The X chromosome favors males under sexually antagonistic selection

Evolution ◽  
2018 ◽  
Vol 73 (1) ◽  
pp. 84-91 ◽  
Author(s):  
Manus M. Patten
Keyword(s):  
X Chromosome ◽  
Antagonistic Selection ◽  
Sexually Antagonistic Selection

LIVE FAST, DIE YOUNG: TRADE-OFFS BETWEEN FITNESS COMPONENTS AND SEXUALLY ANTAGONISTIC SELECTION ON WEAPONRY IN SOAY SHEEP

Evolution ◽  
2006 ◽  
Vol 60 (10) ◽  
pp. 2168-2181 ◽  
Author(s):  
Matthew R. Robinson ◽  
Jill G. Pilkington ◽  
Tim H. Clutton-Brock ◽  
Josephine M. Pemberton ◽  
Loeske E.B. Kruuk
Keyword(s):  
Fitness Components ◽  
Antagonistic Selection ◽  
Soay Sheep ◽  
Trade Offs ◽  
Sexually Antagonistic Selection

scholarly journals Maintenance costs of male dominance and sexually antagonistic selection in the wild

2018 ◽  
Vol 32 (12) ◽  
pp. 2678-2688 ◽  
Author(s):  
Zbyszek Boratyński ◽  
Esa Koskela ◽  
Tapio Mappes ◽  
Suzanne C. Mills ◽  
Mikael Mokkonen
Keyword(s):  
Male Dominance ◽  
Maintenance Costs ◽  
Antagonistic Selection ◽  
In The Wild ◽  
Sexually Antagonistic Selection

Widespread intersex differentiation across the stickleback genome – The signature of sexually antagonistic selection?

2019 ◽  
Vol 29 (2) ◽  
pp. 262-271 ◽  
Author(s):  
Mirjam Bissegger ◽  
Telma G. Laurentino ◽  
Marius Roesti ◽  
Daniel Berner
Keyword(s):  
Antagonistic Selection ◽  
Sexually Antagonistic Selection ◽  
Stickleback Genome

scholarly journals Establishment of a new sex-determining allele driven by sexually antagonistic selection

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Takahiro Sakamoto ◽  
Hideki Innan
Keyword(s):  
Genetic Drift ◽  
Balancing Selection ◽  
Theoretical Description ◽  
Random Genetic Drift ◽  
Antagonistic Selection ◽  
Entire Process ◽  
Turnover Process ◽  
Sexually Antagonistic Selection ◽  
Two Phases ◽  
Theoretical Results

Abstract The turnover of sex-determining loci has repeatedly occurred in a number of species, rather than having a diverged pair of sex chromosomes. We model the turnover process by considering a linked locus under sexually antagonistic selection. The entire process of a turnover may be divided into two phases, which are referred to as the stochastic and deterministic phases. The stochastic phase is when a new sex-determining allele just arises and is still rare and random genetic drift plays an important role. In the deterministic phase, the new allele further increases in frequency by positive selection. The theoretical results currently available are for the deterministic phase, which demonstrated that a turnover of a newly arisen sex-determining locus could benefit from selection at a linked locus under sexually antagonistic selection, by assuming that sexually antagonistic selection works in a form of balancing selection. In this work, we provide a comprehensive theoretical description of the entire process from the stochastic phase to the deterministic phase. In addition to balancing selection, we explore several other modes of selection on the linked locus. Our theory allows us make a quantitative argument on the rate of turnover and the effect of the mode of selection at the linked locus. We also performed simulations to explore the pattern of polymorphism around the new sex-determining locus. We find that the pattern of polymorphism is informative to infer how selection worked through the turnover process.

scholarly journals The maintenance of polygenic sex determination depends on the dominance of fitness effects which are predictive of the role of sexual antagonism

2020 ◽  
Author(s):  
Richard P. Meisel
Keyword(s):  
Sex Determination ◽  
Sex Chromosomes ◽  
Natural Populations ◽  
House Fly ◽  
Sexual Antagonism ◽  
Antagonistic Selection ◽  
Fitness Effects ◽  
Y Chromosomes ◽  
Sexually Antagonistic Selection ◽  
Polygenic Sex Determination

AbstractIn species with polygenic sex determination, multiple male- and/or female-determining loci on different proto-sex chromosomes segregate as polymorphisms within populations. The extent to which these polymorphisms are stable equilibria is not yet resolved. Previous work demonstrated that polygenic sex determination is most likely to be maintained as a stable polymorphism when the proto-sex chromosomes have opposite (sexually antagonistic) fitness effects in males and females. However, these models usually consider polygenic sex determination systems with only two proto-sex chromosomes, or they do not broadly consider the dominance of the variants under selection. To address these shortcomings, I used forward population genetic simulations to identify selection pressures that can maintain polygenic sex determination under different dominance scenarios in a system with more than two proto-sex chromosomes (modeled after the house fly). I found that overdominant fitness effects of male-determining proto-Y chromosomes in males are more likely to maintain polygenic sex determination than dominant, recessive, or additive fitness effects. I also found that additive fitness effects that maintain polygenic sex determination have the strongest signatures of sexually antagonistic selection, but there is also some evidence for sexually antagonism when fitness effects of proto-Y chromosomes are dominant or recessive. More generally, these results suggest that the expected effect of sexually antagonistic selection on the maintenance of genetic variation in natural populations will depend on whether the alleles are sex-linked and the dominance of their fitness effects.

Environmental Changes and Sexually Antagonistic Selection

2018 ◽  
pp. 1-7 ◽  
Author(s):  
Tim Connallon ◽  
Matthew D Hall
Keyword(s):  
Environmental Changes ◽  
Antagonistic Selection ◽  
Sexually Antagonistic Selection
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