A recombination suppressor contributes to ecological speciation in OSTRINIA moths

Wadsworth, Crista B.; Li, X; Dopman, Erik B.

doi:10.1038/hdy.2014.128

Cited by 32 publications

(64 citation statements)

References 75 publications

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“…Thus, no recombination among 1163 BC 1 individuals is most probably caused by suppression of chromosome crossing over. Taking into account for classical linkage analysis, similar pattern of gene expression results in the present study and recent finding for mimicry and pheromone response (Joron et al 2011;Nishikawa et al 2015;Wadsworth et al 2015), inversion-associated mutation is a possible explanation for Bm origin. This supposes the Bm and Ws share a mechanism for regulating wing and body colouration.…”

Section: Discussionsupporting

confidence: 69%

Mapping and recombination analysis of two moth colour mutations, Black moth and Wild wing spot, in the silkworm Bombyx mori

et al. 2015

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Many lepidopteran insects exhibit body colour variations, where the high phenotypic diversity observed in the wings and bodies of adults provides opportunities for studying adaptive morphological evolution. In the silkworm Bombyx mori, two genes responsible for moth colour mutation, Bm and Ws, have been mapped to 0.0 and 14.7 cM of the B. mori genetic linkage group 17; however, these genes have not been identified at the molecular level. We performed positional cloning of both genes to elucidate the molecular mechanisms that underlie the moth wing-and body-colour patterns in B. mori. We successfully narrowed down Bm and Ws to~2-Mb-long and 100-kb-long regions on the same scaffold Bm_scaf33. Gene prediction analysis of this region identified 77 candidate genes in the Bm region, whereas there were no candidate genes in the Ws region. Fluorescence in-situ hybridisation analysis in Bm mutant detected chromosome inversion, which explains why there are no recombination in the corresponding region. The comparative genomic analysis demonstrated that the candidate regions of both genes shared synteny with a region associated with wing-and body-colour variations in other lepidopteran species including Biston betularia and Heliconius butterflies. These results suggest that the genes responsible for wing and body colour in B. mori may be associated with similar genes in other Lepidoptera.

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Section: Discussionsupporting

confidence: 69%

Mapping and recombination analysis of two moth colour mutations, Black moth and Wild wing spot, in the silkworm Bombyx mori

et al. 2015

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“…Overall, the gene order in O. nubilalis between kettin at one end and paraplegin near the other end was the same as in B. mori. However, we did not map any genes surrounding Tpi, where Wadsworth et al (39) have detected a region of low recombination that probably corresponds to an inversion. Additionally, the order of the two end markers pdp1 and bgi03892 was inverted (Fig.…”

Section: Resultsmentioning

confidence: 99%

Genetic mapping of male pheromone response in the European corn borer identifies candidate genes regulating neurogenesis

Koutroumpa

Groot

Dekker

et al. 2016

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

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The sexual pheromone communication system of moths is a model system for studies of the evolution of reproductive isolation. Females emit a blend of volatile components that males detect at a distance. Species differences in female pheromone composition and male response directly reinforce reproductive isolation in nature, because even slight variations in the species-specific pheromone blend are usually rejected by the male. The mechanisms by which a new pheromone signal-response system could evolve are enigmatic, because any deviation from the optimally attractive blend should be selected against. Here we investigate the genetic mechanisms enabling a switch in male response. We used a quantitative trait locus-mapping approach to identify the genetic basis of male response in the two pheromone races of the European corn borer, Ostrinia nubilalis. Male response to a 99:1 vs. a 3:97 ratio of the E and Z isomers of the female pheromone is governed by a single, sex-linked locus. We found that the chromosomal region most tightly linked to this locus contains genes involved in neurogenesis but, in accordance with an earlier study, does not contain the odorant receptors expressed in the male antenna that detect the pheromone. This finding implies that differences in the development of neuronal pathways conveying information from the antenna, not differences in pheromone detection by the odorant receptors, are primarily responsible for the behavioral response differences among the males in this system. Comparison with other moth species reveals a previously unexplored mechanism by which male pheromone response can change in evolution.Ostrinia nubilalis | Z chromosome | pheromone response | sexual communication | QTL analysis

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“…Specific gene candidates for shifts in insect seasonal timing have been difficult to accumulate via QTL mapping because of complex genetic bases or genomic architectures between populations (Tauber et al, 1977;Feder et al, 2002;Bradshaw et al, 2005;Mathias et al, 2007;Wadsworth et al, 2015). In such systems, transcriptome profiling can be a useful alternative to QTL mapping to nominate candidate genes.…”

Section: Gene Candidatesmentioning

confidence: 99%

“…polygenic, epistasis) or genomic architecture (e.g. chromosomal rearrangements), have confounded the identification of genes underlying variation in diapause timing (Tauber et al, 1977;Feder et al, 2002;Bradshaw et al, 2005;Mathias et al, 2007;Emerson et al, 2010;Wadsworth et al, 2015). Despite these difficulties, genes involved in the transitions of diapause phases have been identified.…”

Section: Introductionmentioning

confidence: 99%

“…First, the major genetic factor Pdd ( post-diapause development) has been shown to map to a region of the Z (sex) chromosome that may be rearranged between corn borer strains (Glover et al, 1992;Dopman et al, 2004Dopman et al, , 2005Wadsworth et al, 2015). Second, high temperatures and/or long-day photoperiod cues are known to stimulate diapause termination in corn borers (McLeod and Beck, 1963).…”

Section: Introductionmentioning

confidence: 99%

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Transcriptome profiling reveals mechanisms for the evolution of insect seasonality

Wadsworth

Dopman

2015

Journal of Experimental Biology

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Rapid evolutionary change in seasonal timing can facilitate ecological speciation and resilience to climate warming. However, the molecular mechanisms behind shifts in animal seasonality are still unclear. Evolved differences in seasonality occur in the European corn borer moth (Ostrinia nubilalis), in which early summer emergence in E-strain adults and later summer emergence in Z-strain adults is explained by a shift in the length of the termination phase of larval diapause. Here, we sample from the developmental time course of diapause in both strains and use transcriptome sequencing to profile regulatory and amino acid changes associated with timing divergence. Within a previously defined quantitative trait locus (QTL), we nominate 48 candidate genes, including several in the insulin signaling and circadian rhythm pathways. Genome-wide transcriptional activity is negligible during the extended Z-strain termination, whereas shorter E-strain termination is characterized by a rapid burst of regulatory changes involved in resumption of the cell cycle, hormone production and stress response. Although gene expression during diapause termination in Ostrinia is similar to that found previously in flies, nominated genes for shifts in timing are species specific. Hence, across distant relatives the evolution of insect seasonality appears to involve unique genetic switches that direct organisms into distinct phases of the diapause pathway through wholesale restructuring of conserved gene regulatory networks.

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A recombination suppressor contributes to ecological speciation in OSTRINIA moths

Cited by 32 publications

References 75 publications

Mapping and recombination analysis of two moth colour mutations, Black moth and Wild wing spot, in the silkworm Bombyx mori

Mapping and recombination analysis of two moth colour mutations, Black moth and Wild wing spot, in the silkworm Bombyx mori

Genetic mapping of male pheromone response in the European corn borer identifies candidate genes regulating neurogenesis

Transcriptome profiling reveals mechanisms for the evolution of insect seasonality

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