Topic
Lepidoptera genitalia
About: Lepidoptera genitalia is a research topic. Over the lifetime, 10114 publications have been published within this topic receiving 78876 citations. The topic is also known as: Uncus.
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19 citations
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TL;DR: The search on function of different gut inhabiting bacteria of H. armigera revealed their role in nutrition, detoxification of lethal insecticide molecules, and defensive action against pathogens.
Abstract: Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae), a polyphagous agricultural pest of global importance, harbour diverse bacterial communities in its gut. We analysed the composition and diversity of gut bacteria using Illumina Next-Generation Sequencing of 16S ribosomal RNA amplicons. The data set consisted of 864,813 high-quality paired end sequences with mean length of 150 base pairs. Highly diverse bacterial communities were present in the sample containing approximately 2303 operational taxonomic units (OTUs). A total of 17 bacterial phyla, 34 classes, 84 orders, 173 families, 334 genera, and 707 species were identified from the sequence analysis. Actinobacteria was the most dominant groups, followed by Proteobacteria and Firmicutes . The search on function of different gut inhabiting bacteria of H. armigera revealed their role in nutrition, detoxification of lethal insecticide molecules, and defensive action against pathogens. Insecticidal toxin producing bacterial species were also found associated with the H. armigera gut .
19 citations
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TL;DR: In this paper, the European corn borer, Ostrinia nubilalis (Lepidoptera: Crambidae), is selected for high levels of Cry1F resistance (>12,000-fold compared to susceptible larvae) and is capable of survival on transgenic hybrid corn.
Abstract: The European corn borer, Ostrinia nubilalis (Lepidoptera: Crambidae), is an introduced crop pest in North America that causes major damage to corn and reduces yield of food, feed, and biofuel materials. The Cry1F toxin from Bacillus thuringiensis (Bt) expressed in transgenic hybrid corn is highly toxic to O. nubilalis larvae and effective in minimizing feeding damage. A laboratory colony of O. nubilalis was selected for high levels of Cry1F resistance (>12,000-fold compared to susceptible larvae) and is capable of survival on transgenic hybrid corn. Genetic linkage maps with segregating AFLP markers show that the Cry1F resistance trait is controlled by a single quantitative trait locus (QTL) on linkage group 12. The map position of single nucleotide polymorphism (SNP) markers indicated that midgut Bt toxin-receptor genes, alkaline phosphatase, aminopeptidase N, and cadherin, are not linked with the Cry1F QTL. Evidence suggests that genes within this genome interval may give rise to a novel Bt toxin resistance trait for Lepidoptera that appears independent of known receptor-based mechanisms of resistance.
19 citations