scholarly journals Y-chromosome evolution: emerging insights into processes of Y-chromosome degeneration

2013 ◽  
Vol 14 (2) ◽  
pp. 113-124 ◽  
Author(s):  
Doris Bachtrog
Keyword(s):  
Y Chromosome ◽  
Chromosome Evolution ◽  
Y Chromosome Evolution ◽  
Y Chromosome Degeneration

scholarly journals Gene-level, but not chromosome-wide, divergence between a very young house fly proto-Y chromosome and its homologous proto-X chromosome

2020 ◽  
Author(s):  
Jae Hak Son ◽  
Richard P. Meisel
Keyword(s):  
Gene Expression ◽  
Y Chromosome ◽  
Chromosome Evolution ◽  
Sex Chromosome ◽  
House Fly ◽  
Evolutionary Divergence ◽  
Y Chromosomes ◽  
Mitochondrial Functions ◽  
Xx Males ◽  
Y Chromosome Evolution

AbstractX and Y chromosomes are usually derived from a pair of homologous autosomes, which then diverge from each other over time. Although Y-specific features have been characterized in sex chromosomes of various ages, the earliest stages of Y chromosome evolution remain elusive. In particular, we do not know whether early stages of Y chromosome evolution consist of changes to individual genes or happen via chromosome-scale divergence from the X. To address this question, we quantified divergence between young proto-X and proto-Y chromosomes in the house fly, Musca domestica. We compared proto-sex chromosome sequence and gene expression between genotypic (XY) and sex-reversed (XX) males. We find evidence for sequence divergence between genes on the proto-X and proto-Y, including five genes with mitochondrial functions. There is also an excess of genes with divergent expression between the proto-X and proto-Y, but the number of genes is small. This suggests that individual proto-Y genes, but not the entire proto-Y chromosome, have diverged from the proto-X. We identified one gene, encoding an axonemal dynein assembly factor (which functions in sperm motility), that has higher expression in XY males than XX males because of a disproportionate contribution of the proto-Y allele to gene expression. The up-regulation of the proto-Y allele may be favored in males because of this gene’s function in spermatogenesis. The evolutionary divergence between proto-X and proto-Y copies of this gene, as well as the mitochondrial genes, is consistent with selection in males affecting the evolution of individual genes during early Y chromosome evolution.

scholarly journals Shared and Species-Specific Patterns of Nascent Y Chromosome Evolution in Two Guppy Species

Genes ◽  
2018 ◽  
Vol 9 (5) ◽  
pp. 238 ◽  
Author(s):  
Jake Morris ◽  
Iulia Darolti ◽  
Natasha Bloch ◽  
Alison Wright ◽  
Judith Mank
Keyword(s):  
Y Chromosome ◽  
Chromosome Evolution ◽  
Y Chromosome Evolution ◽  
Species Specific

Molecular characterization of a mouse Y chromosomal repetitive sequence amplified in distantly related species in the genus Mus

Genome ◽  
1993 ◽  
Vol 36 (3) ◽  
pp. 588-593 ◽  
Author(s):  
Yutaka Nishioka ◽  
Becky M. Dolan ◽  
Laila Zahed
Keyword(s):  
Y Chromosome ◽  
Repetitive Sequence ◽  
Chromosome Evolution ◽  
Fragment Length Polymorphism ◽  
Gc Content ◽  
Y Chromosomes ◽  
Mouse Species ◽  
Y Chromosome Evolution

This report describes a 1.1 kb long mouse Y chromosomal sequence designated 142-4. It has a 42% GC content and is rich in short direct and inverted repeats. 142-4 related sequences are repeated about 200 times in the Mus musculus Y chromosome and their distribution was visualized by in situ hybridization. 142-4 detected a restriction fragment length polymorphism that differentiated between the M. m. musculus type and the M. m. domesticus type Y chromosome. Southern blot analysis of DNAs isolated from a panel of mouse species showed that 142-4 related sequences were amplified in the Y chromosomes of M. minutoides, M. musculus, M. saxicola, M. spicilegus, and M. spretus but not in those of M. caroli, M. cookii, and M. pahari. These results suggest that 142-4 related sequences are evolutionary unstable and their accumulation patterns do not correlate with the known phylogenetic relationships of mouse species in the genus Mus.Key words: mouse Y chromosome, repetitive sequence, Mus, sequence amplification, Y chromosome evolution.

Mitochondrial mutations may drive Y chromosome evolution

BioEssays ◽  
2002 ◽  
Vol 24 (3) ◽  
pp. 275-279 ◽  
Author(s):  
Neil J. Gemmell ◽  
Frank Y. T. Sin
Keyword(s):  
Y Chromosome ◽  
Chromosome Evolution ◽  
Mitochondrial Mutations ◽  
Y Chromosome Evolution
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