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Article ; Online: Distinct classical and molecular cytogenetics of Astyanax marionae and A. fasciatus (Characiformes: Characidae): a comparative study of the organization of heterochromatin and repetitive genes.

Piscor, Diovani / Centofante, Liano / Parise-Maltempi, Patricia Pasquali

2017 Volume 96, Issue 4, Page(s) 665–671

Abstract: Genus Astyanax is well distributed in Neotropical freshwater environments and its taxonomic position is uncertain, as is the case with other Characidae genera allocated in the group incertae sedis. This study aimed to analyse the karyotype of different ... ...

Abstract	Genus Astyanax is well distributed in Neotropical freshwater environments and its taxonomic position is uncertain, as is the case with other Characidae genera allocated in the group incertae sedis. This study aimed to analyse the karyotype of different populations of Astyanax fasciatus (Corumbataí River basin) using Giemsa staining, C-band technique, and fluorescence in situ hybridization for the H3 histone and 5S rRNA genes, in addition we describe for the first time the chromosomal organization of H3 histone and 5S rRNAgenes in A. marionae (ParaguayRiver basin). Chromosomes of three A. fasciatus populations were analysed (two with 2n = 50 and one with 2n = 48) and the heterochromatin was organized in two forms (blocks with blurred boundaries and distinct blocks). H3 histone and 5S rRNA genes were observed in all the three populations of A. fasciatus on two chromosome pairs (one metacentric chromosome showing H3 histone and 5S rRNA gene clusters). In A. marionae (2n = 48), H3 histone and 5S rRNA genes were observed in one acrocentric chromosome pair (different pairs). Further, differences between karyotypes and heterochromatin, as well as the chromosomal organization of H3 histone and 5S rRNA genes in Astyanax species, focussing on chromosome evolution in the group are discussed.
MeSH term(s)	Animals ; Characiformes/classification ; Characiformes/genetics ; Chromosome Banding ; Genes ; Heterochromatin/genetics ; Histones/genetics ; Karyotyping ; Phylogeny ; Phylogeography ; RNA, Ribosomal, 5S/genetics ; Repetitive Sequences, Nucleic Acid
Chemical Substances	Heterochromatin ; Histones ; RNA, Ribosomal, 5S
Language	English
Publishing date	2017-09-14
Publishing country	India
Document type	Journal Article
ZDB-ID	3039-9
ISSN	0973-7731 ; 0958-8361 ; 0022-1333
ISSN (online)	0973-7731
ISSN	0958-8361 ; 0022-1333
DOI	10.1007/s12041-017-0813-8
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Article: Distinct classical and molecular cytogenetics of Astyanax marionae and A. fasciatus (Characiformes: Characidae): a comparative study of the organization of heterochromatin and repetitive genes

Piscor, Diovani / Liano Centofante / Patricia Pasquali Parise-Maltempi

Journal of genetics. 2017 Sept., v. 96, no. 4

2017

Abstract	Genus Astyanax is well distributed in Neotropical freshwater environments and its taxonomic position is uncertain, as is the case with other Characidae genera allocated in the group incertae sedis. This study aimed to analyse the karyotype of different populations of Astyanax fasciatus (CorumbataÃ River basin) using Giemsa staining, C-band technique, and fluorescence in situ hybridization for the H3 histone and 5S rRNA genes, in addition we describe for the first time the chromosomal organization of H3 histone and 5S rRNA genes in A. marionae (Paraguay River basin). Chromosomes of three A. fasciatus populations were analysed (two with [Formula: see text] and one with [Formula: see text]) and the heterochromatin was organized in two forms (blocks with blurred boundaries and distinct blocks). H3 histone and 5S rRNA genes were observed in all the three populations of A. fasciatus on two chromosome pairs (one metacentric chromosome showing H3 histone and 5S rRNA gene clusters). In A. marionae ([Formula: see text]), H3 histone and 5S rRNA genes were observed in one acrocentric chromosome pair (different pairs). Further, differences between karyotypes and heterochromatin, as well as the chromosomal organization of H3 histone and 5S rRNA genes in Astyanax species, focussing on chromosome evolution in the group are discussed.
Keywords	Astyanax fasciatus ; Neotropics ; acrocentric chromosomes ; evolution ; fluorescence in situ hybridization ; freshwater ; heterochromatin ; histones ; karyotyping ; metacentric chromosomes ; multigene family ; ribosomal RNA ; staining ; watersheds ; Paraguay River
Language	English
Dates of publication	2017-09
Size	p. 665-671.
Publishing place	Springer India
Document type	Article
ZDB-ID	3039-9
ISSN	0973-7731 ; 0958-8361 ; 0022-1333
ISSN (online)	0973-7731
ISSN	0958-8361 ; 0022-1333
DOI	10.1007/s12041-017-0813-8
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Article ; Online: Chromosomal Diversity in Two Allopatric Populations of

