Components of Reproductive Isolation Between North American Pheromone Strains of the European Corn Borer

Dopman, Erik B.; Robbins, Paul S.; Seaman, Abby

doi:10.1111/j.1558-5646.2009.00883.x

Cited by 142 publications

(206 citation statements)

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“…First, multiple 'speciation phenotypes' (Shaw and Mullen, 2011) in ECB have known sex-linked factors, including male pheromone response and diapause timing (McLeod, 1978;Dopman et al, 2004;Wanner et al, 2010;Ikten et al, 2011). Second, a recent study indicated that large isolation effect sizes are common between ECB strains (RI ⩾ 0.5 for 4 of 7 forms of isolation; Dopman et al, 2010). Given this prior work and the large size of the putative inversion (7 cM or~4 Mb; Figure 2b), there would appear to be good reason to expect diverse and potent barrier loci in an inversion on the ECB sex chromosome.…”

Section: Discussionmentioning

confidence: 99%

“…Differences at Pdd contribute to temporal isolation between Z and E strains in North America by conferring an~30-day shift in emergence and thus adult-mating flights (Wadsworth et al, 2013). Shifts in adult flights between univoltine Z and bivoltine E populations eliminate as much as 85% gene flow in nature (Dopman et al, 2010).…”

Section: Colocalization Of Reproductive Isolationmentioning

confidence: 99%

“…The sex (Z) chromosome harbors several known genetic factors for adaptation and/or barrier traits, including those underlying behavioral isolation (Roelofs et al, 1987;Dopman et al, 2004) and temporal isolation (Glover et al, 1992;Dopman et al, 2005). Current and historical gene exchange between ECB strains is likely, as indicated by hybridization in Europe and North America (Dopman et al, 2010;Coates et al, 2013), geographic variation in strength of reproductive isolation (ranging from 0.91 to 0.99; Dopman et al, 2010) and molecular evidence for an isolationwith-migration model of divergence (2 Nm~10; Malausa et al, 2007). Whereas most loci show extensive shared polymorphism (for example, F ST o0.05), a possible island of speciation along an~1-cM swath of the Z chromosome consists of four genes (Tpi and three olfactory receptors, ORs) and reveals ECB strains as nearly reciprocally monophyletic (for example, F ST 40.7; Dopman et al, 2005;Dopman, 2011;Lassance et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The 'Z' and 'E' strains of European corn borer (ECB, Ostrinia nubilalis) are incipient species that colonized North America~100 ya without an appreciable bottleneck from allopatric locations in Italy (mixture of E and Z strains) and Hungary (exclusively Z-strain; Smith, 1920;Caffrey, 1927;Klun and Cooperators, 1975;Dopman, 2011). Strains are recently diverged (~100 000 ya; Malausa et al, 2007) and are textbook examples of speciation (Coyne and Orr, 2004), in which one species is splitting into two through the evolution of many forms of reproductive isolation (Dopman et al, 2010). The sex (Z) chromosome harbors several known genetic factors for adaptation and/or barrier traits, including those underlying behavioral isolation (Roelofs et al, 1987;Dopman et al, 2004) and temporal isolation (Glover et al, 1992;Dopman et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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A recombination suppressor contributes to ecological speciation in OSTRINIA moths

Wadsworth

Dopman

2015

Heredity

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Despite unparalleled access to species' genomes in our post-genomic age, we often lack adequate biological explanations for a major hallmark of the speciation process-genetic divergence. In the presence of gene flow, chromosomal rearrangements such as inversions are thought to promote divergence and facilitate speciation by suppressing recombination. Using a combination of genetic crosses, phenotyping of a trait underlying ecological isolation, and population genetic analysis of wild populations, we set out to determine whether evidence supports a role for recombination suppressors during speciation between the Z and E strains of European corn borer moth (Ostrinia nubilalis). Our results are consistent with the presence of an inversion that has contributed to accumulation of ecologically adaptive alleles and genetic differentiation across roughly 20% of the Ostrinia sex chromosome (~4 Mb). Patterns in Ostrinia suggest that chromosomal divergence may involve two separate phases-one driving its transient origin through local adaptation and one determining its stable persistence through differential introgression. As the evolutionary rate of rearrangements in lepidopteran genomes appears to be one of the fastest among eukaryotes, structural mutations may have had a disproportionate role during adaptive divergence and speciation in Ostrinia and in other moths and butterflies.

