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cytoplasmic incompatibility

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https://www.readbyqxmd.com/read/28097419/modelling-wolbachia-infection-in-a-sex-structured-mosquito-population-carrying-west-nile-virus
#1
József Z Farkas, Stephen A Gourley, Rongsong Liu, Abdul-Aziz Yakubu
Wolbachia is possibly the most studied reproductive parasite of arthropod species. It appears to be a promising candidate for biocontrol of some mosquito borne diseases. We begin by developing a sex-structured model for a Wolbachia infected mosquito population. Our model incorporates the key effects of Wolbachia infection including cytoplasmic incompatibility and male killing. We also allow the possibility of reduced reproductive output, incomplete maternal transmission, and different mortality rates for uninfected/infected male/female individuals...
January 17, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28064190/cytoplasmic-nuclear-incompatibility-between-wild-isolates-of-caenorhabditis-nouraguensis
#2
Piero Lamelza, Michael Ailion
How species arise is a fundamental question in biology. Species can be defined as populations of interbreeding individuals that are reproductively isolated from other such populations. Therefore, understanding how reproductive barriers evolve between populations is essential for understanding the process of speciation. Hybrid incompatibility (for example, hybrid sterility or lethality) is a common and strong reproductive barrier in nature. Here we report a lethal incompatibility between two wild isolates of the nematode Caenorhabditis nouraguensis Hybrid inviability results from the incompatibility between a maternally inherited cytoplasmic factor from each strain and a recessive nuclear locus from the other...
January 6, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28056065/wolbachia-infections-in-aedes-aegypti-differ-markedly-in-their-response-to-cyclical-heat-stress
#3
Perran A Ross, Itsanun Wiwatanaratanabutr, Jason K Axford, Vanessa L White, Nancy M Endersby-Harshman, Ary A Hoffmann
Aedes aegypti mosquitoes infected with Wolbachia bacteria are currently being released for arbovirus suppression around the world. Their potential to invade populations and persist will depend on interactions with environmental conditions, particularly as larvae are often exposed to fluctuating and extreme temperatures in the field. We reared Ae. aegypti larvae infected with different types of Wolbachia (wMel, wAlbB and wMelPop-CLA) under diurnal cyclical temperatures. Rearing wMel and wMelPop-CLA-infected larvae at 26-37°C reduced the expression of cytoplasmic incompatibility, a reproductive manipulation induced by Wolbachia...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/27997046/the-on-again-off-again-relationship-between-mitochondrial-genomes-and-species-boundaries
#4
Daniel B Sloan, Justin C Havird, Joel Sharbrough
The study of reproductive isolation and species barriers frequently focuses on mitochondrial genomes and has produced two alternative and almost diametrically opposed narratives. On one hand, mtDNA may be at the forefront of speciation events, with coevolved mitonuclear interactions responsible for some of the earliest genetic incompatibilities arising among isolated populations. On the other hand, there are numerous cases of introgression of mtDNA across species boundaries even when nuclear gene flow is restricted...
December 20, 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27982076/establishment-of-the-cytoplasmic-incompatibility-inducing-wolbachia-strain-wmel-in-an-important-agricultural-pest-insect
#5
Xiao-Fei Zhou, Zheng-Xi Li
The wMel Wolbachia strain was known for cytoplasmic incompatibility (CI)-induction and blocking the transmission of dengue. However, it is unknown whether it can establish and induce CI in a non-dipteran host insect. Here we artificially transferred wMel from Drosophila melanogaster into the whitefly Bemisia tabaci. Fluorescence in situ hybridisation demonstrated that wMel had successfully transfected the new host. Reciprocal crossing was conducted with wMel-transfected and wild-type isofemale lines, indicating that wMel could induce a strong CI without imposing significant cost on host fecundity...
December 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27974481/unc-84-linc-ing-chromosome-movement-and-double-strand-break-repair
#6
Nicola Silva, Verena Jantsch
Assaults to our DNA take place at a high frequency and are incompatible with life. In this issue, Lawrence et al. (2016. J. Cell Biol https://doi.org/10.1083/jcb.201604112) demonstrate that a novel complex links the nucleus with cytoplasmic microtubules for the promotion of DNA repair by homologous recombination.
