Abstract:
The present invention relates to methods for improving the transformation frequency of Agrobacterium-mediated transformation of maize embryos. A preferred method for transforming maize using Agrobacterium comprises the steps of: contacting at least one immature embryo from a maize plant with Agrobacterium capable of transferring at least one gene to said embryo; co-cultivating the embryos with Agrobacterium; culturing the embryos in medium comprising N6 salts, an antibiotic capable of inhibiting the growth of Agrobacterium, and a selective agent to select for embryos expressing the gene; and regenerating plants expressing the gene.
Abstract:
Compositions and methods for the efficient transformation and regeneration of monocot plants are provided. The methods of transformation involve infection with Agrobacterium. In this manner, any gene of interest can be introduced into the monocot plant with high transformation efficiency and in low copy number. Transformed and regenerated monocot cells, tissues, plants, and seed are also provided. The invention encompasses regenerating transformed plants, transgenic seeds produced therefrom, and transgenic plants and transgenic seeds from subsequent generations.
Abstract:
The present invention provides assays and methods for efficiently testing a polynucleotide of interest for a phenotype in a root. In some embodiments, the assays and methods include regenerating green tissue that is transgenic for at least one polynucleotide of interest into one or more transgenic plantlets that have at least one transgenic root. Further provided are methods of making a root assay by contacting green tissue with a first rooting medium to produce a plantlet and a plurality of roots. Additionally provided are methods of assaying for insecticidal activity on a live root. Accordingly provided herein is a substantially contamination-free, root bioassay. Further provided are methods of identifying a promoter having activity in a root.
Abstract:
A novel double haploid maize line designated PH17AW and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing double haploid maize line PH17AW with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH17AW through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the double haploid line PH17AW or a trait conversion of PH17AW with another maize line. Inbred maize lines derived from double haploid maize line PH17AW, methods for producing other inbred maize lines derived from double haploid maize line PH17AW and the inbred maize lines and their parts derived by those methods.
Abstract:
A novel double haploid maize line designated PHWVZ and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing double haploid maize line PHWVZ with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHWVZ through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the double haploid line PHWVZ or a trait conversion of PHWVZ with another maize line. Inbred maize lines derived from double haploid maize line PHWVZ, methods for producing other inbred maize lines derived from double haploid maize line PHWVZ and the inbred maize lines and their parts derived by the use of those method.
Abstract:
Pollination process is disrupted by use of a pollination-disruption polynucleotide that renders the pollen unable to fertilize a sexually compatible ovule. The non-lethal nature of the pollen disruption polynucleotide is advantageous, particularly when operably linked to a transgenic polynucleotide of interest and prevents transmission of the polynucleotide through pollen. non-lethal markers are employed in an embodiment in which transgenic and non-transgenic seed can be sorted. A recombinase excision system is employed in an embodiment to activate the pollen disruption polynucleotide.
Abstract:
A novel inbred maize line designated PHWWE and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing inbred maize line PHWWE with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHWWE through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the inbred line PHWWE or a trait conversion of PHWWE with another maize line. Inbred maize lines derived from maize line PHWWE, methods for producing other inbred maize lines derived from inbred maize line PHWWE and the inbred maize lines and their parts derived by the use of those methods.
Abstract:
Compositions and methods are provided to screen, identify, select, isolate, and/or regenerate targeted integration events using seed priming. Seed priming provides the identification of a seed having stably incorporated into its genome a site-specific recombinase mediated integration of a selectable marker at a target locus operably linked to a promoter active in the seed.
Abstract:
The present invention provides methods and compositions which deliver Agrobacterium via microinjection directly into the embryo sac. At the time of injection, the embryo sac can comprise an egg cell, or alternatively, the embryo sac can be fertilized and comprise either a zygote or an embryo. Once inside the embryo sac, the Agrobacterium harboring a T-DNA having a polynucleotide of interest can express of the polynucleotide of interest in the plant. Further, the Agrobacterium can transfer the T-DNA having the polynucleotide of interest to the plant nucleus to produce a transformed plant. The polynucleotide of interest may be stably integrated into the genome of the egg cell, zygote, embryo, or endosperm, and any tissue, plant part, and/or plant generated therefrom.
Abstract:
Methods for plant transformation, for improving transformation efficiency, and for producing transgenic plants are provided. The methods comprise crossing a recipient plant from a genetic line of a plant species of interest with a donor plant selected from a transformation competent genetic line of the same plant species or of another closely related plant species to obtain a hybrid plant. Tissues obtained from the hybrid plant are transformation competent. These tissues can then be transformed with one or more nucleotide sequences of interest and selected for transgenic events having the nucleotide sequence of interest integrated within a chromosome derived from the recipient plant. Transformed cells can be selected and transgenic hybrid plants regenerated. The nucleotide sequence of interest can be introgressed into the genetic line from which the original recipient parent was derived, or into other genetic lines. Transformed plants and seeds are additionally provided.