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Section: Discussionmentioning

confidence: 99%

Section: Colocalization Of Reproductive Isolationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A recombination suppressor contributes to ecological speciation in OSTRINIA moths

Wadsworth

Dopman

2015

Heredity

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“…The first set is sex-linked, as often in lepidopteran incipient species (Prowell, 1998). It includes genes affecting post-diapause development time (Pdd: Glover et al, 1992;Dopman et al, 2005Dopman et al, , 2010, male behavioural response to different female sex pheromones (Resp: Glover et al, 1990;Dopman et al, 2004Dopman et al, , 2005Dopman et al, , 2010, differential success rate in larval development on either host plant (Calcagno et al, 2007) and/or other genes located in the vicinity of Tpi (Bourguet et al, 2000;Martel et al, 2003;Bontemps et al, 2004;Dopman et al, 2004Dopman et al, , 2005. The second set of candidates is autosomal and includes genes responsible for differences in female sex pheromones (Pher: Roelofs et al, 1987;Dopman et al, 2004Dopman et al, , 2010Lassance et al, 2010), an unidentified close-range mechanism ensuring assortative mating in laboratory settings (AssMat: Pélozuelo et al, 2007) and/or other genes located in the vicinity of Mpi (Bourguet et al, 2000;Martel et al, 2003;Bontemps et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

From Russia with lobe: genetic differentiation in trilobed uncus Ostrinia spp. follows food plant, not hairy legs

et al. 2011

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Trilobed uncus taxa of the genus Ostrinia (Lepidoptera, Crambidae) illustrate the complex relationship, at early stages of speciation, between reproductive isolation and differentiation in morphology, resource use and genetic variation. On the basis of behaviour and ecology, we recently hypothesized that individuals with small mid-tibiae belong to two distinct species depending on host plant-O. nubilalis and O. scapulalis sensu Frolov et al. (2007) feeding on maize and on a number of dicotyledons, respectively. Individuals with small, medium or massive mid-tibiae would all belong to O. scapulalis as long as they feed on these dicotyledons. This contrasts with previous taxonomy, which distinguished three species by male mid-tibia morphology, regardless of host plant. Here, we test our hypothesis by examining the genetic structure of Ostrinia populations from regions with mid-tibia polymorphismWestern Russia and Kazakhstan-and comparing it with that of French populations where only small mid-tibiae occur. Results support two predictions: (1) maize-and dicotyledoncollected populations are genetically differentiated from each other like in France, and (2) dicotyledon-collected populations show no genetic evidence of consisting of more than one species. Between-species differentiation was unrelated to geographic distance, despite significant isolation by distance within species. The distinction between two and only two species differing by host plant thus holds at continental scale. Interestingly, one microsatellite locus contributed B10 times more than the others to differentiation between both taxa. This deserves further investigation, as it might reveal a linkage between this outlier and loci involved in host-plant adaptation and/or reproductive isolation.

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Isolating Mechanisms

Kulmuni¹,

Butlin²

2021

Encyclopedia of Life Sciences

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Isolating mechanisms are characteristics of species that reduce or prevent successful reproduction with members of other species. Viewed genetically, they are characters that act as barriers to the exchange of genes between populations. Most of these barriers are incidental consequences of evolutionary processes within populations, but they can be elaborated directly by natural selection. They can take many forms, from mismatches between mating signals and preferences to genetic incompatibilities causing sterility of hybrids. Barriers may not be stable through time and can erode, for example due to change in the environment. A major outstanding challenge is to document the contributions of different forms of isolation to the overall barrier to gene exchange between species and to understand the order in which these barriers evolve, and how they interact with each other. Key Concepts Isolating mechanisms are intrinsic characteristics of species that reduce or prevent successful reproduction with members of other species. Many, perhaps most, isolating mechanisms are incidental consequences of evolutionary processes within a population, not fashioned by selection for the purpose of preventing gene flow. Individual barriers to gene exchange act sequentially which means that barriers acting early in the life cycle tend to have the greatest effect even though they may not have been the first to evolve. Ecological components of isolation evolve through adaptation to local conditions and may reduce the probability of mating or the fitness of hybrids. Behavioural components of isolation prevent mating even when reproductively active individuals meet and may evolve due to sexual selection on mating signals and responses. Barriers can occur after mating but before zygote formation. These barriers may be a side effect of evolutionary conflicts of interest between males and females. Divergent populations accumulate genetic differences. Inevitably, some of the new traits or genes are incompatible, resulting in isolation through reduced viability or fertility of hybrids, especially in the heterogametic sex. Reproductive isolation builds up by the accumulation of barriers to gene exchange. This process is neither linear nor deterministic. Instead, barriers accumulate at different rates during speciation and may act in combination in ways that are not predicted by the effects of single barriers. There is still a need to know more about the range of barriers operating in individual species pairs, the reasons for their evolution, the order in which they evolved and their genetic architecture.

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Components of Reproductive Isolation Between North American Pheromone Strains of the European Corn Borer

Abstract: Of 12 potential reproductive isolating barriers between closely related Z-and E-pheromone strains of the

Cited by 142 publications

References 123 publications

A recombination suppressor contributes to ecological speciation in OSTRINIA moths

A recombination suppressor contributes to ecological speciation in OSTRINIA moths

From Russia with lobe: genetic differentiation in trilobed uncus Ostrinia spp. follows food plant, not hairy legs

Isolating Mechanisms

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