Results 31 to 40 of about 2,914 (162)
Animals, 2023 Pterygoplichthys pardalis is an armored catfish native to South America and an important resource for the ornamental fish industry. Recently, several exotic populations have been introduced into rivers on five continents.
Alcimara dos Santos Guimarães +3 more
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Genetics and Molecular Biology, 2007 In this work we describe the cytogenetic analyses performed in specimens of Astylus variegatus (Germar, 1824) collected in two localities: one area of natural vegetation and one of agricultural crops, where agrochemical products were used.
Marielle Cristina Schneider +5 more
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Cytogenetic characterization of Hypostomus soniae Hollanda-Carvalho & Weber, 2004 from the Teles Pires River, southern Amazon basin: evidence of an early stage of an XX/XY sex chromosome system [PDF]
Comparative Cytogenetics, 2019 In the present study, we analyzed individuals of Hypostomus soniae (Loricariidae) collected from the Teles Pires River, southern Amazon basin, Brazil. Hypostomus soniae has a diploid chromosome number of 2n = 64 and a karyotype composed of 12 metacentric
Luciene Castuera de Oliveira +7 more
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Plants, 2022 Hemp (Cannabis sativa L.) is a valuable crop and model plant for studying sex chromosomes. The scientific interest in the plant has led to its whole genome sequencing and the determination of its cytogenetic characteristics.
Oleg S. Alexandrov +5 more
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Genetic studies on nucleolus organizer regions (NORs) in cattle
Genetical Research, 1989 SummaryExperimentally produced monozygotic twins, natural opposite sex blood chimeras (freemartins), and several pedigrees were used to evaluate the genetic influences on the nucleolus organizer region (NOR) patterns in cattle. In monozygotic twins, the NOR patterns of both twins are extremely similar. In chimeras, NOR patterns of genetically identical,
B, Mayr +3 more
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Chromosomal stasis in distinct families of marine Percomorpharia from South Atlantic
Comparative Cytogenetics, 2017 The weakness of physical barriers in the marine environment and the dispersal potential of fish populations have been invoked as explanations of the apparent karyotype stasis of marine Percomorpha, but several taxa remain poorly studied cytogenetically ...
Fabilene Gomes Paim +5 more
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Crossover Interference on Nucleolus Organizing Region-Bearing Chromosomes in Arabidopsis [PDF]
Genetics, 2005 Abstract In most eukaryotes, crossovers are not independently distributed along the length of a chromosome. Instead, they appear to avoid close proximity to one another—a phenomenon known as crossover interference. Previously, for three of the five Arabidopsis chromosomes, we measured the strength of interference and suggested a model ...
Sandy Y, Lam +5 more
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Genome Biology, 2021 Background Structural variants (SVs) significantly drive genome diversity and environmental adaptation for diverse species. Unlike the prevalent small SVs (< kilobase-scale) in higher eukaryotes, large-size SVs rarely exist in the genome, but they ...
Yumin Huang +10 more
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Chromosome mapping of a Tc1-like transposon in species of the catfish Ancistrus
Comparative Cytogenetics, 2017 The Tc1 mariner element is widely distributed among organisms and have been already described in different species of fish. The genus Ancistrus (Kner, 1854) has 68 nominal species and is part of an interesting taxonomic and cytogenetic group, as well as ...
Keteryne Rodrigues da Silva +3 more
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Journal of Dental School, 2019 Objectives The aim of this study is find a practical and easy way to histologically differentiate between two malignant tumors namely Adenoid Cystic Carcinoma (ACC) and Polymorphous Low-grade Adeno Carcinoma (PLGA) silver nitrate staining.
Mahbube Valipour Tahamtan +3 more
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