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Crossing over does occur in males of Drosophila ananassae from natural populations
(CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESSOTTAWA, 2012)
Spontaneous crossing over in males of Drosophila ananassae has been well demonstrated using F-1 individuals from crosses between marker stocks and wild type strains. However, the question of its occurrence in males from ...
Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae)
(Springer, 2013-08)
Background: Senecio is the largest genus in the Asteraceae family growing in all environments around the world. It displays taxonomic and systematical difficulties. Cytogenetic knowledge of this genus is ancient, scarce ...
Chromosome fusion polymorphisms in the grasshopper, Dichroplus fuscus (Orthoptera: Acrididae: Melanoplinae): Insights on meiotic effects
(Czech Academy of Sciences, 2015-01)
Robertsonian changes account for many of the changes in the evolution of the orthopteran karyotype; in their origin, a centric fusion is involved between two acro-telocentric chromosomes, forming a single bi-armed chromosome. ...
Variability along a latitudinal gradient in the chiasma frequency and morphological characters of Dichroplus pratensis (Orthoptera: Acrididae)
(Czech Academy of Science, 2005-03)
The grasshopper Dichroplus pratensis Bruner is polymorphic and polytypic for a complex Robertsonian system. In this species, centric fusions induce changes in number and position of chiasmata, and thus potentially affect ...
Meiotic differentiation in two allopatric population groups of the tetraploid frog Odontophrynus americanus from Argentina
(British Herpetological Society, 2008-10)
The Odontophrynus americanus species complex is widely distributed in South America and is formed of diploid and tetraploid cryptic species. We studied the meiotic prophase stages of two allopatric tetraploid population ...
Cytogenetic Analysis of Five Crotalaria Species (Papilionaceae)
(Universidad del Zulia, 2010)
Cytogenetic analysis in the terrestrial orchid Sacoila argentina (Griseb.) Garay from Paraguay
(Academia Sinica, 2010-03)
Sacoila argentina (Griseb.) Garay is a terrestrial orchid with ornamental value found in northern Argentina, Bolivia, and Paraguay and is considered an object of conservation within the Paraguayan Chaco region, only found ...