December 19, 2016: Journal of Cell Biology
https://www.readbyqxmd.com/read/27821433/wolbachia-in-the-drosophila-yakuba-complex-pervasive-frequency-variation-and-weak-cytoplasmic-incompatibility-but-no-apparent-effect-on-reproductive-isolation
#7
Brandon S Cooper, Paul S Ginsberg, Michael Turelli, Daniel R Matute
Three hybridizing species-the clade [(Drosophila yakuba, D. santomea), D. teissieri]-comprise the yakuba complex in the D. melanogaster subgroup. Their ranges overlap on Bioko and São Tomé, islands off west Africa. All three species are infected with Wolbachia-maternally inherited, endosymbiotic bacteria, best known for manipulating host reproduction to favor infected females. Previous analyses reported no cytoplasmic incompatibility (CI) in these species. However, we discovered that Wolbachia from each species cause intraspecific and interspecific CI...
January 2017: Genetics
https://www.readbyqxmd.com/read/27734242/modeling-the-effects-of-augmentation-strategies-on-the-control-of-dengue-fever-with-an-impulsive-differential-equation
#8
Xianghong Zhang, Sanyi Tang, Robert A Cheke, Huaiping Zhu
Dengue fever has rapidly become the world's most common vector-borne viral disease. Use of endosymbiotic Wolbachia is an innovative technology to prevent vector mosquitoes from reproducing and so break the cycle of dengue transmission. However, strategies such as population eradication and replacement will only succeed if appropriate augmentations with Wolbachia-infected mosquitoes that take account of a variety of factors are carried out. Here, we describe the spread of Wolbachia in mosquito populations using an impulsive differential system with four state variables, incorporating the effects of cytoplasmic incompatibility and the augmentation of Wolbachia-infected mosquitoes with different sex ratios...
October 12, 2016: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/27721807/disentangling-a-holobiont-recent-advances-and-perspectives-in-nasonia-wasps
#9
Jessica Dittmer, Edward J van Opstal, J Dylan Shropshire, Seth R Bordenstein, Gregory D D Hurst, Robert M Brucker
The parasitoid wasp genus Nasonia (Hymenoptera: Chalcidoidea) is a well-established model organism for insect development, evolutionary genetics, speciation, and symbiosis. The host-microbiota assemblage which constitutes the Nasonia holobiont (a host together with all of its associated microbes) consists of viruses, two heritable bacterial symbionts and a bacterial community dominated in abundance by a few taxa in the gut. In the wild, all four Nasonia species are systematically infected with the obligate intracellular bacterium Wolbachia and can additionally be co-infected with Arsenophonus nasoniae...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27628851/two-sex-mosquito-model-for-the-persistence-of-wolbachia
#10
Ling Xue, Carrie A Manore, Panpim Thongsripong, James M Hyman
We develop and analyse an ordinary differential equation model to investigate the transmission dynamics of releasing Wolbachia-infected mosquitoes to establish an endemic infection in a population of wild uninfected mosquitoes. Wolbachia is a genus of endosymbiotic bacteria that can infect mosquitoes and reduce their ability to transmit some viral mosquito-transmitted diseases, including dengue fever, chikungunya, and Zika. Although the bacterium is transmitted vertically from infected mothers to their offspring, it can be difficult to establish an endemic infection in a wild mosquito population...
September 14, 2016: Journal of Biological Dynamics
https://www.readbyqxmd.com/read/27543297/genomes-of-candidatus-wolbachia-bourtzisii-wdaca-and-candidatus-wolbachia-pipientis-wdacb-from-the-cochineal-insect-dactylopius-coccus-hemiptera-dactylopiidae
#11
Shamayim T Ramírez-Puebla, Ernesto Ormeño-Orrillo, Arturo Vera-Ponce de León, Luis Lozano, Alejandro Sanchez-Flores, Mónica Rosenblueth, Esperanza Martínez-Romero
Dactylopius species, known as cochineal insects, are the source of the carminic acid dye used worldwide. The presence of two Wolbachia strains in Dactylopius coccus from Mexico was revealed by PCR amplification of wsp and sequencing of 16S rRNA genes. A metagenome analysis recovered the genome sequences of Candidatus Wolbachia bourtzisii wDacA (supergroup A) and Candidatus Wolbachia pipientis wDacB (supergroup B). Genome read coverage, as well as 16S rRNA clone sequencing, revealed that wDacB was more abundant than wDacA...
