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Sexual selection drives evolution and rapid turnover of male gene expression
- P. W. Harrison, A. Wright, J. Mank
- Biology, PsychologyProceedings of the National Academy of Sciences
- 23 March 2015
Using a phylogenetically controlled analysis of birds that exhibit diverse levels of sexual selection, a rapid turnover in sex-biased gene expression is shown primarily through evolution of male expression levels and it is shown that the degree ofSexual selection predicts the proportion of male-biased genes but does not account for rates of coding sequence evolution.
The shared genome is a pervasive constraint on the evolution of sex-biased gene expression.
- R. Griffin, R. Dean, J. L. Grace, P. Rydén, U. Friberg
- BiologyMolecular biology and evolution
- 1 September 2013
The results show that a shared genome constrains both short- and long-term evolution of sexual dimorphism, and that genes currently exposed to sexually antagonistic selection have a higher average rMF than other genes.
How to make a sex chromosome
This review considers each of these three questions in turn to address fundamental questions in the field, summarize the current understanding, and highlight important areas for future work.
How to identify sex chromosomes and their turnover
The available bioinformatic approaches are synthesized to produce a guide for characterizing sex chromosome system and identity simultaneously across clades of organisms, and the current understanding of the processes driving sex chromosome turnover is surveyed.
The Potential Role of Sexual Conflict and Sexual Selection in Shaping the Genomic Distribution of Mito-nuclear Genes
This work developed the idea to test coadaptation and conflict between mito-nuclear gene combinations across phylogenetically independent sex chromosomes on a far broader scale and found that, in addition to therian mammals, only Caenorhabditis elegans showed an under-representation of mite-nuclear genes on the sex chromosomes.
Positive Selection Underlies Faster-Z Evolution of Gene Expression in Birds
- R. Dean, P. W. Harrison, A. Wright, Fabian Zimmer, J. Mank
- BiologyMolecular biology and evolution
- 10 June 2015
The results indicate that Fast-Z evolution of gene expression is the product of positive selection acting on recessive beneficial alleles in the heterogametic sex, and suggests that the adaptive potential of Z chromosome gene expression may be much greater than that of gene sequence.
The role of sex chromosomes in sexual dimorphism: discordance between molecular and phenotypic data
This article examines molecular and phenotypic data in the light of theoretical predictions about masculinization and feminization of the sex chromosomes, and discusses the role of genetic and regulatory complexities in the genome–phenotype relationship, and ultimately how these affect the overall role of thesex chromosomes in sex differences.
Quantitative Proteomics Identification of Seminal Fluid Proteins in Male Drosophila melanogaster*
This work applied label-free quantitative proteomics to Drosophila melanogaster, male reproductive tissue and quantified Sfps before and immediately after mating, to infer those transferred during mating, and identified nine high-confidence novel candidate Sfps.
Tissue Specificity and Sex-Specific Regulatory Variation Permit the Evolution of Sex-Biased Gene Expression
The results suggest that genetic correlations between males and females may be less important in constraining the evolution of sex-biased gene expression than pleiotropy, and sex-specific regulatory variation and tissue specificity may resolve the paradox of widespread sex bias within a largely shared genome.
Mito-nuclear interactions as drivers of gene movement on and off the X-chromosome
The results are consistent with the SC hypothesis, suggesting that mitochondrial mutational pressure selects for gene movement off-the-X, hence enabling mito-nuclear coadaptation to proceed along trajectories that result in optimized fitness in both sexes.