Results 91 to 100 of about 2,455 (197)

Dysdera parthenogenetica sp. nov. (Araneae, Dysderidae): A Unique Case of Parthenogenesis in Spiders

Journal of Zoological Systematics and Evolutionary Research, Volume 2025, Issue 1, 2025.
We studied the parthenogenetic lineages of the spider Dysdera hungarica (Araneae: Dysderidae). Based on our data, we consider them to constitute a separate taxon, Dysdera parthenogenetica sp. nov. Morphologically, the new species differs mainly by slightly reduced female copulatory organs.
Milan Řezáč, Jiří Král, Ivalú Macarena Ávila Herrera, Martin Forman, Veronika Řezáčová, Nela Gloríková, Petr Heneberg, Miroslawa Dabert   +7 more
wiley   +1 more source

Ribosomal DNA clusters and telomeric (TTAGG)n repeats in blue butterflies (Lepidoptera, Lycaenidae) with low and high chromosome numbers

Comparative Cytogenetics, 2015
Ribosomal DNA clusters and telomeric repeats are important parts of eukaryotic genome. However, little is known about their organization and localization in karyotypes of organisms with holocentric chromosomes.
Alisa O. Vershinina, Boris A. Anokhin, Vladimir A. Lukhtanov   +2 more
doaj   +1 more source

Chromosome number of the potato cyst nematode Globodera rostochiensis [PDF]

, 1996
Le nombre de chromosome de #Globodera rostochiensis$ a été déterminé par l'analyse de leurs configurations bivalentes au stade métaphase I, de cellules au stade de réduction méiotique pendant l'oogenèse, et de cellules en mitose somatique au cours de ...
Bakker, J., Gommers, F.J., Helder, J., Pijnacker, L.P., Rouppe Van der Voort, J.N.A.M., Van Enckevort, E.L.J.G.   +5 more
core  

Genome analysis of Diploscapter coronatus: insights into molecular peculiarities of a nematode with parthenogenetic reproduction [PDF]

, 2017
BACKGROUND: Sexual reproduction involving the fusion of egg and sperm is prevailing among eukaryotes. In contrast, the nematode Diploscapter coronatus, a close relative of the model Caenorhabditis elegans, reproduces parthenogenetically.
Hiraki, H, Kagoshima, H, Kohara, Y, Kraus, C, Kroiher, M, Schierenberg, E, Schiffer, PH, Ueta, Y   +7 more
core   +2 more sources

A targeted gene phylogenetic framework to investigate diversification in the highly diverse yet geographically restricted red devil spiders (Araneae, Dysderidae)

Cladistics, Volume 40, Issue 6, Page 577-597, December 2024.
ABSTRACT The family Dysderidae is a highly diverse group of nocturnal ground‐dwelling and active‐hunter spiders. Dysderids are mostly restricted to the Western Palearctic, and particularly rich and abundant around the Mediterranean region. Interestingly, the distribution of species richness among its 24 genera and three subfamilies is highly biased—80%
Silvia Adrián‐Serrano, Martina Pavlek, Miquel A. Arnedo   +2 more
wiley   +1 more source

Cytogenetic and molecular characterization of the MBSAT1 satellite DNA in holokinetic chromosomes of the cabbage moth, Mamestra brassicae (Lepidoptera) [PDF]

, 2003
Digestion of Mamestra brassicae DNA with DraI produced a prominent fragment of approximately 200 by and a ladder of electrophoretic bands with molecular weights which are a multiple of 200 bp.
F. Marec, MANDRIOLI, Mauro, MANICARDI, Gian Carlo   +2 more
core   +1 more source

Genomic hotspots of chromosome rearrangements explain conserved synteny despite high rates of chromosome evolution in a holocentric lineage

Molecular Ecology, Volume 33, Issue 24, December 2024.
Abstract Holocentric organisms, unlike typical monocentric organisms, have kinetochore activity distributed along almost the whole length of the chromosome. Because of this, chromosome rearrangements through fission and fusion are more likely to become fixed in holocentric species, which may account for the extraordinary rates of chromosome evolution ...
Marcial Escudero, André Marques, Kay Lucek, Andrew L. Hipp   +3 more
wiley   +1 more source

Localization of 45S rDNA and telomeric sites on holocentric chromosomes of Rhynchospora tenuis Link (Cyperaceae)

Genetics and Molecular Biology, 2003
Rhynchospora tenuis Link (Cyperaceae) is a weed widely distributed in Brazil that presents a small number of holocentric chromosomes (2n = 4) with some autopolyploid populations (2n = 8). The haploid number n = 2 is considered as a derivative of the base
André L.L. Vanzela, Angeles Cuadrado, Marcelo Guerra   +2 more
doaj   +1 more source

Holocentric repeat landscapes: From micro‐evolutionary patterns to macro‐evolutionary associations with karyotype evolution

Molecular Ecology, Volume 33, Issue 24, December 2024.
Abstract Repetitive elements can cause large‐scale chromosomal rearrangements, for example through ectopic recombination, potentially promoting reproductive isolation and speciation. Species with holocentric chromosomes, that lack a localized centromere, might be more likely to retain chromosomal rearrangements that lead to karyotype changes such as ...
Camille Cornet, Pablo Mora, Hannah Augustijnen, Petr Nguyen, Marcial Escudero, Kay Lucek   +5 more
wiley   +1 more source

Morphological and genomic characterization of Rhynchospora tenuis complex (Cyperaceae) and its taxonomic implications

Rodriguésia
Species of Rhynchospora sect. Tenues are morphologically very similar. Rhynchospora tenuis complex is the most problematic species complex in this group and it concentrates entities of difficult delimitation, as is the case of R. tenuis, R. tenuis subsp.
Vanessa Silva Michelan, Rafael Trevisan, Carlos Roberto Maximiano da Silva, Rogério Fernandes de Souza, Modesto Luceño, André Luís Laforga Vanzela   +5 more
doaj   +1 more source