Fernandes, Carlos Alexandre / Paiz, Leonardo Marcel / Piscor, Diovani / Gavazzoni, Mariane / Carvalho, Luciana Andreia Borin de / Portela-Castro, Ana Luiza de Brito / Margarido, Vladimir Pavan

Zebrafish

2021 Volume 18, Issue 1, Page(s) 66–72

Abstract: ... ...

Abstract	Farlowella
MeSH term(s)	Animal Distribution ; Animals ; Catfishes/genetics ; Chromosomes ; Cytochromes b/analysis ; Cytogenetic Analysis/veterinary ; Female ; Fish Proteins/analysis ; Genetic Variation ; Male
Chemical Substances	Fish Proteins ; Cytochromes b (9035-37-4)
Language	English
Publishing date	2021-02-03
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2156020-1
ISSN	1557-8542 ; 1545-8547
ISSN (online)	1557-8542
ISSN	1545-8547
DOI	10.1089/zeb.2020.1966
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Article ; Online: Highly Similar Morphologies Between Chromosomes Bearing U2 snRNA Gene Clusters in the Group Astyanax Baird and Girard, 1854 (Characiformes, Characidae): An Evolutionary Approach in Species with 2n = 36, 46, 48, and 50.

Piscor, Diovani / Centofante, Liano / Parise-Maltempi, Patricia Pasquali

Zebrafish

2016 Volume 13, Issue 6, Page(s) 565–570

Abstract: Repetitive sequences and their chromosomal locations have been widely studied in species of the Astyanax genus. However, the chromosomal organization of U2 snDNA remains largely unknown. The aims of this study were to examine the chromosomal contexts of ... ...

Abstract	Repetitive sequences and their chromosomal locations have been widely studied in species of the Astyanax genus. However, the chromosomal organization of U2 snDNA remains largely unknown. The aims of this study were to examine the chromosomal contexts of U2 snRNA and 5S rRNA genes in Astyanax species and determine the degree of chromosome morphological similarity between species with different diploid numbers. Clusters of U2 snDNA and 5S rDNA were determined in nine species of Astyanax, including two karyomorphs of Astyanax fasciatus Cuvier, 1819. All species exhibited U2 snDNA clusters on two chromosome pairs, except Astyanax mexicanus De Filippi, 1853 (one pair). The 5S rDNA clusters were located on one chromosome pair in Astyanax altiparanae Garutti and Britski, 2000, and Astyanax marionae Eigenmann, 1911, two pairs in Astyanax abramis Jenyns, 1842, Astyanax asuncionensis Géry, 1972, Astyanax bockmanni Vari and Castro, 2007, Astyanax eigenmanniorum Cope, 1894, A. fasciatus (karyomorphs I and II), and Astyanax schubarti Britski, 1964, and four pairs in A. mexicanus. The relationships between the repetitive sequences in different species suggest that A. schubarti and A. mexicanus exhibit an unusual U2 snDNA chromosomal format as a result of events occurring in the evolutionary history of the Astyanax group.
MeSH term(s)	Animals ; Biological Evolution ; Brazil ; Characidae/genetics ; Karyotype ; Multigene Family ; RNA, Ribosomal, 5S/genetics ; RNA, Small Nuclear/genetics ; Repetitive Sequences, Nucleic Acid
Chemical Substances	RNA, Ribosomal, 5S ; RNA, Small Nuclear ; U2 small nuclear RNA
Language	English
Publishing date	2016-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	2156020-1
ISSN	1557-8542 ; 1545-8547
ISSN (online)	1557-8542
ISSN	1545-8547
DOI	10.1089/zeb.2016.1292
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Article ; Online: Microsatellite Organization in the B Chromosome and A Chromosome Complement in Astyanax (Characiformes, Characidae) Species.

