Non-random mating in natural populations of the seaweed fly, Coelopa frigida

Day, Thomas H.; Butlin, Roger K.

doi:10.1038/hdy.1987.35

Cited by 20 publications

(16 citation statements)

References 50 publications

(40 reference statements)

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“…A new inversion can also be favoured if it contains both a locus which contributes to assortative mating and a locus which contributes to hybrid inviability (Trickett & Butlin ; Dagilis & Kirkpatrick ). Empirical data support the presence of loci within rearrangements that contribute to sexual and ecologically important traits (Day & Butlin ; Lowry & Willis ; Ayala et al . ; Andrew & Rieseberg ; Friedman & Willis ; Oneal et al .…”

Section: Introductionmentioning

confidence: 90%

A combination of sexual and ecological divergence contributes to rearrangement spread during initial stages of speciation

et al. 2017

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Chromosomal rearrangements between sympatric species often contain multiple loci contributing to assortative mating, local adaptation and hybrid sterility. When and how these associations arise during the process of speciation remains a subject of debate. Here, we address the relative roles of local adaptation and assortative mating on the dynamics of rearrangement evolution by studying how a rearrangement covaries with sexual and ecological trait divergence within a species. Previously, a chromosomal rearrangement that suppresses recombination on the Z (sex) chromosome was identified in European corn borer moths (Ostrinia nubilalis). We further characterize this recombination suppressor and explore its association with variation in sex pheromone communication and seasonal ecological adaptation in pairs of populations that are divergent in one or both of these characteristics. Direct estimates of recombination suppression in pedigree mapping families indicated that more than 39% of the Z chromosome (encompassing up to ~10 megabases and ~300 genes) resides within a nonrecombining unit, including pheromone olfactory receptor genes and a major quantitative trait locus that contributes to ecotype differences (Pdd). Combining direct and indirect estimates of recombination suppression, we found that the rearrangement was occasionally present between sexually isolated strains (E vs. Z) and between divergent ecotypes (univoltine vs. bivoltine). However, it was only consistently present when populations differed in both sexual and ecological traits. Our results suggest that independent of the forces that drove the initial establishment of the rearrangement, a combination of sexual and ecological divergence is required for rearrangement spread during speciation.

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Section: Introductionmentioning

confidence: 90%

A combination of sexual and ecological divergence contributes to rearrangement spread during initial stages of speciation

et al. 2017

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“…It is possible that female behaviour varies with chromosome I genotype, producing departures from random mating as well as variation in mating success. This issue is considered in the accompanying paper (Day and Butlin, 1987). Mating behaviour in seaweed flies is currently under investigation.…”

Section: Mixed Paternitymentioning

confidence: 99%

Differential mating success in populations of seaweed flies (Coelopa frigida)

et al. 1987

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The reproductive success of seaweed flies (Coelopa frigida) was studied in natural populations. The sizes of females, both mothers and those not producing eggs, as well as of the males available to be fathers, were estimated from their wing lengths. The animals were also classified for their genotype at the alcohol dehydrogenase (Adh) locus-a polymorphic locus tightly associated with a large chromosomal inversion. The fathers' genotypes were inferred from the genotypes of the mother and her offspring. Males of different Adh genotypes had different reproductive success. Reproductive success of genotypes was negatively correlated with the mean sizes of males. Differences in the reproductive success of females could be accounted for by their differential egg laying capacity, and is probably not a consequence of their mating behaviour. The incidence of progeny with mixed paternity varied from 20 per cent initially, to about 65 per cent when the animals had been mating for 6 days. It appears from previous work that large males are more successful in laboratory trials, yet under natural conditions genotypes associated with large male size have low mating success. Ways of reconciling these results and their relevance to understanding the inversion polymorphisms are discussed.

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“…In fact, precopulatory sexual selection appears to occur as a side effect of sexual conflict with large males gaining an advantage through their greater ability to withstand violent female rejection responses (Gilburn et al, 1992;Crean and Gilburn, 1998;Crean et al, 2000). However, a previous study investigating paternity of wild flies suggested the production of an excess of heterokaryotypic offspring (Day and Butlin, 1987).…”

Section: Introductionmentioning

confidence: 92%

The effect of an inversion system and the time interval between matings on postcopulatory sexual selection in the seaweed fly, Coelopa frigida

Blyth

Gilburn

2005

Heredity

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The seaweed fly, Coelopa frigida, exhibits LMSP. A large chromosomal inversion system affects many traits including egg-to-adult viability via heterosis. Consequently, there is also considerable potential for cryptic female mate choice to operate on the basis of sperm karyotype. Here, we investigated the effect of time interval and chromosomal inversion karyotype on postcopulatory sexual selection. Homokaryotypic females were mated with a male of the same and a male of the opposite homokaryotype. The order of the matings was varied so cryptic female mate choice could operate either in concert or antagonistically with LMSP. LMSP was found when there was a 24 h time interval between matings, irrespective of the order in which the males were mated. However, when the males were mated in quick succession the order of mating was important. When LMSP and cryptic female mate choice work in concert a high level of LMSP was found. However, when the male of opposite homokaryotype mated first, then first male sperm precedence was observed. This suggests that polyandrous females might be able to bias paternity but only when matings occur in quick succession. Consequently, population density is likely to affect the operation of postcopulatory sexual selection. Heredity (2005) 95, 174-178.

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Non-random mating in natural populations of the seaweed fly, Coelopa frigida

Cited by 20 publications

References 50 publications

A combination of sexual and ecological divergence contributes to rearrangement spread during initial stages of speciation

A combination of sexual and ecological divergence contributes to rearrangement spread during initial stages of speciation

Differential mating success in populations of seaweed flies (Coelopa frigida)

The effect of an inversion system and the time interval between matings on postcopulatory sexual selection in the seaweed fly, Coelopa frigida

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