Abstract: A method for gene introduction by which higher efficiency for gene introduction 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 introduction into plant cells by a bacterium belonging to genus Agrobacterium is promoted by accompanying centrifugation of the plant cells or plant tissue.

Abstract: A method for gene introduction by which higher efficiency for gene introduction 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 introduction into plant cells by a bacterium belonging to genus Agrobacterium is promoted by accompanying centrifugation of the plant cells or plant tissue.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method for gene introduction by which higher efficiency for gene introduction 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 introduction into plant cells by a bacterium belonging to genus Agrobacterium is promoted by accompanying centrifugation of the plant cells or plant tissue.

Abstract: The present invention aims to provide a novel Agrobacterium-mediated method for producing a transformed plant. The method of the present invention is an Agrobacterium-mediated method for producing a transformed plant, which comprises: (i) a coculture step for culturing an Agrobacterium-inoculated plant material with a coculture medium; and (ii) a regeneration step for culturing the tissue obtained in (i) with a regeneration medium, either without callus growth culture or after callus growth culture, to thereby regenerate a whole plant, wherein 1) said method comprises transformation enhancement, and wherein 2) said method does not comprise selection of transformed cells based on the properties of a nucleic acid to be introduced by Agrobacterium in any step from coculture to regeneration.

Abstract: The present invention aims to provide a novel Agrobacterium-mediated method for producing a transformed plant. In the transformation method of the present invention, one of the features is to comprise (i) a coculture step for culturing an Agrobacterium-inoculated plant tissue with a coculture medium containing 3,6-dichloro-o-anisic acid, 4-amino-3,5,6-trichloropicolinic acid and/or 2,4,5-trichlorophenoxyacetic acid, and (ii) a regeneration step for culturing the tissue obtained (i) with a regeneration medium containing a selective drug to thereby induce regeneration, wherein said method does not comprise, between the coculture step and the regeneration step, any selection step for culturing the cocultured tissue with an auxin-containing medium to select a transformant by drug selection.

Abstract: 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.

Abstract: The present invention aims to provide a method for increasing transformation efficiency in plants when compared to conventionally known Agrobacterium-mediated methods. In the present invention, one of the features is to comprise a coculture step for culturing an Agrobacterium-inoculated plant tissue with a coculture medium containing 3,6-dichloro-o-anisic acid.

Abstract: The purpose of the present invention is to provide the rice restorer gene to the rice BT type cytoplasmic male sterility. The gene of the present invention comprises a nucleic acid encoding the amino acid sequence of SEQ ID NO. 75, or an amino acid sequence which is identical to at least 70% of the amino acid sequence of SEQ ID NO. 75, and which functions to restore fertility. Preferably, the gene of the present invention has the base sequence of SEQ ID NOS:69-74, 80-85 or the bases 43907-46279 of SEQ ID NO:27.

Abstract: 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.

Abstract: The purpose of the present invention is to provide a method for providing and inhibiting the rice fertility to the rice BT type cytoplasmic male sterility, and discerning the presence of the rice restorer gene. The present invention employs a nucleic acid having the base sequence of SEQ ID NO.27, or a nucleic acid having a base sequence which is identical to at least 70% of the base sequence of SEQ ID NO.27, and which functions to restore fertility. Alternatively, a nucleic acid having the base sequence of bases 38538-54123 of SEQ ID NO.27, or having a base sequence which is identical to at least 70% of the base sequence of bases 38538-54123 of SEQ ID NO.27, and which functions to restore fertility, is used.

Abstract: The purpose of the present invention is to provide the rice restorer gene to the rice BT type cytoplasmic male sterility. The gene of the present invention comprises a nucleic acid encoding the amino acid sequence of SEQ ID NO.75, or an amino acid sequence which is identical to at least 70% of the amino acid sequence of SEQ ID NO.75, and which functions to restore fertility. Preferably, the gene of the present invention has the base sequence of SEQ ID NOS:69-74, 80-85 or the bases 43907-46279 of SEQ ID NO:27.

Abstract: Vectors for transforming plants with the use of agrobacteria which have been modified so as to elevate the possibility of the recognition of the border sequences of the vectors by vir proteins of the agrobacteria, thereby lowering the possibility of the transfer of DNAs other than T-DNA into plant chromosomes. More particularly, the above-vectors are those to be used in transforming plants which have right and left border sequences which can be recognized by the vir proteins of the agrobacteria, a T-DNA sequence which is located between these border sequences and into which a gene to be transferred into plants can be inserted, and a replication origin enabling the replication of the vectors in bacteria, characterized by having a plural number of left border sequences.

Abstract: The invention relates to a method for transforming a monocotyledonous plant. The time required from transformation to regeneration of a plant is shorter using the inventive method so that the frequency of emergence of mutants is smaller than the conventional methods. The inventive method may be generally applied even to the plants for which a regeneration method from a protoplast to a plant has not been established, and with which the preparation of the material to be subjected to the method is easy.

Abstract: A method for transforming a monocotyledon by which the time required from transformation to regeneration of a plant is shorter so that the frequency of emergence of mutants is smaller than the conventional methods, which may be generally applied even to the plants for which the regeneration method from a protoplast to a plant has not been established, and with which the preparation of the material to be subjected to the method is easy.

Abstract: A method for transforming Indica rice with a high efficiency is disclosed. In the method of the present invention, immature embryo cells of Indica rice are transformed by Agrobacterium method, and the transformed cells are selected. As the medium for selecting the transformed cells, a medium containing 2000 to 4000 mg/l of KNO3, 60 to 200 mg/l of MgSO4, 200 to 600 mg/l of KH2PO4, 100 to 450 mg/l of CaCl2, 200 to 600 mg/l of (NH4)2.SO4, 1 to 7 mg/l of H3BO3, 2 to 20 mg/l of MnSO4, 20 to 50 mg/l of EDTA or a salt thereof, 3 to 8 mg/l of Fe, 50 to 200 mg/l of myoinositol, 0.5 to 10 mg/l of 2,4-dichlorophenoxyacetic acid, 0.01 to 5 mg/l of a cytokinin, 5000 to 80,000 mg/l of a sugar, and a gelling agent, which medium has a pH of 4.5 to 6.5, is used.

Abstract: The invention provides a method for transforming a plant through a bacterium belonging to genus Agrobacterium, comprising transforming plant cells simultaneously with a first T-DNA (1) and a second T-DNA (2); and selecting the cells which acquired drug resistance; the first T-DNA (1) containing a gene giving the drug resistance, which functions in the plant; the second T-DNA (2) containing a desired DNA fragment to be introduced into the plant, the second T-DNA (2) being contained in a hybrid vector; the hybrid vector being prepared by homologous recombination between an acceptor vector and an intermediate vector in the bacterium belonging to genus Agrobacterium; the acceptor vector containing at least (a) a DNA region having a function to replicate a plasmid in the bacterium belonging to genus Agrobacterium and Escherichia coli, (b) a DNA region containing virB gene and virG gene in virulence region of Ti plasmid pTiBo542 of Agrobacterium tumefaciens, and (c) a DNA region which is homologous with a part of t