Project description:Stalk borers are major pests for some of the most important crops in the world, such as maize or rice. Plant defense mechanisms against these herbivores have been poorly investigated. The maize´s stalk responds to insect feeding activating defense genes including hormone biosynthetic-related or proteinase inhibitor transcripts. The most outstanding conclusion is that cells in the maize´s stalk undergo cell wall fortification after corn borer tunneling. We performed a gene expression profiling to identify those genes differentially expressed in maize after infestation with the corn borer S. nonagrioides. Four genetically unrelated maize inbred lines (EP39, EP42, CM151 and PB130) were infested at VT (tasseling) developmental stage with a mass of approximately 40 eggs of S. nonagrioides laid on the sheath of the main ear. Another four biological replicates per genotype were used as control. Samples for RNA extraction were harvested fifteen days after infestation.

2011-09-30 | E-GEOD-28244 | biostudies-arrayexpress

Next generation sequencing of Coccinella septempunctata L. with non-diapause, diapause, and diapause-terminated states

Project description:The most commonÂ ladybird beetle, Coccinella septempunctata L., is an excellent predator of crop pests such as aphids and white flies, and it shows a wide range of adaptability, a large appetite and a high reproductive ability. In this study, we collected female adults in three different states, i.e., non-diapause, diapause and diapause termination, for transcriptome sequencing. The experimental insects consisted of three different states as follows: Non-diapause female insects were reared at 24Â±1Â°C, with a RH of 70Â±10% and a 16:8 h light: dark (L: D) photoperiod and collected after their first oviposition. Female adults in diapause were reared at 18Â±1Â°C at an RH of 70Â±10% and a 10:14-h (L:D) photoperiod. The experimental diapause insects were collected after 30 days. Diapause-terminated adults were transferred to another climatic cabinet with the 30-day diapause insects and reared under the same conditions as the non-diapause insects. After their first oviposition, the female insects were collected and stored at -80Â°C. Three biological replicates per treatment (non-diapause, diapause, diapause-terminated) were sequenced using Illumina HiSeq 2500.

2016-06-01 | E-GEOD-75645 | biostudies-arrayexpress

Transcriptome analysis of the litchi fruit borer (Conopomorpha sinensis)

Project description:Purpose: transcriptome sequencing of Conopomorpha sinensis Methods: high-through Illumina HiSeqTM 2000 Results:66017 transcripts,35383 unigenes Conclusions:This study provided valuable transcriptome data for the litchi fruit borer, which was the first fundamental genomic basis for exploiting gene resources from the litchi fruit borer

2018-03-03 | GSE67194 | GEO

Early transcriptional events linked to induction of diapause revealed by RNAseq in larvae of drosophilid fly, Chymomyza costata.

Project description:Diapause is an environmentally programmed and hormonally regulated period of dormancy which makes an important part of the life-cycle in many species of invertebrates. In this study, using a RNAseq approach, we focused on very early stages of diapause induction in the larvae of drosophilid fly, Chymomyza costata by characterizing global patterns of gene expression associated with photoperiodic induction of diapause.

2015-08-03 | E-MTAB-3620 | biostudies-arrayexpress

Identification of candidate odorant receptors in Asian corn borer Ostrinia furnacalis.

Project description:In lepidopteran insects, odorant receptors are involved in the perception of sex pheromones and general odorants. In the Asian corn borer, Ostrinia furnacalis, although several pheromone receptors have been identified, no general odorant receptor has been reported. In this study, an RNA sequencing analysis was carried out to identify the whole repertoire of the odorant receptors expressed in the antennae of O. furnacalis. Among 12 million reads obtained from the antennae of male and female moths, 52 candidate odorant receptors were identified, including 45 novel ones. Expression levels of candidate odorant receptors were estimated by read mapping and quantitative reverse transcription PCR. These analyses confirmed that the expression of the previously identified pheromone receptors was highly male biased. In contrast, none of the newly identified odorant receptors showed male-biased expression. Three of the newly identified odorant receptors showed female-biased expression. Two of them were the most highly expressed odorant receptors in the female antennae, suggesting that they may be involved in the detection of odorants important for the induction of female-specific behaviors such as oviposition site selection. In addition, candidate genes of 21 ionotropic receptors, 5 gustatory receptors, 2 sensory neuron membrane proteins, and 26 odorant degrading enzymes were identified. Our results provide a basis for further analysis of the chemosensory system in the Ostrinia species.

| S-EPMC4372370 | biostudies-literature

Erythrina Borer

Project description:Erythrina Borer Genome sequencing

| PRJNA841231 | ENA