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15 results for “Laodelphax striatellus”
Figure 2 in Autophagic chemicals effect to Atg8 and rice stripe virus relative expressions, and Wolbachia relative density in Laodelphax striatellus (Hemiptera: Delphacidae)
Figure 2. Comparison of Atg8, Wolbachia, and RSV relative expressions and densities. Vertical bar lines indicate the ± of SD. Significant difference was determined by the Student's t-tests accompanied by Bonferroni correction (0.05). Control was used as a reference. Asterisks represent a significant difference in genes between treatment and control (*p <0.05).
Figure 1 in Autophagic chemicals effect to Atg8 and rice stripe virus relative expressions, and Wolbachia relative density in Laodelphax striatellus (Hemiptera: Delphacidae)
Figure 1. Comparison of Atg8, Wolbachia, and RSV relative expressions and densities. Vertical bar lines indicate the ± of SD. Significant difference was determined by the Student's t-tests accompanied by Bonferroni correction (0.05). Control was used as a reference. Asterisks represent a significant difference in genes between treatment and control (*p <0.05).
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: Genetic variation and phylogeographic structure of Laodelphax striatellus in China based on microsatellite markers
<p>The small brown planthopper (SBPH)<i><span>, </span></i><i><span>Laodelphax striatellus</span></i> (Fallén) (Hemiptera: Delphacidae), is an important agricultural pest that has caused serious economic losses in the major rice-producing areas of China. To effectively manage this insect pest, we analyzed its genetic variation, genetic structure and population demographic history. We used nine nuclear microsatellite loci to investigate the genetic diversity and population genetic structure of SBPH at 43 sampling sites in China. High levels of genetic diversity and genetic differentiation among most populations were detected. Overall, neighbour-joining dendrograms, STRUCTURE and principal coordinate analysis (PCoA) revealed no genetically distinct groups and exhibited an admixed phylogeographic structure in China. Isolation by distance (IBD) and spatial autocorrelation analyses demonstrated no correlation between genetic distance and geographic distance. On the other hand, bottleneck analysis indicated that SBPH populations had not undergone severe bottleneck effects in these regions. This study provides useful data for resolving the genetic relationships and migration patterns of SBPH and thus contribute to developing effective management strategies for this pest.</p>
Data from: Evidence for high dispersal ability and mito-nuclear discordance in the small brown planthopper, Laodelphax striatellus
Understanding dispersal ability in pest species is critical for both theoretical aspects of evolutionary and population biology and from a practical standpoint, such as implementing effective forecasting systems. The small brown planthopper (SBPH), Laodelphax striatellus (Fallén), is an economically important pest, but few data exist on its dispersal ability. Here, we used mitochondrial and nuclear markers to elucidate the population genetic structure of SBPH and of the parasitic bacterium Wolbachia throughout temperate and subtropical China. Our results showed that the SBPH populations in China lack significant differences in genetic structure, suggesting extensive gene flow. Multilocus sequence typing revealed that Wolbachia infection was systematic and due to the same strain (wStri) within and across populations. However, the mtDNA haplogroups had a nonrandom distribution across the sampling localities, which correlated to latitudinal and climatic gradients. We explain this mito-nuclear discordance as a result of historical population recolonization or mitochondria adaptation to climate.
Data from: Silence of the killers: discovery of male-killing suppression in a rearing strain of the small brown planthopper, Laodelphax striatellus
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Data from: Evidence for high dispersal ability and mito-nuclear discordance in the small brown planthopper, Laodelphax striatellus
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Data from: Genetic variation and phylogeographic structure of Laodelphax striatellus in China based on microsatellite markers
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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.
Figure 3 in Autophagic chemicals effect to Atg8 and rice stripe virus relative expressions, and Wolbachia relative density in Laodelphax striatellus (Hemiptera: Delphacidae)
Figure 3. Autophagic chemicals affect comparison on L. striatellus for three days. Each data point represents the average of four replications. Vertical bar lines indicate the ± of SD. The significant differences among the treatments are indicated by different letters (one-way ANOVA p <0.01 and Tukey's comparison test).
Data from: Influences of two coexisting endosymbionts, CI-inducing Wolbachia and male-killing Spiroplasma, on the performance of their host Laodelphax striatellus (Hemiptera: Delphacidae)
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Whole transcriptome analysis of coding and non-coding RNAs associated with RBSDV infection in Laodelphax striatellus (Fallén) midgut
GEO Series GSE153102. Laodelphax striatellus. 6 samples. Type: Non-coding RNA profiling by high throughput sequencing.
Differentially expressed miRNAs between the ovaries of Wolbachia-infected and Wolbachia-uninfected Laodelphax striatellus
GEO Series GSE281742. Laodelphax striatellus. 6 samples. Type: Non-coding RNA profiling by high throughput sequencing.
Identification and profiling of microRNAs in the midgut of Laodelphax striatellus after rice black-streaked dwarf virus (RBSDV) infection
GEO Series GSE315017. Laodelphax striatellus. 6 samples. Type: Non-coding RNA profiling by high throughput sequencing.
Transcriptomic analysis of the mechanism of detoxification metabolism induced by β-asarone in Laodelphax striatellus (Fallén)
GEO Series GSE272249. Laodelphax striatellus. 6 samples. Type: Expression profiling by high throughput sequencing.
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