Piscor, Diovani / Parise-Maltempi, Patricia P

Cytogenetic and genome research

2016 Volume 148, Issue 1, Page(s) 44–51

Abstract: The organization of microsatellites in B and sex chromosomes has been linked to chromosomal evolution in a number of animal groups. Here, the chromosomal organizations of (CA)15, (GA)15, (CG)15, (GACA)4, and (GATA)8 microsatellites were examined in ... ...

Abstract	The organization of microsatellites in B and sex chromosomes has been linked to chromosomal evolution in a number of animal groups. Here, the chromosomal organizations of (CA)15, (GA)15, (CG)15, (GACA)4, and (GATA)8 microsatellites were examined in several Astyanax species with different diploid numbers: Astyanax mexicanus (2n = 50 + 1 B chromosome), A. altiparanae (2n = 50), A. marionae (2n = 48), A. fasciatus (2n = 46), and A. schubarti (2n = 36). The (CA)15 and (GA)15 microsatellites were dispersed across the chromosomes of A. altiparanae and A. fasciatus but were also observed as clusters (CA and GA for A. altiparanae, and CA for A. fasciatus). In A. marionae and A. schubarti, the (CA)15 and (GA)15 microsatellites were dispersed but were also observed as clustered signals and coincident with heterochromatic regions. In all 4 of these species, the (CG)15 and (GACA)4 microsatellites were dispersed across chromosomes, and the (GATA)8 microsatellite was co-localized with 5S rDNA. In A. mexicanus, the (CA)15, (GA)15, (CG)15, (GATA)8, and (GACA)4 microsatellites were weakly detected and dispersed across the chromosomes of the A complement. On the B chromosome, signals for the different microsatellites were weak, strong, absent, weak, and absent, respectively. The distribution of microsatellites and the locational relationship between microsatellites and 5S rDNA are discussed, and a possible evolutionary pathway is proposed for microsatellites in Astyanax.
MeSH term(s)	Animals ; Characidae/classification ; Characidae/genetics ; Chromosome Banding ; Chromosome Mapping ; Chromosomes/genetics ; DNA, Ribosomal/genetics ; Diploidy ; Evolution, Molecular ; Heterochromatin/genetics ; In Situ Hybridization, Fluorescence ; Microsatellite Repeats/genetics ; RNA, Ribosomal, 5S/genetics
Chemical Substances	DNA, Ribosomal ; Heterochromatin ; RNA, Ribosomal, 5S
Language	English
Publishing date	2016
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2087824-2
ISSN	1424-859X ; 1424-8581
ISSN (online)	1424-859X
ISSN	1424-8581
DOI	10.1159/000444728
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Article ; Online: Chromosomal mapping of H3 histone and 5S rRNA genes in eight species of Astyanax (Pisces, Characiformes) with different diploid numbers: syntenic conservation of repetitive genes.

Piscor, Diovani / Parise-Maltempi, Patricia Pasquali

Genome

2016 Volume 59, Issue 3, Page(s) 167–172

Abstract: The genus Astyanax is widely distributed from the southern United States to northern Patagonia, Argentina. While cytogenetic studies have been performed for this genus, little is known about the histone gene families. The aim of this study was to examine ...

