Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
18
datasets available to search
ShareScore release 0.7.1
Dataset results
18 results for “Male-killing”
Data from: Two male-killing Wolbachia from Drosophila birauraia that are closely related but distinct in genome structure
<p><a>Insects </a>harbour diverse maternally inherited bacteria and viruses, some of which have evolved to kill the male progeny of their hosts (male killing: MK). The fly species <em>Drosophila biauraria</em> carries a maternally transmitted MK-inducing partiti-like virus, but it was unknown if it carries other MK-inducing endosymbionts. Here, we identified two male-killing <em>Wolbachia</em> strains (<em>w</em>Biau1 and <em>w</em>Biau2) from <em>D. biauraria</em> and compared their genomes to elucidate their evolutionary processes. The two strains were genetically closely related but had exceptionally different genome structures with considerable rearrangements compared with combinations of other <em>Wolbachia</em> strains. Despite substantial changes in the genome structure, the two <em>Wolbachia</em> strains did not experience gene losses that would disrupt the male-killing expression or persistence in the host population. The two <em>Wolbachia</em>-infected matrilines carried distinct mitochondrial haplotypes, suggesting that <em>w</em>Biau1 and <em>w</em>Biau2 have invaded <em>D. biauraria</em> independently and undergone considerable genome changes owing to unknown selective pressures in evolutionary history. This study demonstrated the presence of three male-killers from two distinct origins in one fly species and highlighted the diverse and rapid genome evolution of MK <em>Wolbachia </em>in the host.</p>
Impacts of male-killing Spiroplasma on the metabolic rate and ectoparasite resistance capacity (endurance) of Drosophila
<p>Ectoparasitic mites are hypothesized to horizontally transmit bacterial endosymbionts, especially male-killing Spiroplasma. In this study we test how <em>Spiroplasma poulsonii </em>MSRO affects fly physiology and behaviour, and potential mite interactions.</p>
Data from: Two male-killing Wolbachia from Drosophila birauraia that are closely related but distinct in genome structure
Open the record for dataset details and reuse information.
Impacts of male-killing Spiroplasma on the metabolic rate and ectoparasite resistance capacity (endurance) of Drosophila
Open the record for dataset details and reuse information.
Data from: Silence of the killers: discovery of male-killing suppression in a rearing strain of the small brown planthopper, Laodelphax striatellus
<p>According to evolutionary theory, sex ratio distortions caused by reproductive parasites such as <i>Wolbachia</i> and <i>Spiroplasma</i> are predicted to be rapidly normalised by the emergence of host nuclear suppressors. However, such processes in the evolutionary arms race are difficult to observe because sex ratio biases will be promptly hidden and become superficially unrecognisable. The evolution of genetic suppressors has been reported in just two insect species so far. In the small brown planthopper,<i> Laodelphax striatellus</i>,<i> </i>female-biases caused by <i>Spiroplasma</i>, which is a 'late' male-killer, have been found in some populations. During the continuous rearing of <i>L. striatellus</i>, we noticed that a rearing strain had a 1:1 sex ratio even though it harboured <i>Spiroplasma</i>. Through introgression crossing experiments with a strain lacking suppressors, we revealed that the <i>L. striatellus</i> strain had the zygotic male-killing suppressor acting as a dominant trait. The male-killing phenotype was hidden by the suppressor even though<i> Spiroplasma</i> retained its male-killing ability. This is the first study to demonstrate the existence of a late male-killing suppressor and its mode of inheritance. Our results, together with those of previous studies, suggest that the inheritance modes of male-killing suppressors are similar regardless of insect order or early or late male-killing.</p>
Data from: Low temperature reveals genetic variability against male-killing Spiroplasma in Drosophila melanogaster natural populations
Spiroplasma endosymbionts are maternally inherited microorganisms which infect many arthropod species. In some Drosophila species, it acts as a reproductive manipulator, spreading in populations by killing the sons of infected mothers. Distinct Drosophila melanogaster populations from Brazil exhibit variable male-killing Spiroplasma prevalences. In this study, we investigated the presence of variability for the male-killing phenotype among Drosophila and/or Spiroplasma strains and verified if it correlates with the endosymbiont prevalence in natural populations. For that, we analyzed the male-killing expression when Spiroplasma strains from different populations were transferred to a standard D. melanogaster line (Canton-S) and when a common Spiroplasma strain was transferred to different wild-caught D. melanogaster lines, both at optimal and challenging temperatures for the bacteria. No variation was observed in the male-killing phenotype induced by different Spiroplasma strains. No phenotypic variability among fly lines was detected at optimal temperature (23 °C), as well. Conversely, significant variation in the male-killing expression was revealed among D. melanogaster lines at 18.5 °C, probably caused by imperfect transmission of the endosymbiont. Distinct lines differed in their average sex ratios as well as in the pattern of male-killing expression as the infected females aged. Greater variation occurred among lines from one locality, although there was no clear correlation between the male-killing intensity and the endosymbiont prevalence in each population. Imperfect transmission or male killing may also occur in the field, thus helping to explain the low or intermediate prevalences reported in nature. We discuss the implications of our results for the dynamics of male-killing Spiroplasma in natural populations.
