folia Biologica
|
1999
|
vol. 47
|
issue 1-2
29-31
EN
The results of intra- and inter-strain crosses carried out in and between the strains from Spain, Poland, and Turkey, and the standard one (510, Scotland) of Paramecium novaurelia are presented. The inter-strain crosses were also made between the studied strains. The results showed that strains coming from the distant regions of Europe (i.e. from Spain, Poland, Scotland) and from Asiatic part of Turkey were not genetically differentiated within P. novaurelia. In the studied species of the P. aurelia complex there exists a type of breeding system which can be called moderate inbreeding.
4

Intraspecies differentiation of Paramecium triaurelia (Ciliophora, Protista). IV. Strains from Ukraine

100%
Przybos E.
Folia Biologica
|
1998
|
vol. 46
105-108
EN
The results of intra- and inter-strain crosses carried out between the Ukrainian strains and the standard one are presented. Also inter-strain cross was made between strains from distant regions of Europe, i.e. from Spain and Ukraine. The results showed that strains coming from different localities in Ukraine as well as from the distant regions of Europe, i.e. Spain and Ukraine, or even originating from Europe and the USA, were not genetically differentiated within P. triaurelia. The studied strains can interbreed in spite of their geographical isolation. The results indicate that in the studied species of the P. aurelia complex there exists a type of breeding system which can be called moderate inbreeding.
5

Intraspecies differentiation of Paramecium triaurelia. II. Strains from Romania

100%
Przybos E.
Folia Biologica
|
1996
|
vol. 44
27-29
EN
A high percentage of surviving clones of F1 and F2 generations was observed in intra- and inter-strain crosses of the studied Romanian strains. A similar survival was also found in the inter-strain crosses of the Romanian strains with the standard (324) strain of the species, and in the crosses of both Romanian strains with the strains from Spain. Hybrids of the inter-strain crosses did not show any cytological disorders in the nuclear apparatus. The results prove the absence of genetic barriers between the studied strains, coming from Romania and Spain, and the American one.
6

Paramecium biaurelia ? relation of strains

100%
Przybos E.
Folia Biologica
|
2002
|
vol. 50
|
issue 1-2
57-60
EN
Inter- and intra-strain crosses were made in Paramecium biaurelia of the P. aurelia species complex for studying the relation of strains within the species. Altogether ten strains originating from Scotland, Spain, Romania, Czech Republic, Ukraine, Italy, Germany, Russia, and Poland (two strains) were studied. A high percentage of surviving clones in both generations, F1 (obtained by conjugation) and F2 (obtained by autogamy), was observed in strain crosses, indicating a strong relation between the strains, and absence of genetic barriers between them in P. biaurelia.
7

Intraspecies structure of Paramecium pentaurelia

88%
Przybos E.
Folia Biologica
|
1999
|
vol. 47
|
issue 1-2
25-27
EN
The results of crosses carried out between the strains originating from regions of Europe distant from each other, i.e. from Spain and Hungary as well as between them and the standard strain of P. pentaurelia from Pennsylvania, USA are presented. It seems that the studied strains are not genetically differentiated within P. pentaurelia and that the species is characterized by moderate inbreeding.
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