scholarly journals Assortative mating, sexual selection, and their consequences for gene flow in Littorina

Evolution ◽  
2020 ◽  
Vol 74 (7) ◽  
pp. 1482-1497
Author(s):  
Samuel Perini ◽  
Marina Rafajlović ◽  
Anja M. Westram ◽  
Kerstin Johannesson ◽  
Roger K. Butlin
Keyword(s):  
Sexual Selection ◽  
Gene Flow ◽  
Assortative Mating

scholarly journals Variation in sexual dimorphism and assortative mating do not predict genetic divergence in the sexually dimorphic Goodeid fish Girardinichthys multiradiatus

2012 ◽  
Vol 58 (3) ◽  
pp. 440-452 ◽  
Author(s):  
C. Macías Garcia ◽  
G. Smith ◽  
C. González Zuarth ◽  
J. A. Graves ◽  
M. G. Ritchie
Keyword(s):  
Sexual Selection ◽  
Gene Flow ◽  
Sexual Dimorphism ◽  
Assortative Mating ◽  
Genetic Divergence ◽  
Isolation By Distance ◽  
Morphological Differentiation ◽  
Morphological Differences ◽  
Or Gene ◽  
Male Morphology

Abstract Sexual dimorphism is often used as a proxy for the intensity of sexual selection in comparative studies of sexual selection and diversification. The Mexican Goodeinae are a group of livebearing freshwater fishes with large variation between species in sexual dimorphism in body shape. Previously we found an association between variation in morphological sexual dimorphism between species and the amount of gene flow within populations in the Goodeinae. Here we have examined if morphological differentiation within a single dimorphic species is related to assortative mating or gene flow between populations. In the Amarillo fish Girardinichthys multiradiatus studies have shown that exaggerated male fins are targets of female preferences. We find that populations of the species differ in the level of sexual dimorphism displayed due to faster evolution of differences in male than female morphology. However, this does not predict variation in assortative mating tests in the laboratory; in fact differences in male morphology are negatively correlated with assortative mating. Microsatellite markers reveal significant genetic differences between populations. However, gene flow is not predicted by either morphological differences or assortative mating. Rather, it demonstrates a pattern of isolation by distance with greater differentiation between watersheds. We discuss the caveats of predicting behavioural and genetic divergence from so-called proxies of sexual selection.

scholarly journals Pairing dynamics and the origin of species

2011 ◽  
Vol 279 (1731) ◽  
pp. 1085-1092 ◽  
Author(s):  
Oscar Puebla ◽  
Eldredge Bermingham ◽  
Frédéric Guichard
Keyword(s):  
Sexual Selection ◽  
Gene Flow ◽  
Mate Choice ◽  
Assortative Mating ◽  
Evolutionary Biology ◽  
Population Genetic Analysis ◽  
Flow Through ◽  
Individual Based Simulation ◽  
The Stability ◽  
Standing Question

Whether sexual selection alone can drive the evolution of assortative mating in the presence of gene flow is a long-standing question in evolutionary biology. Here, we report a role for pairing dynamics of individuals when mate choice is mutual, which is sufficient for the evolution of assortative mating by sexual selection alone in the presence of gene flow. Through behavioural observation, individual-based simulation and population genetic analysis, we evaluate the pairing dynamics of coral reef fish in the genus Hypoplectrus (Serranidae), and the role these dynamics can play for the evolution of assortative mating. When mate choice is mutual and the stability of mating pairs is critical for reproductive success, the evolution of assortative mating in the presence of gene flow is not only possible, but is also a robust evolutionary outcome.

scholarly journals Assortative mating, sexual selection and their consequences for gene flow in Littorina

2020 ◽  
Author(s):  
Samuel Perini ◽  
Marina Rafajlović ◽  
Anja M. Westram ◽  
Kerstin Johannesson ◽  
Roger K. Butlin
Keyword(s):  
Sexual Selection ◽  
Gene Flow ◽  
Natural Selection ◽  
Reproductive Isolation ◽  
Assortative Mating ◽  
Small Male ◽  
Mating Pattern ◽  
Barrier Effects ◽  
Divergent Natural Selection ◽  
Coastal Marine