Data from: Identification of an early male-killing agent in the oriental tea tortrix, Homona magnanima
Arthropods are frequently infected with inherited symbionts, which sometimes confer fitness benefits on female hosts or manipulate host reproduction. Early male killing, in which infected males die during embryogenesis, is induced by some bacteria, such as Wolbachia and Spiroplasma. A female-biased sex ratio has been found in Homona magnanima, collected from a tea plantation in Japan. Here, we examined the male-killing trait in H. magnanima and identified the agent that induces early male killing. The sex ratio distortion (SR) strain produced only females and no males, and its egg hatch rate was significantly lower than that of the normal (N) strain. The N strain was infected with only Wolbachia, whereas the SR strain was infected with both Wolbachia and Spiroplasma. Antibiotic treatment with 0.10% tetracycline restored the 1:1 sex ratio in the SR strain. Females treated with 0.05% tetracycline were positive for Spiroplasma but not for Wolbachia and showed a female-biased sex ratio, whereas Wolbachia-positive females did not revert to male killing. When inoculated with a homogenate of the SR strain female, females infected with only Spiroplasma produced female-biased offspring. Sequence analysis of the 16S rRNA gene revealed that Spiroplasma sp. of H. magnanima belonged to the ixodetis clade. These results indicate that Spiroplasma was responsible for male killing in H. magnanima. Late male killing is induced in H. magnanima by an RNA-like virus, and therefore this is the first case in which different male-killing agents expressed at different times in the life cycle have been found within one host species.
Data from: Silence of the killers: discovery of male-killing suppression in a rearing strain of the small brown planthopper, Laodelphax striatellus
Open the record for dataset details and reuse information.
Data from: Identification of an early male-killing agent in the oriental tea tortrix, Homona magnanima
Open the record for dataset details and reuse information.
Data from: Hologenomic speciation: synergy between a male-killing bacterium and sex-linkage creates a ‘magic trait’ in a butterfly hybrid zone
Open the record for dataset details and reuse information.
Data from: Maintenance of a male-killing Wolbachia in Drosophila innubila by male-killing dependent and male-killing independent mechanisms
Open the record for dataset details and reuse information.
Data from: Low temperature reveals genetic variability against male-killing Spiroplasma in Drosophila melanogaster natural populations
Open the record for dataset details and reuse information.
Data from: Influences of two coexisting endosymbionts, CI-inducing Wolbachia and male-killing Spiroplasma, on the performance of their host Laodelphax striatellus (Hemiptera: Delphacidae)
The small brown planthopper Laodelphax striatellus (Hemiptera: Delphacidae) is reported to have the endosymbiont Wolbachia, which shows a strong cytoplasmic incompatibility (CI) between infected males and uninfected females. In the 2000s, female-biased L. striatellus populations were found in Taiwan, and this sex ratio distortion was the result of male-killing induced by the infection of another endosymbiont, Spiroplasma. Spiroplasma infection is considered to negatively affect both L. striatellus and Wolbachia because the male-killing halves the offspring of L. striatellus and hinders the spread of Wolbachia infection via CI. Spiroplasma could have traits that increase the fitness of infected L. striatellus and/or coexisting organisms because the coinfection rates of Wolbachia and Spiroplasma were rather high in some areas. In this study, we investigated the influences of the infection of these two endosymbionts on the development, reproduction and insecticide resistance of L. striatellus in the laboratory. Our results show that the single infection of Spiroplasma had a negative influence on the fertility of L. striatellus, while the double infection state had no significant influence. At late nymphal and adult stages, the abundance of Spiroplasma was lower in the double infection state than in the single infection state. In the double infection state, the reduction of Spiroplasma density may be caused by competition between the two endosymbionts, and the negative influence of Spiroplasma on the fertility of host may be relieved. The resistance of L. striatellus to four insecticides was compared among different infection states of endosymbionts, but Spiroplasma infection did not contribute to increased insecticide resistance. Because positive influences of Spiroplasma infection were not found in terms of the development, reproduction and insecticide resistance of L. striatellus, other factors improving the fitness of Spiroplasma-infected L. striatellus may be related to the high frequency of double infection in some L. striatellus populations.
Data from: Loss of reproductive parasitism following transfer of male-killing Wolbachia to Drosophila melanogaster and Drosophila simulans
Wolbachia manipulates insect host biology through a variety of means that result in elevated fitness of infected females, enhancing its own transmission. A Wolbachia strain (wInn) naturally infecting D. innubila induces male-killing, while native strains of D. melanogaster and D. simulans usually induce cytoplasmic incompatibility (CI). In this study, we transferred wInn to D. melanogaster and D. simulans by embryonic microinjection, expecting conservation of the male-killing phenotype to the novel hosts, which are more suitable for genetic analysis. In contrast to our expectations, there was no effect on offspring sex ratio. Furthermore, no CI was observed in the transinfected flies. Overall, transinfected D. melanogaster lines displayed lower transmission rate and lower densities of Wolbachia than transinfected D. simulans lines, in which established infections were transmitted with near-perfect fidelity. In D. simulans, strain wInn had no effect on fecundity and egg to adult development. Surprisingly, one of the two transinfected lines tested showed increased longevity. We discuss our results in the context of host-symbiont co-evolution and the potential of symbionts to invade novel host species.
Data from: The value of an egg: resource reallocation in ladybirds (Coleoptera: Coccinellidae) infected with male-killing bacteria
Open the record for dataset details and reuse information.
Data from: Whole-chromosome hitchhiking driven by a male-killing endosymbiont
Open the record for dataset details and reuse information.
Data from: Influences of two coexisting endosymbionts, CI-inducing Wolbachia and male-killing Spiroplasma, on the performance of their host Laodelphax striatellus (Hemiptera: Delphacidae)
Open the record for dataset details and reuse information.
Data from: Loss of reproductive parasitism following transfer of male-killing Wolbachia to Drosophila melanogaster and Drosophila simulans
Open the record for dataset details and reuse information.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.