October 13, 2016: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/27530694/-darwin-s-corollary-and-cytoplasmic-incompatibility-induced-by-cardinium-may-contribute-to-speciation-in-encarsia-wasps-hymenoptera-aphelinidae
#12
Marco Gebiola, Suzanne E Kelly, Peter Hammerstein, Massimo Giorgini, Martha S Hunter
The potential importance of cytoplasmic incompatibility (CI) - inducing bacterial symbionts in speciation of their arthropod hosts has been debated. Theoretical advances have led to a consensus that a role is plausible when CI is combined with other isolating barriers. However, the insect model systems Nasonia and Drosophila are the only two experimental examples documented. Here we analyzed the components of reproductive isolation between the parasitoid wasp Encarsia suzannae, which is infected by the CI-inducing symbiont Cardinium, and its uninfected sibling species Encarsia gennaroi...
August 17, 2016: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/27498563/wolbachia-protein-tomo-targets-nanos-mrna-and-restores-germ-stem-cells-in-drosophila-sex-lethal-mutants
#13
Manabu Ote, Morio Ueyama, Daisuke Yamamoto
Wolbachia, endosymbiotic bacteria prevalent in invertebrates, manipulate their hosts in a variety of ways: they induce cytoplasmic incompatibility, male lethality, male-to-female transformation, and parthenogenesis. However, little is known about the molecular basis for host manipulation by these bacteria. In Drosophila melanogaster, Wolbachia infection makes otherwise sterile Sex-lethal (Sxl) mutant females capable of producing mature eggs. Through a functional genomic screen for Wolbachia genes with growth-inhibitory effects when expressed in cultured Drosophila cells, we identified the gene WD1278 encoding a novel protein we call toxic manipulator of oogenesis (TomO), which phenocopies some of the Wolbachia effects in Sxl mutant D...
September 12, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27414645/whole-mitochondrial-genome-sequencing-and-re-examination-of-a-cytoplasmic-male-sterility-associated-gene-in-boro-taichung-type-cytoplasmic-male-sterile-rice
#14
Tomohiko Kazama, Kinya Toriyama
Nuclear genome substitutions between subspecies can lead to cytoplasmic male sterility (CMS) through incompatibility between nuclear and mitochondrial genomes. Boro-Taichung (BT)-type CMS rice was obtained by substituting the nuclear genome of Oryza sativa subsp. indica cultivar Chinsurah Boro II with that of Oryza sativa subsp. japonica cultivar Taichung 65. In BT-type CMS rice, the mitochondrial gene orf79 is associated with male sterility. A complete sequence of the Boro-type mitochondrial genome responsible for BT-type CMS has not been determined to date...
2016: PloS One
https://www.readbyqxmd.com/read/27313167/interaction-of-wolbachia-and-bloodmeal-type-in-artificially-infected-aedes-albopictus-diptera-culicidae
#15
Eunho Suh, Yuqing Fu, David R Mercer, Stephen L Dobson
Maternally inherited Wolbachia bacteria are being introduced into vector mosquito populations, with the goal of reducing the transmission of diseases such as dengue fever. The infection dynamics of Wolbachia depends upon the ability of Wolbachia to manipulate host reproduction as well as any fitness costs imposed upon the host. Some vector mosquito species are opportunistic blood feeders, utilizing both human and nonhuman vertebrate hosts, and the effects of bloodmeal source on Wolbachia phenotype is not well understood...