AbstractWhen divergent populations are connected by gene flow, the establishment of complete reproductive isolation usually requires the joint action of multiple barrier effects. One example where multiple barrier effects are coupled consists of a single trait that is under divergent natural selection and also mediates assortative mating. Such multiple-effect traits can strongly reduce gene flow. However, there are few cases where patterns of assortative mating have been described quantitatively and their impact on gene flow has been determined. Two ecotypes of the coastal marine snail, Littorina saxatilis, occur in North Atlantic rocky-shore habitats dominated by either crab predation or wave action. There is evidence for divergent natural selection acting on size, and size-assortative mating has previously been documented. Here, we analyze the mating pattern in L. saxatilis with respect to size in intensively-sampled transects across boundaries between the habitats. We show that the mating pattern is mostly conserved between ecotypes and that it generates both assortment and directional sexual selection for small male size. Using simulations, we show that the mating pattern can contribute to reproductive isolation between ecotypes but the barrier to gene flow is likely strengthened more by sexual selection than by assortment.

scholarly journals Microsatellite DNA Evidence for Gene Flow in Neotropical Lek-Mating Long-Tailed Manakins

The Condor ◽  
2003 ◽  
Vol 105 (3) ◽  
pp. 580-586 ◽  
Author(s):  
David B. McDonald
Keyword(s):  
Sexual Selection ◽  
Gene Flow ◽  
Costa Rica ◽  
Clustering Analysis ◽  
Elevational Gradient ◽  
Dna Evidence ◽  
Lek Mating ◽  
Rapid Divergence ◽  
Para Determinar ◽  
Single Cluster

Abstract I genotyped lek-mating Long-tailed Manakins (Chiroxiphia linearis) at Monteverde and Santa Rosa, Costa Rica, 115 km apart. Cavalli-Sforza distance was 0.04, DLR was 0.18, and RST and θ were both 0.02. Bayesian clustering analysis indicated that both populations were part of a single cluster rather than from distinct clusters. I present a binomial test for probability of allelic absence as a function of sample size. Genotypic likelihood tests assigned 50% of Monteverde birds to Santa Rosa, versus 26% of Santa Rosa birds to Monteverde. Two lines of evidence supported the idea of asymmetric gene flow up the elevational gradient from Santa Rosa to Monteverde. Low differentiation at this spatial scale, despite intense sexual selection, suggests that sexual selection alone is unlikely to promote rapid divergence leading to speciation. Reduced gene flow, produced by geographic barriers or behavioral factors, may also be required. Evidencia de Flujo Génico Mediante ADN Microsatelital en Chiroxiphia linearis, un Ave Neotropical con Estrategia Reproductiva Tipo “Lek” Resumen. Determiné el genotipo de individuos de Chiroxiphia linearis en dos poblaciones separadas por 115 km, Monteverde y Santa Rosa en Costa Rica. La distancia de Cavalli-Sforza fue 0.04, DLR fue 0.18, y tanto el valor de RST como el de θ fue 0.02. Un análisis de agrupamiento bayesiano indicó que ambas poblaciones pertenecen a un mismo grupo y no a dos grupos diferentes. Presento una prueba binomial para determinar la probabilidad de ausencia alélica como una función del tamaño muestral. La prueba de probabilidad genotípica asignó al 50% de los individuos de Monteverde a la población de Santa Rosa, mientras que un 26% de los individuos de Santa Rosa fue asignado a Monteverde. Dos líneas de evidencia apoyan la idea de flujo génico asimétrico hacia arriba del gradiente altitudinal entre Santa Rosa y Monteverde. A pesar de la intensa presión selectiva sexual, la baja diferenciación a esta escala espacial sugiere que probablemente la selección sexual por sí sola no promueve la rápida divergencia que conduce a la especiación. También se requeriría reducción del flujo génico a través de barreras geográficas y factores conductuales.

scholarly journals Mechanisms of Assortative Mating in Speciation with Gene Flow: Connecting Theory and Empirical Research

2018 ◽  
Vol 191 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Michael Kopp ◽  
Maria R. Servedio ◽  
Tamra C. Mendelson ◽  
Rebecca J. Safran ◽  
Rafael L. Rodríguez ◽  
...  
Keyword(s):  
Gene Flow ◽  
Assortative Mating ◽  
Empirical Research
Sign in / Sign up

Export Citation Format

Share Document