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Karyotype Conservation in 2 Populations of the Parthenogenetic Scorpion Tityus serrulatus (Buthidae): rDNA and Its Associated Heterochromatin Are Concentrated on Only One Chromosome
(Oxford University Press, 2010-07-01)
Within the order Scorpiones, the parthenogenetic mode of reproduction has been described for 11 species, 6 of which belong to the genus Tityus. In this work, an investigation of the chromosome characteristics of 2 populations ...
NUCLEOLAR CHROMOSOME VARIANTS IN STERNOPYGUS-MACRURUS (PISCES, STERNOPYGIDAE) FROM 3 BRAZILIAN RIVER BASINS
(Univ Florence Botany Inst, 1993-01-01)
The karyotypes, location of nucleolus organizer regions (NOR) and constitutive heterochromatin pattern of Sternopygus macrurus (Pisces, Gymnotoidei) of natural populations from the Amazon River, Sao Francisco River and ...
Nucleolar chromosome variants in Sternopygus macrurus (Pisces, Sternopygidae) from three Brazilian river basins
(1993-01-01)
The karyotypes, location of nucleolus organizer regions (NOR) and constitutive heterochromatin pattern of Sternopygus macrurus (Pisces, Gymnotoidei) of natural populations from the Amazon River, Sao Francisco River and ...
Increased B chromosome frequency and absence of drive in the fish Prochilodus lineatus
(1997-11-01)
The neotropical freshwater fish species Prochilodus lineatus (Pisces, Prochilodontidae) shows 2n = 54 chromosomes plus supernumerary microchromosomes ranging in number from zero to seven among different animals. The ...
Cytogenetic markers as a tool for characterization of hybrids of Astyanax Baird & Girard, 1854 and Hyphessobrycon Eigenmann, 1907
(Pensoft Publishers, 2020-05-27)
Astyanax Baird et Girard, 1854, is one of the largest genera in the family Characidac and comprises 177 valid species. This genus has been the focus of cytogenetic studies primarily owing to the presence of B chromosomes ...
Cytogenetic markers as a tool for characterization of hybrids of Astyanax Baird & Girard, 1854 and Hyphessobrycon Eigenmann, 1907
(2020-01-01)
Astyanax Baird et Girard, 1854, is one of the largest genera in the family Characidae and comprises 177 valid species. This genus has been the focus of cytogenetic studies primarily owing to the presence of B chromosomes ...
Allopatric chromosomal variation in Nematocharax venustus Weitzman, Menezes & Britski, 1986 (Actinopterygii: Characiformes) based on mapping of repetitive sequences
(Soc Brasileira Ictiologia, 2016-01-01)
Characiformes is the most cytogenetically studied group of freshwater Actinopterygii, but karyotypical data of several taxa remain unknown. This is the case of Nematocharax, regarded as a monotypic genus and characterized ...
Comparative cytogenetics in different populations of the cavernicolous diplopod Pseudonannolene strinatii (Diplopoda, Pseudonannolenidae)
(Fundação Zoobotânica do Rio Grande do Sul, 2013-03-01)
Diferentes populações de Pseudonannolene strinatii Mauriès, 1974 coletadas em três cavernas em Iporanga, Estado de São Paulo, Brasil foram comparadas citogeneticamente utilizando-se técnicas de coloração convencional, ...
Astylus variegatus (Coleoptera, Melyridae): Cytogenetic study of a population exposed to agrochemical products
(Sociedade Brasileira de Genética, 2007-01-01)
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 ...