| 11. |
- Coates, Brad S., et al.
(författare)
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A draft Diabrotica virgifera virgifera genome : insights into control and host plant adaption by a major maize pest insect
- 2023
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Ingår i: BMC Genomics. - : Springer Science and Business Media LLC. - 1471-2164. ; 24:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Adaptations by arthropod pests to host plant defenses of crops determine their impacts on agricultural production. The larval host range of western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae), is restricted to maize and a few grasses. Resistance of D. v. virgifera to crop rotation practices and multiple insecticides contributes to its status as the most damaging pest of cultivated maize in North America and Europe. The extent to which adaptations by this pest contributes to host plant specialization remains unknown. Results: A 2.42 Gb draft D. v. virgifera genome, Dvir_v2.0, was assembled from short shotgun reads and scaffolded using long-insert mate-pair, transcriptome and linked read data. K-mer analysis predicted a repeat content of ≥ 61.5%. Ortholog assignments for Dvir_2.0 RefSeq models predict a greater number of species-specific gene duplications, including expansions in ATP binding cassette transporter and chemosensory gene families, than in other Coleoptera. A majority of annotated D. v. virgifera cytochrome P450s belong to CYP4, 6, and 9 clades. A total of 5,404 transcripts were differentially-expressed between D. v. virgifera larvae fed maize roots compared to alternative host (Miscanthus), a marginal host (Panicum virgatum), a poor host (Sorghum bicolor) and starvation treatments; Among differentially-expressed transcripts, 1,908 were shared across treatments and the least number were between Miscanthus compared to maize. Differentially-expressed transcripts were enriched for putative spliceosome, proteosome, and intracellular transport functions. General stress pathway functions were unique and enriched among up-regulated transcripts in marginal host, poor host, and starvation responses compared to responses on primary (maize) and alternate hosts. Conclusions: Manual annotation of D. v. virgifera Dvir_2.0 RefSeq models predicted expansion of paralogs with gene families putatively involved in insecticide resistance and chemosensory perception. Our study also suggests that adaptations of D. v. virgifera larvae to feeding on an alternate host plant invoke fewer transcriptional changes compared to marginal or poor hosts. The shared up-regulation of stress response pathways between marginal host and poor host, and starvation treatments may reflect nutrient deprivation. This study provides insight into transcriptomic responses of larval feeding on different host plants and resources for genomic research on this economically significant pest of maize.
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| 14. |
- Hu, S., et al.
(författare)
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Dynamic-measurement modeling of attitude motion for N-bodies spacecraft with applications
- 2011
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Ingår i: Proceedings of the 30th Chinese Control Conference. - 9789881725592 ; , s. 1453-1458
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Konferensbidrag (refereegranskat)abstract
- Modeling analysis technique is one of the most important means in processing spaceflight mission. In this paper, the graph based description is given, and a series of dynamic-measurement system models are built for the attitude motion of a N-bodies spacecraft, which include the states evolvement equation of the main body, the states evolvement equations of the accessories, the inertia based measurement equations and the celestial bodies based measurement equation and the GPS based measurement equations of attitudes of the N-bodies etc.. These models are educed with some typical methods of theoretical analysis and dynamic description and are simplified into linearized discrete equations. At the end of the paper some valuable applications are pointed out.
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| 15. |
- Hu, Shaolin, et al.
(författare)
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Fault-tolerant algorithm of signal reconstruction in computer controlled systems
- 2006
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Ingår i: Xitong Fangzhen Xuebao / Journal of System Simulation. - 1004-731X. ; 18:SUPPL. 2, s. 841-843
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Tidskriftsartikel (refereegranskat)abstract
- Signal reconstruction is an important step in communication between the computer controlled system and computer system. Based on the famous Shannon reconstructing theory, some classical algorithms (such as ZOH algorithm and 1-order reconstruction algorithm, etc.) were analyzed and some shortages of these algorithms were pointed out. And, a new practical 1-step fault-tolerant prediction algorithm was set up. In order to realize this fault-tolerant algorithm, the three-points-interpolation algorithm was combined into the reconstruction process. This new algorithm has the ability to overcome bad influence from outliers and has very simple computing complexity. So, this algorithm can be safely used in on-line control.
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