Abstract: A recombinant protein for displaying an S protein of severe acute respiratory syndrome coronavirus 2 (SARS-COV-2), a recombinant virion, and a use thereof, as well as a recombinant gene expressing the S protein of the SARS-COV-2 are provided. The recombinant gene or the recombinant protein includes a sequence of an extracellular domain of the S protein of the SARS-COV-2 and sequences of a TMD and a CTD of an F protein of an avian paramyxovirus (APMV). The recombinant Newcastle disease virus (NDV) including this sequence has a strong ability to produce a neutralizing antibody. A recombinant gene or protein produced through the recombinant of a sequence encoding the extracellular domain of the S protein and sequences encoding the TMD and the CTD of the F protein of the APMV (except for NDV) has a great potential to become an excellent antigen candidate for Coronavirus Disease 2019 (COVID-19) vaccines.

Abstract: Embodiments of the present disclosure a video editing method and apparatus, an electronic device, and a storage medium. The method comprises: in response to the triggering operation on a text editing track segment in an editing track on a video editing interface, presenting a first text editing interface which is of the text editing track segment and comprises a text effect preview area, a text template selection area and a first text effect editing area; in response to an operation of selecting a target text template, placing a corresponding text material in the text editing track segment, and present a first text effect of the corresponding text material in the text effect preview area.

Abstract: Embodiments of the present disclosure a video editing method and apparatus, an electronic device, and a storage medium. The method comprises: in response to the triggering operation on a text editing track segment in an editing track on a video editing interface, presenting a first text editing interface which is of the text editing track segment and comprises a text effect preview area, a text template selection area and a first text effect editing area; in response to an operation of selecting a target text template, placing a corresponding text material in the text editing track segment, and present a first text effect of the corresponding text material in the text effect preview area.

Abstract: The present disclosure relates to a method for attenuating an influenza virus, an attenuated influenza virus strain and use thereof, and belongs to the technical field of attenuated vaccines. In the present disclosure, the method includes the following steps: conducting synonymous mutation on an overlap of an M2 gene and an M1 gene in an M gene of an influenza A virus, while ensuring integrity and invariance of an amino acid sequence encoded by the M1 gene; conducting mutation into termination codon and deletion of partial nucleotide sequence in a transmembrane domain of the M2 gene, and rescuing an attenuated influenza virus strain using a reverse genetic system.

Abstract: The disclosure provides an InDel marker genotype database of whole genome of Malus and use in specific identification of germplasm resources thereof, belonging to the technical field of molecular biology. The constructing method of the genotype database comprises: genotyping InDel markers of genomic DNA samples of Malus germplasm resources by using primer pairs and multiplex PCR; recording one line data for each Malus germplasm resource according to the genotype of InDel marker; collecting all germplasm resources records to obtain an InDel marker genotype database of the whole genome of Malus. The whole genome InDel marker genotype database of Malus provided by the disclosure can identify the specificity of apple germplasm simply, efficiently and stably, thus overcoming the limitation that DUS test is easily influenced by environment, and providing a powerful tool for the protection of new apple varieties and the management of germplasm resources.

Abstract: The disclosure provides an InDel marker genotype database of whole genome of Malus and use in specific identification of germplasm resources thereof, belonging to the technical field of molecular biology. The constructing method of the genotype database comprises: genotyping InDel markers of genomic DNA samples of Malus germplasm resources by using primer pairs and multiplex PCR; recording one line data for each Malus germplasm resource according to the genotype of InDel marker; collecting all germplasm resources records to obtain an InDel marker genotype database of the whole genome of Malus. The whole genome InDel marker genotype database of Malus provided by the disclosure can identify the specificity of apple germplasm simply, efficiently and stably, thus overcoming the limitation that DUS test is easily influenced by environment, and providing a powerful tool for the protection of new apple varieties and the management of germplasm resources.