Abstract	The genus Astyanax is widely distributed from the southern United States to northern Patagonia, Argentina. While cytogenetic studies have been performed for this genus, little is known about the histone gene families. The aim of this study was to examine the chromosomal relationships among the different species of Astyanax. The chromosomal locations of the 5S rRNA and H3 histone genes were determined in A. abramis, A. asuncionensis, A. altiparanae, A. bockmanni, A. eigenmanniorum, A. mexicanus (all 2n = 50), A. fasciatus (2n = 46), and A. schubarti (2n = 36). All eight species exhibited H3 histone clusters on two chromosome pairs. In six species (A. abramis, A. asuncionensis, A. altiparanae, A. bockmanni, A. eigenmanniorum, and A. fasciatus), syntenic clusters of H3 histone and 5S rDNA were observed on metacentric (m) or submetacentric (sm) chromosomes. In seven species, clusters of 5S rDNA sequences were located on one or two chromosome pairs. In A. mexicanus, 5S rDNA clusters were located on four chromosome pairs. This study demonstrates that H3 histone clusters are conserved on two chromosome pairs in the genus Astyanax, and specific chromosomal features may contribute to the genomic organization of the H3 histone and 5S rRNA genes.
MeSH term(s)	Animals ; Characiformes/classification ; Characiformes/genetics ; Chromosome Mapping ; Diploidy ; Genes, rRNA ; Histones/genetics ; In Situ Hybridization, Fluorescence ; Karyotype ; RNA, Ribosomal, 5S/genetics ; Synteny
Chemical Substances	Histones ; RNA, Ribosomal, 5S
Language	English
Publishing date	2016-03
Publishing country	Canada
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	639031-6
ISSN	1480-3321 ; 0831-2796
ISSN (online)	1480-3321
ISSN	0831-2796
DOI	10.1139/gen-2015-0112
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Article: First description of B chromosomes in the Hyphessobrycon (Characiformes, Characidae) genus: a hypothesis for the extra element of Hyphessobryconeques Steindachner, 1882.

Piscor, Diovani / Parise-Maltempi, Patricia Pasquali

Comparative cytogenetics

2015 Volume 9, Issue 3, Page(s) 325–333

Abstract: The Hyphessobrycon are allocated in the incertae sedis group of the Characidae family, one of the genera with more species of the group. The chromosomes of some species of Hyphessobrycon are known, and the diploid number most common for genus is 2n = 50 ... ...

Abstract	The Hyphessobrycon are allocated in the incertae sedis group of the Characidae family, one of the genera with more species of the group. The chromosomes of some species of Hyphessobrycon are known, and the diploid number most common for genus is 2n = 50 chromosomes. The aims of this study were to examine the karyotype macrostructure in the Hyphessobryconeques Steindachner, 1882, and show a new origin hypothesis for B chromosomes. The diploid number observed for Hyphessobryconeques was 2n = 52 chromosomes, and a karyotype formulae of 12m + 18sm + 8st + 14a, with FN (fundamental number) = 90 for both sexes. Only two females showed one B chromosome. The heterochromatin was observed mainly on centromeric regions, and in the long arm of the B chromosome. In this paper, the relationship of the B chromosome of Hyphessobryconeques with an occasional chromosome rearrangement was discussed.
Language	English
Publishing date	2015-07-03
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2572457-5
ISSN	1993-078X ; 1993-0771
ISSN (online)	1993-078X
ISSN	1993-0771
DOI	10.3897/CompCytogen.v9i3.5224
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Article ; Online: Chromosomal microstructure diversity in three Astyanax (Characiformes, Characidae) species: comparative analysis of the chromosomal locations of the 18S and 5S rDNAs.

Piscor, Diovani / Alves, Anderson Luís / Parise-Maltempi, Patricia Pasquali

Zebrafish

2015 Volume 12, Issue 1, Page(s) 81–90

Abstract: The species of genus Astyanax is widely distributed in freshwater neotropical zones. Astyanax is considered to be taxonomically confused, similar to other genera placed incertae sedis in Characidae. The cytogenetics of this genus is well characterized; ... ...

Abstract	The species of genus Astyanax is widely distributed in freshwater neotropical zones. Astyanax is considered to be taxonomically confused, similar to other genera placed incertae sedis in Characidae. The cytogenetics of this genus is well characterized; species vary widely in diploid number, from 2n=36 chromosomes in Astyanax schubarti to 2n=50 for most species studied. The size, number, and position of different cytological markers vary among species and populations of Astyanax. We analyzed the karyotypes of individuals from three Astyanax species (Astyanax abramis, Astyanax altiparanae, and Astyanax eigenmanniorum) from populations not previously analyzed. We describe variations in several cytogenetic markers and the karyotypic relationships between them, specifically focusing on the characteristics of the conserved and divergent locations of the ribosomal genes. Our data are useful for establishing relationships between species and for investigating the karyotype evolution within the genus.
MeSH term(s)	Animals ; Brazil ; Characidae/genetics ; Chromosome Mapping ; Chromosomes/genetics ; Evolution, Molecular ; Female ; Genetic Variation ; Karyotype ; Male ; RNA, Ribosomal, 18S/genetics ; RNA, Ribosomal, 5S/genetics ; Species Specificity
Chemical Substances	RNA, Ribosomal, 18S ; RNA, Ribosomal, 5S
Language	English
Publishing date	2015-02
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2156020-1
ISSN	1557-8542 ; 1545-8547
ISSN (online)	1557-8542
ISSN	1545-8547
DOI	10.1089/zeb.2014.1036
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Article: First description of B chromosomes in the Hyphessobrycon (Characiformes, Characidae) genus: a hypothesis for the extra element of Hyphessobrycon eques Steindachner, 1882

