Cytogenetic characterization and description of an XX/XY1Y2 sex chromosome system in catfish Harttia carvalhoi (Siluriformes, Loricariidae)

2006 ◽  
Vol 112 (3-4) ◽  
pp. 320-324 ◽  
Author(s):  
L. Centofante ◽  
L.A.C. Bertollo ◽  
O. Moreira-Filho
Keyword(s):  
Sex Chromosome ◽  
Cytogenetic Characterization ◽  
Sex Chromosome System

A new multiple sex chromosome system X1X1X2X2/X1Y1X2Y2 in Siluriformes: cytogenetic characterization of Bunocephalus coracoideus (Aspredinidae)

Genetica ◽  
2016 ◽  
Vol 144 (5) ◽  
pp. 591-599 ◽  
Author(s):  
Milena Ferreira ◽  
Caroline Garcia ◽  
Daniele Aparecida Matoso ◽  
Isac Silva de Jesus ◽  
Eliana Feldberg
Keyword(s):  
Sex Chromosome ◽  
Cytogenetic Characterization ◽  
Sex Chromosome System

Cytogenetic characterization and description of an X1X1X2X2/X1X2Y sex chromosome system in Collichthys lucidus (Richardson, 1844)

2018 ◽  
Vol 37 (4) ◽  
pp. 34-39 ◽  
Author(s):  
Shoukang Zhang ◽  
Jiao Zheng ◽  
Jing Zhang ◽  
Zhiyong Wang ◽  
Yilei Wang ◽  
...  
Keyword(s):  
Sex Chromosome ◽  
Cytogenetic Characterization ◽  
Sex Chromosome System ◽  
Collichthys Lucidus

Molecular cytogenetic characterization of Rumex papillaris, a dioecious plant with an XX/XY1Y2 sex chromosome system

Genetica ◽  
2008 ◽  
Vol 135 (1) ◽  
pp. 87-93 ◽  
Author(s):  
Rafael Navajas-Pérez ◽  
Trude Schwarzacher ◽  
Manuel Ruiz Rejón ◽  
Manuel A. Garrido-Ramos
Keyword(s):  
Sex Chromosome ◽  
Dioecious Plant ◽  
Molecular Cytogenetic ◽  
Cytogenetic Characterization ◽  
Sex Chromosome System

Cytogenetic Characterization of Brown Howler Monkeys, Alouatta guariba clamitans (Atelidae, Platyrrhini): Meiotic Confirmation of an X1X1X2X2X3X3/X1X2X3Y1Y2 Sex Chromosome System

2017 ◽  
Vol 151 (3) ◽  
pp. 131-140 ◽  
Author(s):  
Eliana R. Steinberg ◽  
Vanessa B. Fortes ◽  
Luis F. Rossi ◽  
Laurete Murer ◽  
Maristela Lovato ◽  
...  
Keyword(s):  
Sex Chromosome ◽  
Howler Monkeys ◽  
In Captivity ◽  
In The Wild ◽  
Cytogenetic Characterization ◽  
Clear Identification ◽  
Sex Chromosome System ◽  
Alouatta Guariba Clamitans ◽  
Meiotic Analyses ◽  
South Of Brazil

For brown howler monkeys (Alouatta guariba clamitans), diploid chromosome numbers varying from 2n = 45 to 2n = 52, with XX/XY, X1X1X2X2/X1X2Y, and X1X1X2X2X3X3/X1X2X3Y1Y2 sex chromosome systems have been described by mitotic studies but still await confirmation by meiotic analyses. We analyzed 3 male individuals sampled in the wild (in the municipality of Santa Maria, RS, Brazil) as well as 1 male and 1 female individual in captivity at the São Braz breeding center. Peripheral blood samples and testicular biopsies were taken. We found different diploid numbers for both sexes in somatic cells, 2n = 45,X1X2X3Y1Y2 in males and 2n = 46,X1X1X2X2X3X3 in females, with 4 metacentric (9-12), 7 submetacentric (1-6, 8), and 9 acrocentric autosomal chromosome pairs (13-20, 22). X1 and X2 were submetacentric chromosomes, while X3, Y1, and Y2 were acrocentric ones. Spermatocyte microspreads were examined for synaptonemal complexes. Pachytene spermatocyte analysis was done to verify the chromosome number and morphologies observed in mitotic karyotypes. Immunodetection was performed using anti-SMC3 and anti-CREST antibodies. The presence of a sex chromosome pentavalent X1X2X3Y1Y2 in the males was confirmed by C-banding in metaphase I and by immunodetection in prophase I by the clear identification of 5 centromeres. The G-banded karyotype corresponded to that previously described for A. g. clamitans in the south of Brazil (Curitiba, Parana State, and Blumenau, Santa Catarina State) and for the Misiones Province, Argentina.

scholarly journals Evolution of a Multiple Sex-Chromosome System by Three-Sequential Translocations among Potential Sex-Chromosomes in the Taiwanese Frog Odorrana swinhoana

Cells ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 661
Author(s):  
Ikuo Miura ◽  
Foyez Shams ◽  
Si-Min Lin ◽  
Marcelo de Bello Cioffi ◽  
Thomas Liehr ◽  
...  
Keyword(s):  
Sex Chromosomes ◽  
Rare Case ◽  
Sex Chromosome ◽  
Sex Chromosome System ◽  
Brown Frog ◽  
Male Specific

