Different hybrid effects in reciprocal crosses betweenChironomus thummi thummi andCh. th. piger including spontaneous chromsome aberrations and sterility

Hägele, Klaus

doi:10.1007/bf00605894

Cited by 29 publications

(16 citation statements)

References 11 publications

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“…). The same effect is already known from hybrids when C. riparius is crossed with C. piger , the sister species that is free of Cla‐element insertions across chromosomal arms (Hägele ; Schmidt ). Asynapsis of homologous chromosomes is very pronounced in crosses of the sister species, which might be due to the stronger difference in Cla‐element distribution patterns.…”

Section: Discussionsupporting

confidence: 60%

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Chironomus riparius (Diptera) genome sequencing reveals the impact of minisatellite transposable elements on population divergence

et al. 2017

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Active transposable elements (TEs) may result in divergent genomic insertion and abundance patterns among conspecific populations. Upon secondary contact, such divergent genetic backgrounds can theoretically give rise to classical Dobzhansky-Muller incompatibilities (DMI), thus contributing to the evolution of endogenous genetic barriers and eventually causing population divergence. We investigated differential TE abundance among conspecific populations of the nonbiting midge Chironomus riparius and evaluated their potential role in causing endogenous genetic incompatibilities between these populations. We focussed on a Chironomus-specific TE, the minisatellite-like Cla-element, whose activity is associated with speciation in the genus. Using a newly generated and annotated draft genome for a genomic study with five natural C. riparius populations, we found highly population-specific TE insertion patterns with many private insertions. A significant correlation of the pairwise F estimated from genomewide single-nucleotide polymorphisms (SNPs) and the F estimated from TEs is consistent with drift as the major force driving TE population differentiation. However, the significantly higher Cla-element F level due to a high proportion of differentially fixed Cla-element insertions also indicates selection against segregating (i.e. heterozygous) insertions. With reciprocal crossing experiments and fluorescent in situ hybridization of Cla-elements to polytene chromosomes, we documented phenotypic effects on female fertility and chromosomal mispairings. We propose that the inferred negative selection on heterozygous Cla-element insertions may cause endogenous genetic barriers and therefore acts as DMI among C. riparius populations. The intrinsic genomic turnover exerted by TEs may thus have a direct impact on population divergence that is operationally different from drift and local adaptation.

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Section: Discussionsupporting

confidence: 60%

“…; Schmidt ). Depending on the crossing direction, two incompatibility syndromes involving hybrid dysgenesis have been described in these closely related midges, the Rud and the HLE syndrome (Hägele , , , ; Hägele & Oschmann ; Hägele & Lachmann ; Hägele et al . ; Hägele & Kasper‐Sonnenberg ).…”

Section: Introductionmentioning

confidence: 99%

Chironomus riparius (Diptera) genome sequencing reveals the impact of minisatellite transposable elements on population divergence

et al. 2017

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“…There are some early observations (Sturtevant, 1939;Belgovsky, 1937;Miller, 1950) of increasing rates of lethal and visible mutations in Drosophila hybrids. Several studies on hybrids have since shown increased mutation rates of morphological mutants in fishes (Schwab, 1987) and of chromosomal rearrangements in Nicotiana (Gerstel & Bums, 1966, 1967, in grasshoppers (Shaw, Wilson & Coates, 1983) and in Chironomus (Hagele, 1984). Analogously, in my laboratory high frequencies of new chromosome rearrangements have been induced by introgressive hybridization between D. buzzatii and D. koepferae (Naveira & Fontdevila, 1985;Fontdevila, 1987) (Fig.…”

Section: Inbreeding As Genomic Stressmentioning

confidence: 92%

“…The production of new chromosomal rearrange- Shaw et al, 1983; (2) Hagele, 1984; (3) Sturtevant, 1939; (4) Naveira and Fontdevila, 1985; (5) Haymer and Marsh, 1986;(6) Coyne, 1989. ments at a high rate has, in some instances, been directly related to ME transposition in intraspecific hybrids. In D. melanogaster, Engels & Preston (1984) showed by in situ hybridization on polytene chromosomes that most breakpoints in dysgenic new chromosomal rearrangements occurred at or very near the sites of P element insertion; a similar observation has been made with the hobo element (see Gelbart & Blackman, 1989, and references therein).…”

Section: Interspecific Hybridization As Genomic Stressmentioning

confidence: 99%

Genetic instability and rapid speciation: are they coupled?

Fontdevila

1992

Genetica

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Models of rapid speciation by fixation of underdominant chromosomal rearrangements are constrained by multiple conditions on population structure and chromosomal performance. Realistic population conditions impose long periods of time to fixation or reproductive isolation, even under a model of accumulation of successive advantageous slightly underdominant rearrangements. However, when increased mutation rates are considered, fixation time is significantly reduced. Evidence is presented of high rates of chromosomal rearrangement production under genomic stress, such as in inbred and interspecific crosses. These episodes of high instability are most probably the result of mobile element transpositions, since transposition is also increased under genomic stress. Nonetheless, the evolutionary value of mobile elements to speed up speciation will be only significant if their mutagenic potential is activated in concert with population scenarios favorable to speciation events. Although this coupling needs to be demonstrated, many models of rapid speciation are carried out under population conditions favoring inbreeding and/or hybridization.

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“…However, in these cases, the multiple rearrangements must face the population genetic restrictions given above. Recent studies of natural or experimental hybrids have demonstrated elevated chromosomal mutation rates and multiple simultaneous events (Peters, 1982;Hagele, 1984;Naveira and Fontdevila, 1985) that are presumably precipitated by the hybridization events. Bush (1981) has proposed that transposable elements may be responsible for the above phenomena, and this is supported by studies of the hybrid dysgenesis syndrome in Drosophila melanogaster (Bregliano and Kidwell, 1983;Collins and Rubin, 1984;Engles and Preston, 1984).…”

Section: Chromosomal Speciation Modelsmentioning

confidence: 98%

Chromosomal Evolution and Speciation Revisited

1987

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Many descriptive models of chromosomal evolution have been formulated over the past two decades. We review the assumptions and predictions of these models and consider some pertinent evidence. One model of adaptive divergence, the canalization model, is difficult to test, and where predictions are explicitly stated, empirical data generally do not support the model. However, few adequate data sets are available to test this hypothesis, and it deserves further study. Several process-oriented models of chromosomal speciation are reviewed with respect to genetic isolating mechanisms, the fitness components of individual rearrangements, and the permissible population structures. From the last we attempt to estimate qualitatively the expected genetic correlates of each model to maximize its testability. Theoretical and empirical inadequacies are discussed and suggestions are made for improvement. Both phyletic and speciation models of chromosomal evolution have often been based on broad comparative studies of large taxonomic groups, but more precise testing will require multidisciplinary populationlevel studies of organisms hypothesized to be undergoing some form of chromosomally-mediated speciation or adaptive radiation.

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Different hybrid effects in reciprocal crosses betweenChironomus thummi thummi andCh. th. piger including spontaneous chromsome aberrations and sterility

Cited by 29 publications

References 11 publications

Chironomus riparius (Diptera) genome sequencing reveals the impact of minisatellite transposable elements on population divergence

Chironomus riparius (Diptera) genome sequencing reveals the impact of minisatellite transposable elements on population divergence

Genetic instability and rapid speciation: are they coupled?

Chromosomal Evolution and Speciation Revisited

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