June 16, 2016: Journal of Medical Entomology
https://www.readbyqxmd.com/read/27308293/wolbachia-endobacteria-in-natural-populations-of-culex-pipiens-of-iran-and-its-phylogenetic-congruence
#16
Mohsen Karami, Seyed Hassan Moosa-Kazemi, Mohammad Ali Oshaghi, Hasan Vatandoost, Mohammad Mehdi Sedaghat, Ramazan Rajabnia, Mostafa Hosseini, Naseh Maleki-Ravasan, Yousef Yahyapour, Elaheh Ferdosi-Shahandashti
BACKGROUND: Wolbachia are common intracellular bacteria that infect different groups of arthropods including mosquitoes. These bacteria modify host biology and may induce feminization, parthenogenesis, male killing and cytoplasmic incompatibility (CI). Recently Wolbachia is being nominated as a bio-agent and paratransgenic candidate to control mosquito borne diseases. METHODS: Here we report the results of a survey for presence, frequency, and phylogenetic congruence of these endosymbiont bacteria in Culex pipiens populations in Northern, Central, and Southern parts of Iran using nested-PCR amplification of wsp gene...
September 2016: Journal of Arthropod-borne Diseases
https://www.readbyqxmd.com/read/27296468/geography-has-a-greater-effect-than-wolbachia-infection-on-population-genetic-structure-in-the-spider-mite-tetranychus-pueraricola
#17
Y-T Chen, Y-K Zhang, W-X Du, P-Y Jin, X-Y Hong
Wolbachia is an intracellular symbiotic bacterium that infects various spider mite species and is associated with alterations in host reproduction, which indicates the potential role in mite evolution. However, studies of Wolbachia infections in the spider mite Tetranychus pueraricola, a major agricultural pest, are limited. Here, we used multilocus sequence typing to determine Wolbachia infection status and examined the relationship between Wolbachia infection status and mitochondrial diversity in T. pueraricola from 12 populations in China...
October 2016: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/27282489/tropical-drosophila-pandora-carry-wolbachia-infections-causing-cytoplasmic-incompatibility-or-male-killing
#18
Kelly M Richardson, Michele Schiffer, Philippa C Griffin, Siu F Lee, Ary A Hoffmann
Wolbachia infections have been described in several Drosophila species, but relatively few have been assessed for phenotypic effects. Cytoplasmic incompatibility (CI) is the most common phenotypic effect that has been detected, while some infections cause male killing or feminization, and many Wolbachia infections have few host effects. Here, we describe two new infections in a recently described species, Drosophila pandora, one of which causes near-complete CI and near-perfect maternal transmission (the "CI" strain)...
August 2016: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/27250681/calcium-signalling-mediates-self-incompatibility-response-in-the-brassicaceae
#19
Megumi Iwano, Kanae Ito, Sota Fujii, Mitsuru Kakita, Hiroko Asano-Shimosato, Motoko Igarashi, Pulla Kaothien-Nakayama, Tetsuyuki Entani, Asaka Kanatani, Masashi Takehisa, Masaki Tanaka, Kunihiko Komatsu, Hiroshi Shiba, Takeharu Nagai, Atsushi Miyawaki, Akira Isogai, Seiji Takayama
Self-incompatibility in the Brassicaceae is controlled by multiple haplotypes encoding the pollen ligand (S-locus protein 11, SP11, also known as S-locus cysteine-rich protein, SCR) and its stigmatic receptor (S-receptor kinase, SRK). A haplotype-specific interaction between SP11/SCR and SRK triggers the self-incompatibility response that leads to self-pollen rejection, but the signalling pathway remains largely unknown. Here we show that Ca(2+) influx into stigma papilla cells mediates self-incompatibility signalling...
2015: Nature Plants
https://www.readbyqxmd.com/read/27243367/wolbachia-infections-in-natural-anopheles-populations-affect-egg-laying-and-negatively-correlate-with-plasmodium-development
#20
W Robert Shaw, Perrine Marcenac, Lauren M Childs, Caroline O Buckee, Francesco Baldini, Simon P Sawadogo, Roch K Dabiré, Abdoulaye Diabaté, Flaminia Catteruccia
The maternally inherited alpha-proteobacterium Wolbachia has been proposed as a tool to block transmission of devastating mosquito-borne infectious diseases like dengue and malaria. Here we study the reproductive manipulations induced by a recently identified Wolbachia strain that stably infects natural mosquito populations of a major malaria vector, Anopheles coluzzii, in Burkina Faso. We determine that these infections significantly accelerate egg laying but do not induce cytoplasmic incompatibility or sex-ratio distortion, two parasitic reproductive phenotypes that facilitate the spread of other Wolbachia strains within insect hosts...
2016: Nature Communications
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