Translocation between sex-chromosomes and autosomes generates multiple sex-chromosome systems. It happens unexpectedly, and therefore, the evolutionary meaning is not clear. The current study shows a multiple sex chromosome system comprising three different chromosome pairs in a Taiwanese brown frog (Odorrana swinhoana). The male-specific three translocations created a system of six sex-chromosomes, ♂X1Y1X2Y2X3Y3 -♀X1X1X2X2X3X3. It is unique in that the translocations occurred among three out of the six members of potential sex-determining chromosomes, which are known to be involved in sex-chromosome turnover in frogs, and the two out of three include orthologs of the sex-determining genes in mammals, birds and fishes. This rare case suggests sex-specific, nonrandom translocations and thus provides a new viewpoint for the evolutionary meaning of the multiple sex chromosome system.

scholarly journals Karyotype description of three species of Loricariidae (Siluriformes) and occurrence of the ZZ/ZW sexual system in Hemiancistrus spilomma Cardoso & Lucinda, 2003

2006 ◽  
Vol 4 (1) ◽  
pp. 93-97 ◽  
Author(s):  
Renildo Ribeiro de Oliveira ◽  
Issakar Lima Souza ◽  
Paulo Cesar Venere
Keyword(s):  
Chromosome Pair ◽  
Sex Chromosome ◽  
Sexual System ◽  
Freshwater Systems ◽  
Phylogenetic Studies ◽  
Cytogenetic Data ◽  
Sex Chromosome System

The neotropical freshwater systems have a high number of catfish species (Siluriformes), and many of those are denominated "cascudos" in Brazil. Cytogenetic data about three "cascudos" species fished in the rio Araguaia are described in the present study. The Pterygoplichthys joselimaianus showed 2n=52, with 28 metacentrics (M) chromosomes, 16 submetacentrics (SM) and 8 subtelocentrics/acrocentrics (ST/A) in both sexes. Hemiancistrus spinosissimus showed 2n=52, with karyotype formulae 26M+22SM+4ST, in both sexes. Hemiancistrusspilomma also showed 2n=52, but in this species a ZZ/ZW sex chromosome system (25M+21SM+6ST in females and 24M+22SM+6ST in males) was observed. The cells from H. spinosissimus and P. joselimaianus showed one chromosome pair bearing Ag-NORs, while in the H. spilomma three chromosome pairs bearing Ag-NORs were detected. The data showed in this work reveal particular chromosomal characteristics, important for a good recognition of both Hemincistrus species, and also show the importance of the insertion of cytogenetic data on taxonomic phylogenetic studies.

scholarly journals Sex chromosome system ZZ/ZW in Apareiodon hasemani Eigenmann, 1916 (Characiformes, Parodontidae) and a derived chromosomal region

2012 ◽  
Vol 35 (4) ◽  
pp. 770-776 ◽  
Author(s):  
Elisangela Bellafronte ◽  
Michelle Orane Schemberger ◽  
Roberto Ferreira Artoni ◽  
Orlando Moreira Filho ◽  
Marcelo Ricardo Vicari
Keyword(s):  
Chromosomal Region ◽  
Sex Chromosome ◽  
Sex Chromosome System

scholarly journals A new species of the genus Rhaphidosoma Amyot et Serville, 1843 (Heteroptera, Reduviidae), with data on its chromosome complement

2021 ◽  
Vol 15 (4) ◽  
pp. 467-505
Author(s):  
Dmitry A. Gapon ◽  
Valentina G. Kuznetsova ◽  
Anna Maryańska-Nadachowska
Keyword(s):  
New Species ◽  
Fore Wing ◽  
Sex Chromosome ◽  
Complex Structure ◽  
Chromosome Complement ◽  
Morphological Description ◽  
Oriental Region ◽  
Western Asia ◽  
Sex Chromosome System ◽  
A New Species

A new species, Rhaphidosoma paganicumsp. nov. (Heteroptera: Reduviidae: Harpactorinae: Rhaphidosomatini), is described from the Dry Zone of Myanmar. It is the fifth species of Rhaphidosoma Amyot et Serville, 1843, known from the Oriental Region, and the first record of the genus for Myanmar and Indochina. The structure of the external and internal terminalia of the male and female is described and illustrated in detail. The completely inflated endosoma is described for the first time in reduviids. The complex structure of the ductus seminis is shown; it terminates with a voluminous seminal chamber which opens with a wide secondary gonopore and may be a place where spermatophores are formed. The new species is compared with all congeners from the Oriental Region and Western Asia. It is characterised by the absence of distinct tubercles on the abdominal tergites of the male, the presence only two long tubercles and small rounded ones on the abdominal tergites VII and VI, respectively, in the female, the presence of short fore wing vestiges which are completely hidden under longer fore wing vestiges, and other characters. In addition to the morphological description, an account is given of the male karyotype and the structure of testes of Rh. paganicumsp. nov. and another species of Harpactorinae, Polididus armatissimus Stål, 1859 (tribe Harpactorini). It was found that Rh. paganicumsp. nov. has a karyotype comprising 12 pairs of autosomes and a multiple sex chromosome system (2n♂=24A+X1X2X3Y), whereas P. armatissimus has a karyotype comprising five pairs of autosomes and a simple sex chromosome system (2n♂=10A+XY). The males of these species were found to have seven and nine follicles per testis, respectively. FISH mapping of 18S ribosomal DNA (major rDNA) revealed hybridisation signals on two of the four sex chromosomes (Y and one of the Xs) in Rh. paganicumsp. nov. and on the largest pair of autosomes in P. armatissimus. The presence of the canonical “insect” (TTAGG)n telomeric repeat was detected in the chromosomes of both species. This is the first application of FISH in the tribe Raphidosomatini and in the genus Polididus Stål, 1858.

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