Quantitative genetic models of sexual selection

2004 ◽  
Vol 19 (5) ◽  
pp. 264-271 ◽  
Author(s):  
Louise S. Mead ◽  
Stevan J. Arnold
Keyword(s):  
Sexual Selection ◽  
Genetic Models ◽  
Quantitative Genetic

scholarly journals Peak shifts and extinction under sex-specific selection

2021 ◽  
Author(s):  
Stephen P. De Lisle
Keyword(s):  
Sexual Selection ◽  
Sexual Dimorphism ◽  
Peak Shift ◽  
Adaptive Landscape ◽  
Population Estimates ◽  
Sexual Antagonism ◽  
Adaptive Landscapes ◽  
Quantitative Genetic ◽  
Complex Adaptive ◽  
The Face

AbstractA well-known property of sexual selection combined with a cross sex genetic correlation (rmf), is that it can facilitate a peak shift on the adaptive landscape. How do these diversifying effects of sexual selection +rmf balance with the constraints imposed by such sexual antagonism, to affect macroevolution of sexual dimorphism? Here, I extend existing quantitative genetic models of evolution on complex adaptive landscapes. Beyond recovering classical predictions for the conditions promoting a peak shift, I show that when rmf is moderate to strong, relatively weak sexual selection is required to induce a peak shift in males only. Increasing the strength of sexual leads to a sexually-concordant peak shift, suggesting that macroevolutionary rates of sexual dimorphism may be largely decoupled from the strength of within-population sexual selection. Accounting explicitly for demography further reveals that sex-specific peak shifts may be more likely to be successful than concordant shifts in the face of extinction, especially when natural selection is strong. An overarching conclusion is that macroevolutionary patterns of sexual dimorphism are unlikely to be readily explained by within-population estimates of selection or constraint alone.

scholarly journals Individual-based simulation of sexual selection: A quantitative genetic approach

2010 ◽  
Vol 1 (1) ◽  
pp. 2003-2011
Author(s):  
D. van Dijk ◽  
P.M.A. Sloot ◽  
J.C. Tay ◽  
M.C. Schut
Keyword(s):  
Sexual Selection ◽  
Genetic Approach ◽  
Quantitative Genetic ◽  
Individual Based Simulation

Competitive Speciation in Quantitative Genetic Models

2000 ◽  
Vol 204 (3) ◽  
pp. 467-478 ◽  
Author(s):  
BARBARA DROSSEL ◽  
ALAN MCKANE
Keyword(s):  
Genetic Models ◽  
Quantitative Genetic

Amplifiers and the handicap principle in sexual selection: a different emphasis

1989 ◽  
Vol 235 (1281) ◽  
pp. 383-406 ◽  
Keyword(s):  
Sexual Selection ◽  
Genetic Association ◽  
Female Choice ◽  
Mating Success ◽  
Population Genetic ◽  
Genetic Model ◽  
Genetic Models ◽  
Handicap Principle ◽  
Resolution Power ◽  
Male Display

Population genetic models have shown that female choice is a potential cause of the evolution of male display. In these models the display is assumed to be the immediate object of female choice. Here I present an explicit genetic model that shows that male display can evolve as a consequence of female choice even when the display is not the immediate object of choice. When females initially base their preferences on the existence of variance in a cue that is correlated with male viability, a rare display can evolve to fixation if it amplifies the previously recognized differences in males, (i. e. if it increases the resolution power of females with respect to the original cue). By definition, amplifying displays (or amplifiers) increase mating success of the more viable males and decrease mating success of the less viable males. Therefore, the higher the frequency of the preferred, more viable males, the more likely it is that amplifiers will evolve to fixation. The evolution of an amplifier is further facilitated by a genetic association that is built up between the amplifier allele and the more viable allele. If the expression of the amplifier is limited to the more viable males, the amplifier will evolve to fixation provided only that the change in total fitness to the more viable males (higher mating success, lower viability), is positive.

Sign in / Sign up

Export Citation Format

Share Document