Independent Sex Chromosome Evolution in Lower Vertebrates: A Molecular Cytogenetic Overview in the Erythrinidae Fish Family

2013 ◽  
Vol 141 (2-3) ◽  
pp. 186-194 ◽  
Author(s):  
M.B. Cioffi ◽  
T. Liehr ◽  
V. Trifonov ◽  
W.F. Molina ◽  
L.A.C. Bertollo
Keyword(s):  
Chromosome Evolution ◽  
Sex Chromosome ◽  
Sex Chromosome Evolution ◽  
Fish Family ◽  
Molecular Cytogenetic ◽  
Lower Vertebrates ◽  
Erythrinidae Fish

scholarly journals Chromosomal Analysis in Crotophaga ani (Aves, Cuculiformes) Reveals Extensive Genomic Reorganization and an Unusual Z-Autosome Robertsonian Translocation

Cells ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 4
Author(s):  
Rafael Kretschmer ◽  
Ricardo José Gunski ◽  
Analía del Valle Garnero ◽  
Thales Renato Ochotorena de Freitas ◽  
Gustavo Akira Toma ◽  
...  
Keyword(s):  
Robertsonian Translocation ◽  
Chromosome Evolution ◽  
Sex Chromosome ◽  
Rare Event ◽  
Chromosome Morphology ◽  
Z Chromosome ◽  
Molecular Cytogenetic ◽  
Intrachromosomal Rearrangements ◽  
Genomic Reorganization

Although cytogenetics studies in cuckoos (Aves, Cuculiformes) have demonstrated an interesting karyotype variation, such as variations in the chromosome morphology and diploid number, their chromosome organization and evolution, and relation with other birds are poorly understood. Hence, we combined conventional and molecular cytogenetic approaches to investigate chromosome homologies between chicken and the smooth-billed ani (Crotophaga ani). Our results demonstrate extensive chromosome reorganization in C. ani, with interchromosomal rearrangements involving macro and microchromosomes. Intrachromosomal rearrangements were observed in some macrochromosomes, including the Z chromosome. The most evolutionary notable finding was a Robertsonian translocation between the microchromosome 17 and the Z chromosome, a rare event in birds. Additionally, the simple short repeats (SSRs) tested here were preferentially accumulated in the microchromosomes and in the Z and W chromosomes, showing no relationship with the constitutive heterochromatin regions, except in the W chromosome. Taken together, our results suggest that the avian sex chromosome is more complex than previously postulated and revealed the role of microchromosomes in the avian sex chromosome evolution, especially cuckoos.

scholarly journals Sex and the flower – developmental aspects of sex chromosome evolution

2018 ◽  
Vol 122 (7) ◽  
pp. 1085-1101 ◽  
Author(s):  
Roman Hobza ◽  
Vojtech Hudzieczek ◽  
Zdenek Kubat ◽  
Radim Cegan ◽  
Boris Vyskot ◽  
...  
Keyword(s):  
Chromosome Evolution ◽  
Sex Chromosome ◽  
Sex Chromosome Evolution

scholarly journals Sex chromosome evolution in parasitic nematodes of humans

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jeremy M. Foster ◽  
Alexandra Grote ◽  
John Mattick ◽  
Alan Tracey ◽  
Yu-Chih Tsai ◽  
...  
Keyword(s):  
Chromosome Evolution ◽  
Sex Chromosome ◽  
Parasitic Nematodes ◽  
Sex Chromosome Evolution
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