摘要:
Disclosed is a method of transforming monocotyledons which necessitates only a short period from the transformation to the regeneration of a whole plant as compared with the conventional methods, thus reducing the frequency of occurrence of mutants, and can be generally applied to the plants for which any system of regenerating the whole plants from protoplasts has not been established, and in which the material to be used can be readily prepared without any particular apparatuses. The present invention provides a method for transforming monocotyledons comprising transforming scutellum of an immature embryo of a monocotyledon with a bacterium belonging to genus Agrobacterium containing a desired gene, which immature embryo has not been subjected to a dedifferentiation treatment, to obtain a transformant.
摘要:
The present invention aims to provide novel vectors for plant transformation.The vectors of the present invention are cosmid vectors having a full length of 15 kb or less characterized in that: 1) they contain an origin of replication of an IncP plasmid, but do not contain any origin of replication of other plasmid groups; 2) they contain the trfA1 gene of an IncP plasmid; 3) they contain an oriT of an IncP plasmid; 4) they contain the incC1 gene of an IncP plasmid; 5) they contain a cos site of lambda phage and the cos site is located outside the T-DNA; 6) they contain a drug resistance gene expressed in E. coli and a bacterium of the genus Agrobacterium; 7) they contain a T-DNA right border sequence of a bacterium of the genus Agrobacterium; 8) they contain a T-DNA left border sequence of a bacterium of the genus Agrobacterium; 9) they contain a selectable marker gene for plant transformation located between 7) and 8) and expressed in a plant; and 10) they contain restriction endonuclease recognition site(s) located between 7) and 8) for cloning a foreign gene.
摘要:
The present invention provides a method for selecting genomic DNA fragments which are useful for providing a plant with an agriculturally advantageous improvement.The method of the present invention comprises the steps of: 1) preparing genomic DNA from a plant, which is then cloned into a cloning vector to form a genomic DNA library; 2) introducing a genomic fragment from each of the genomic clones constituting the genomic DNA library separately into a plant to produce transgenic plants; 3) cultivating the transgenic plants or progeny thereof to select a plant exhibiting an agriculturally advantageous phenotypic variation; and 4) selecting the genomic DNA fragment, which was introduced in step (2) into the plant selected in step (3), as a purposed genomic DNA fragment.
摘要:
The present invention aims to provide novel vectors for plant transformation.The vectors of the present invention are cosmid vectors having a full length of 15 kb or less characterized in that: 1) they contain an origin of replication of an IncP plasmid, but do not contain any origin of replication of other plasmid groups; 2) they contain the trfA1 gene of an IncP plasmid; 3) they contain an oriT of an IncP plasmid; 4) they contain the incC1 gene of an IncP plasmid; 5) they contain a cos site of lambda phage and the cos site is located outside the T-DNA; 6) they contain a drug resistance gene expressed in E. coli and a bacterium of the genus Agrobacterium; 7) they contain a T-DNA right border sequence of a bacterium of the genus Agrobacterium; 8) they contain a T-DNA left border sequence of a bacterium of the genus Agrobacterium; 9) they contain a selectable marker gene for plant transformation located between 7) and 8) and expressed in a plant; and 10) they contain restriction endonuclease recognition site(s) located between 7) and 8) for cloning a foreign gene.
摘要:
The present invention provides a method for selecting genomic DNA fragments which are useful for providing a plant with an agriculturally advantageous improvement. The method of the present invention comprises the steps of: 1) preparing genomic DNA from a plant, which is then cloned into a cloning vector to form a genomic DNA library; 2) introducing a genomic fragment from each of the genomic clones constituting the genomic DNA library separately into a plant to produce transgenic plants; 3) cultivating the transgenic plants or progeny thereof to select a plant exhibiting an agriculturally advantageous phenotypic variation; and 4) selecting the genomic DNA fragment, which was introduced in step (2) into the plant selected in step (3), as a purposed genomic DNA fragment.
摘要:
An object of the present invention is to provide a method of gene introduction, which can transform a Hordeum plant at a higher efficiency compared to that in known Agrobacterium methods, and a method of producing a transformed Hordeum plant. The method of the invention includes a step of subjecting an immature embryo tissue of a Hordeum plant to centrifugation treatment and/or pressurization treatment before the inoculation with Agrobacterium, during the coculture step, and/or after the coculture step, and is characterized in that the coculture medium satisfies at least one of a) containing an antiauxin; b) containing a cytokinin; and c) containing a phenoxy auxin in an amount of less than 2 μM and/or a benzoic auxin in an amount of less than 5 μM, or not containing any phenoxy auxin and/or benzoic auxin.
摘要:
A method for gene transfer by which higher efficiency for gene transfer than that by the conventional Agrobacterium method may be attained simply and without injuring the tissue is disclosed. According to the method of the present invention, the efficiency of gene transfer into plant cells by a bacterium belonging to genus Agrobacterium is promoted by accompanying heat treatment and centrifugation treatment of the plant cells or plant tissue.
摘要:
An Agrobacterium-mediated method for producing transformed maize or rice, culturing an Agrobacterium-inoculated immature embryo with a coculture medium and a regeneration step for culturing the immature embryo with a regeneration medium either without callus growth or after callus growth culture to regenerate whole transformed maize or rice. The method further includes a transformation enhancement and the method does not include any selection step based on the properties of a nucleic acid to be introduced by Agrobacterium in any step from coculture to regeneration.
摘要:
The method of the present invention includes the step of excising one or more portions selected from a radicle, a germ, and an embryonic axis of a plant tissue inoculated with Agrobacterium after cultivation in a coculture medium. The present invention provides a method of gene introduction that can transform a Triticum plant at high efficiency compared to conventionally known Agrobacterium methods, and provides a method of producing a transformed plant.
摘要:
The present invention provides a method for Agrobacterium-mediated gene transfer into a plant material, which comprises inoculating an Agrobacterium into the plant material in the presence of a powder. In the method of the present invention, the powder at least does not affect living tissues and has one or more properties selected from the group consisting of: being insoluble in water; having an affinity for living tissues; having adsorption properties; and having a surface polarity. The present invention also provides a method for producing a transformed plant, which comprises using the gene transfer method of the present invention.