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Chromosome evolution in the cosmopolitan genus Lycium (Solanaceae)
(International Association for Plant Taxonomy, 2020-04)
Lycium is the only member of tribe Lycieae (Solanoideae, Solanaceae), and it has a cosmopolitan distribution with its greatest diversity in southern South America, southern Africa, and southwestern North America. To date, ...
Evaluation in situ of genotoxic and cytotoxic response in the diploid/polyploid complex Odontophrynus (Anura: Odontophrynidae) inhabiting agroecosystems
(Pergamon-Elsevier Science Ltd, 2019-02)
Polyploidization has been documented across a wide range of vertebrates. Gene duplication could promote better adaptation to environmental changes and to chronic injury or stress. We investigated if genotoxic and cytotoxic ...
Widening the gene pool of sexual tetraploid bahiagrass: Generation and reproductive characterization of a sexual synthetic tetraploid population
(Crop Science Society of America, 2018-03)
The improvement of bahiagrass, Paspalum notatum Flüggé, has been inhibited by reduced levels of genetic diversity in sexual tetraploid germplasm. A few experimental sexual tetraploid genotypes (ESTGs) have been generated ...
Mother knows best: plant polyploidy affects feeding and oviposition preference of the alligator weed biological control agent, Agasicles hygrophila
(Springer, 2019-12)
Alligator weed (Alternanthera philoxeroides (Martius) Grisebach) is an amphibious invasive plant native to South America. It is an allopolyploid that, in Argentina, possess two cytotypes, tetraploids and hexaploids. In the ...
Genome Size Variation Between the Native and Invasive Ranges of Senecio madagascariensis (Asteraceae)
(American Society of Plant Taxonomists, 2020-03)
The invasive species must colonize new habitats away from their native range; therefore, factors affecting plant dispersal play a key role in invasion. The ploidy level and the genome size (or Cx value) can affect the ...
Historical biogeography of the fern genus Polystichum (Dryopteridaceae) in Austral South America
(Academic Press Inc Elsevier Science, 2019-08)
A group of seven endemic Polystichum species inhabit Patagonia, the southern region of South America. To date, evolutionary relationships of these Austral South American Polystichum remain unknown. The biota of the Southern ...
Chromosome numbers, meiotic abnormalities, and 2n pollen formation in accessions of the wild species Chrysolaena flexuosa (Vernonieae, Compositae) from its distribution range in ArgentinaNúmero de cromosomas, anomalías meióticas y formación de polen 2n en accesiones de la especie silvestre Chrysolaena flexuosa (Vernonieae, Compositae) de su rango de distribución en Argentina
(Sociedad Argentina de Botánica, 2017-12)
Chrysolaena flexuosa is a South American species of potential ornamental value (basic chromosome number of x=10). Diploid (n=10) and tetraploid (n=20) cytotypes have been reported for its distribution area, although one ...
Focal spermatogenesis originated in euploid germ cells in classical Klinefelter patients.
(Oxford University Press, 2009-05)
background: Klinefelter syndrome is the most frequent chromosome abnormality in human males. This paper aims to investigate the ploidy of meiotic and pre-meiotic germ cells found in spermatogenic foci, and furthermore, the ...
Divergence time estimation and mapping of morphological and cytogenetical data in the southern South American geophyte genus Pterocactus (Cactaceae)
(International Association for Plant Taxonomy, 2021-06)
Pterocactus has 10 species endemic to restricted areas of the Argentine Monte and Patagonia regions, also growing in neighbouring Chile. We analysed phylogenetic relationships between its species, based on plastid DNA ...
Evidence of hybridization, mitochondrial introgression and biparental inheritance of the kdna minicircles in trypanosoma cruzi i
(Public Library of Science, 2020-01)
Background Genetic exchange in Trypanosoma cruzi is controversial not only in relation to its frequency, but also to its mechanism. Parasexual genetic exchange has been proposed based on laboratory hybrids, but population ...