Variations in Flight Patterns of European Corn Borer (Lepidoptera: Pyralidae) in New York1

Eckenrode, C. J.; Robbins, Paul S.; Andaloro, J. T.

doi:10.1093/ee/12.2.393

Cited by 37 publications

(37 citation statements)

References 9 publications

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“…Recent investigations done on the well-studied Rhagoletis group have indicated that diapause diVerences associated with host races may have been the key trait that allowed for the initiation of diVerentiation, rather than simply initial diVerences in host aYliation (Feder et al 2003). Also, the European corn borer, Ostrinia nubilalis (Lepidoptera) in central New York state has a univoltine strain that emerges in July (between the two Xights of the bivoltine strain; Eckenrode et al 1983). As with our Papilio late Xight, there is a Z-linked factor that controls the postdiapause development time (Glover et al 1992).…”

Section: Discussionmentioning

confidence: 99%

Allochronic isolation and incipient hybrid speciation in tiger swallowtail butterflies

et al. 2009

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Hybridization leading to reproductively isolated, novel genotypes is poorly understood as a means of speciation and few empirical examples have been studied. In 1999, a previously non-existent delayed flight of what appeared to be the Canadian tiger swallowtail butterfly, Papilio canadensis, was observed in the Battenkill River Valley, USA. Allozyme frequencies and morphology suggest that this delayed flight was the product of hybridization between Papilio canadensis and its sibling species Papilio glaucus. The mitochondrial DNA (mtDNA) restriction fragment length polymorphisms presented here indicate that only P. canadensis-like mtDNA occurs in this population, suggesting that introgression likely occurred from hybrid males mating with P. canadensis females. Preliminary studies of this population indicated that delayed post-diapause pupal emergence in this hybrid genotype was the root cause behind the observed delayed flight, which suggests a potential empirical example of a mechanism leading to reproductive isolation. Here we provide further evidence of the role of adult pupal emergence as a reproductive barrier likely leading to reproductive isolation. In particular, we present results from pupal emergence studies using four different spring and two different winter temperature treatments. The results indicate a clear separation of adult emergences between the hybrid population and both parental species. However, our results indicate that exceptionally hot springs are likely to lead to greater potential for overlap between the local parental species, P. canadensis, and this delayed population with hybrid origins. Conversely, our results also show that warmer winters are likely to increase the temporal separation of the hybrid population and the parental species. Finally, we report recently collected evidence that this hybrid population remains morphologically distinct.

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Section: Discussionmentioning

confidence: 99%

Allochronic isolation and incipient hybrid speciation in tiger swallowtail butterflies

et al. 2009

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“…Some of these must be UZ x BE hybrids because they were generated at sites devoid of BZ borers. Initially, this seems improbable given the temporal differences in emergence of the bivoltine and univoltine insects, but blacklight (Eckenrode et al 1983) and pheromone trap surveys indicate that there is considerable overlap of the univoltine flight and the second flight of the bivoltine insects.…”

Section: Discussionmentioning

confidence: 99%

“…For a review of the early studies on life histories and the distribution of voltinism biotypes, see Brindley & Dicke (1963). Most recently, the voltinism patterns of Europ.ean corn borer in New York have been determined using blacklight traps (Eckenrode et al 1983) and direct field collection of larvae and pupae (Roelofs et al 1985). From these studies, it was clear that both bivoltine and univoltine populations exist in New York, often sympatrically.…”

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confidence: 99%

Gene Flow Among Three Races of European Corn Borers (Lepidoptera: Pyralidae) in New York State

Glover

Knodel

Robbins

et al. 1991

Environmental Entomology

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In New York state, there are three races of European corn borer moths, which are characterized principally by differences in voltinism and the sex pheromone communication system. One race is bivoltine, with females producing and males responding to a 99:1 EIZ isomeric ratio of~1l-14:0Ac's as the sex pheromone. Two races, one univoltine and one bivoltine, produce and respond to a 3:97 E 12 blend of~1l-14 :OAc·s. The races are referred to as BE, UZ, and BZ to denote these differences. Analyses by gas chromatography of field-collected females indicate that there is significant hybridization between the Z and E races when in sympatry, with hybrid females producing a 68:32 ratio of E/Zl1-14:OAc. Gene flow among the races was investigated using differences in triose phosphate isomerase (TPI) allozyme frequencies of moths from sites sampled across the state. The fixed nature of the Tpi-l allele in the BE race and increases in the Tpi-l allele frequencies in UZ populations in sympatry with the BE race support the hypothesis that gene flow following hybridization is unidirectional from BE populations into the Z populations. In addition, the TPI genotypes of the 10 hybrid females analyzed were consistent with hybridization occurring by E males mating with Z females.

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“…In New York state, populations are either bivoltine, with an early first generation and a late second generation, or univoltine, with a single generation in the middle of the season (22). Adults from the univoltine population are temporally isolated from those of the bivoltine population (23). Voltinism patterns reflect differences in postdiapause development (PDD) time, the time to pupation for over-wintering larvae under temperature and photoperiod conditions conducive to breaking diapause.…”

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confidence: 99%

Consequences of reproductive barriers for genealogical discordance in the European corn borer

Dopman

Pérez

Bogdanowicz

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

149

231

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Speciation involves the origin of trait differences that limit or prevent gene exchange and ultimately results in daughter populations that form monophyletic or exclusive genetic groups. However, for recently diverged populations or species between which reproductive isolation is often incomplete, gene genealogies will be discordant, and most regions of the genome will display nonexclusive genealogical patterns. In these situations, genome regions for which one or both species are exclusive groups may mark the footprint of recent selective sweeps. Alternatively, such regions may include or be closely linked to ''speciation genes,'' genes involved in reproductive isolation. Therefore, comparisons of gene genealogies allow inferences about the genetic architectures of both reproductive isolation and adaptation. Contrasting genealogical relationships in sexually isolated pheromone strains of the European corn borer moth (Ostrinia nubilalis) demonstrate the relevance of this approach. Genealogies for five gene regions are discordant, and only one molecular marker, the sex-linked gene Tpi, has evidence for pheromone strain exclusivity. Tpi maps to a position on the sex chromosome that is indistinguishable from a major factor (Pdd) affecting differences in postdiapause development time. The major factor (Resp) determining male behavioral response to pheromone is also sex-linked, but maps 20 -30 cM away. Exclusivity at Tpi may be a consequence of these linkage relationships because evidence from phenotypic variation in natural populations implicates both Pdd and Resp as candidates for genes involved in recent sweeps and͞or reproductive isolation between strains.genealogy ͉ genetic linkage map ͉ introgression ͉ selective sweep ͉ speciation

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Variations in Flight Patterns of European Corn Borer (Lepidoptera: Pyralidae) in New York1

Cited by 37 publications

References 9 publications

Allochronic isolation and incipient hybrid speciation in tiger swallowtail butterflies

Allochronic isolation and incipient hybrid speciation in tiger swallowtail butterflies

Gene Flow Among Three Races of European Corn Borers (Lepidoptera: Pyralidae) in New York State

Consequences of reproductive barriers for genealogical discordance in the European corn borer

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