Results 1 to 10 of about 1,515 (185)
Genetic Diversity in the Paramecium aurelia Species Complex [PDF]
Molecular Biology and Evolution, 2009 Current understanding of the population genetics of free-living unicellular eukaryotes is limited, and the amount of genetic variability in these organisms is still a matter of debate. We characterized-reproductively and genetically-worldwide samples of multiple Paramecium species belonging to a cryptic species complex, Paramecium aurelia, whose ...
Francesco Catania, Alexey Potekhin
exaly +7 more sources
Massive colonization of protein-coding exons by selfish genetic elements in Paramecium germline genomes [PDF]
PLoS Biology, 2021 Ciliates are unicellular eukaryotes with both a germline genome and a somatic genome in the same cytoplasm. The somatic macronucleus (MAC), responsible for gene expression, is not sexually transmitted but develops from a copy of the germline micronucleus
Frédéric Guérin +2 more
exaly +3 more sources
A Ninth Variety of Paramecium aurelia [PDF]
Journal of General Microbiology, 1954 SUMMARY: A new variety of Paramecium aurelia—variety 9—containing two mating types XVII and XVIII, has been identified from seven samples of water collected in Scotland. Variety 9 belongs to the group A varieties in the Sonneborn system of classification, but shows no interparietal mating reactions.
G Beale, Myrtle V. Schneller
openalex +3 more sources
Limited Mutation-Rate Variation Within the Paramecium aurelia Species Complex [PDF]
G3: Genes, Genomes, Genetics, 2018 Mutation is one of the most fundamental evolutionary forces. Studying variation in the mutation rate within and among closely-related species can help reveal mechanisms of genome divergence, but such variation is unstudied in the vast majority of ...
Hongan Long +2 more
doaj +2 more sources
Species-Specific Duplication of Surface Antigen Genes in Paramecium [PDF]
Microorganisms, 2022 Paramecium is a free-living ciliate that undergoes antigenic variation and still the functions of these variable surface antigen coats in this non-pathogenic ciliate remain elusive.
Marcello Pirritano +3 more
doaj +2 more sources
Measurements of the swimming speeds of motile microorganisms using object tracking and their correlation with water pollution and rheology levels [PDF]
Scientific Reports, 2021 Self-propelled microscopic organisms are ubiquitous in water. Such organisms’ motility depends on hydrodynamic and physical factors related to the rheology of the surrounding media and biological factors depending on the organisms’ state and well-being ...
Ashaa Preyadharishini Shunmugam +2 more
doaj +2 more sources
Complex evolutionary patterns within the tubulin gene family of ciliates, unicellular eukaryotes with diverse microtubular structures [PDF]
BMC BiologyBackground Tubulins are major components of the eukaryotic cytoskeletons that are crucial in many cellular processes. Ciliated protists comprise one of the oldest eukaryotic lineages possessing cilia over their cell surface and assembling many diverse ...
Hua Su +6 more
doaj +2 more sources
The first case of linkage in Paramecium aurelia [PDF]
Genetical Research, 1969 In Paramecium aurelia, syngen 4, gene ts21m, which is shown to segregate normally and independently of two other genes: ts111 and m1; is closely linked to gene ts401. The frequency of then recombination is of the order of a few per cent. Genetic analysis was carried out to confirm the genotypes of both double mutants and wild-type recombinants among F2
Janine Beisson, Michèle Rossignol
openalex +4 more sources
BMC Genomics, 2017 Background The 15 sibling species of the Paramecium aurelia cryptic species complex emerged after a whole genome duplication that occurred tens of millions of years ago.
Linda Sperling +2 more
exaly +3 more sources
Kappa and other endosymbionts in Paramecium aurelia. [PDF]
Bacteriological Reviews, 1974 John R. Preer, L B Preer, A. Jurand
openalex +4 more sources