Piscor, Diovani / Parise-Maltempi, Patricia Pasquali

Comparative cytogenetics. 2015 July 3, v. 9, no. 3

2015

Abstract	The Hyphessobrycon are allocated in the incertae sedis group of the Characidae family, one of the genera with more species of the group. The chromosomes of some species of Hyphessobrycon are known, and the diploid number most common for genus is 2n = 50 chromosomes. The aims of this study were to examine the karyotype macrostructure in the Hyphessobrycon eques Steindachner, 1882, and show a new origin hypothesis for B chromosomes. The diploid number observed for Hyphessobrycon eques was 2n = 52 chromosomes, and a karyotype formulae of 12m + 18sm + 8st + 14a, with FN (fundamental number) = 90 for both sexes. Only two females showed one B chromosome. The heterochromatin was observed mainly on centromeric regions, and in the long arm of the B chromosome. In this paper, the relationship of the B chromosome of Hyphessobrycon eques with an occasional chromosome rearrangement was discussed.
Keywords	Hyphessobrycon eques ; chromosome aberrations ; diploidy ; heterochromatin ; karyotyping
Language	English
Dates of publication	2015-0703
Size	p. 325-333.
Publishing place	Pensoft Publishers
Document type	Article
ZDB-ID	2572457-5
ISSN	1993-078X ; 1993-0771
ISSN (online)	1993-078X
ISSN	1993-0771
DOI	10.3897/CompCytogen.v9i3.5224
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Article ; Online: Chromosomal mapping of repetitive sequences in Hyphessobrycon eques (Characiformes, Characidae): a special case of the spreading of 5S rDNA clusters in a genome.

Piscor, Diovani / Paiz, Leonardo Marcel / Baumgärtner, Lucas / Cerqueira, Fiorindo José / Fernandes, Carlos Alexandre / Lui, Roberto Laridondo / Parise-Maltempi, Patricia Pasquali / Margarido, Vladimir Pavan

Genetica

2020 Volume 148, Issue 1, Page(s) 25–32

Abstract: Cytogenetic data showed a variation in diploid chromosome number in the genus Hyphessobrycon ranging from 2n = 46 to 52, and studies involving repetitive DNA sequences are scarce in representatives of this genus. The purpose of this paper was the ... ...

Abstract	Cytogenetic data showed a variation in diploid chromosome number in the genus Hyphessobrycon ranging from 2n = 46 to 52, and studies involving repetitive DNA sequences are scarce in representatives of this genus. The purpose of this paper was the chromosomal mapping of repetitive sequences (rDNA, histone genes, U snDNA and microsatellites) and investigation of the amplification of 5S rDNA clusters in the Hyphessobrycon eques genome. Two H. eques populations displayed 2n = 52 chromosomes, with the acrocentric pair No. 24 bearing Ag-NORs corresponding with CMA
MeSH term(s)	Animals ; Characidae/genetics ; Characiformes/genetics ; Chromosome Mapping/methods ; Chromosomes ; DNA, Ribosomal/genetics ; Diploidy ; Female ; Genome/genetics ; In Situ Hybridization, Fluorescence/methods ; Karyotyping ; Male ; Microsatellite Repeats ; RNA, Ribosomal, 18S/genetics ; RNA, Ribosomal, 5S/genetics ; Repetitive Sequences, Nucleic Acid/genetics ; Species Specificity
Chemical Substances	DNA, Ribosomal ; RNA, Ribosomal, 18S ; RNA, Ribosomal, 5S
Language	English
Publishing date	2020-01-29
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	2165-9
ISSN	1573-6857 ; 0016-6707
ISSN (online)	1573-6857
ISSN	0016-6707
DOI	10.1007/s10709-020-00086-3
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