Construction of Mutant Population and Analysis of Dwarf Mutants in "6421"(Capsicum annuum L.)through EMS Mutagenesis

[Objective] The aim was to improve the genetic property of peppers, the mutant population of Capsicum annuum L cultivar ＂6421＂ was constructed. [Method] The seeds of ＂6421＂ were treated with 0.2% to 1.2% ethyl methane sulfonate to identified LD50, and then 10 000 LD^o of treated seeds were sowed to construct mutant population. The agronomic characters and genetic regularity of dwarf mutants in M4 generation were analyzed. [Result] Our results showed that GR and SSR were 45.2% and 40.2% respectively at 1.0% EMS, close to LD50, with GI （17.6） and seed Ⅵ （19.7） being half of that of control; 562 M4 mutants were identified in 2015, and the mutation could be characterized according 11 major categories and 32 subcategories; Simultaneously, we found that plant height, plant width, diameter of mainstem, length of main-stem, the number of main-stem nodes and branch of lines E29, E58, E142 and E312 were all significantly different from that of the control. The mutation of lines E29, E58 and E312 was all controlled by a single recessive gene. [Conclusionl The study first created a pepper mutant population, which provides not only the germplasm resources for further breeding but also direct and effective materials for genomic study of the pepper.

Unmanned Technology-Based Civil-Military Intelligent Logistics System:From Construction to Integration

The stockpiling,delivery,and provision of emergency material were in the public gaze of millions of people when the coronavirus disease 2019(COVID-19)broke out.Civil-military integra-tion emergency logistics silently opened up the“second battlefield”of anti-epidemic,and estab-lished a lifeline under that emergency situation.Research on the construction of civil-military integ-rated logistics system plays an extremely important role and occupies a significant position in en-suring social stability and security as well as the stable development of social economy in China.The modern economy driven by the Internet,Internet of Things,and big data demonstrates a rap-id growing trend calling for efficient,fast,and convenient logistics.It is urgent to upgrade or build an intelligent logistics system with intelligent technology and unmanned technology as the core to meet the international and domestic market demand.As mentioned above,this paper analyzes and expounds the construction problem and practical significance of civil-military integration emer-gency logistics system based on unmanned technology,and puts forward the strategy of construct-ing civil-military integration emergency logistics system with unmanned technology under the new system.

Construction Process Simulation and Safety Analysis Based on Building Information Model and 4D Technology

Time-dependent structure analysis theory has been proved to be more accurate and reliable compared to commonly used methods during construction. However, so far applications are limited to partial period and part of the structure because of immeasurable artificial intervention. Based on the building informa-tion model (BIM) and four-dimensional (4D) technology, this paper proposes an improves structure analysis method, which can generate structural geometry, resistance model, and loading conditions automatically by a close interlink of the schedule information, architectural model, and material properties. The method was applied to a safety analysis during a continuous and dynamic simulation of the entire construction process. The results show that the organic combination of the BIM, 4D technology, construction simulation, and safety analysis of time-dependent structures is feasible and practical. This research also lays a foundation for further researches on building lifecycle management by combining architectural design, structure analysis, and construction management.