Abstract: Compositions and methods for obtaining plant cells with modified Ht1 nucleotide sequences, modified NLB18 sequences, or both, are provided herein. The methods involve introducing double-strand breaks into the maize genome in an endogenous Ht1 encoding sequence, an endogenous NLB18 encoding sequence, or both, to modify the genomic sequence in order to enhance northern leaf blight resistance of a plant produced from the plant cell. Further provided are methods that introduce resistant alleles of Ht1 and/or NLB18 into specific sites in the genome. Plants produced by the plant cells, and seeds produced from the plants are also included. Guide polynucleotides are also provided for the use of the CRISPR-Cas system in inducing double strand breaks.

Abstract: The present disclosure involves the production of Waxy maize. Compositions and methods are provided for knocking out expression of the Waxy (Wx1) gene in maize by making double strand breaks at one or more target sites in an endogenous WX1 encoding sequence. Some methods employ one or more guide polynucleotides and a Cas endonuclease, wherein Cas endonuclease is guided by the one or more guide polynucleotides to recognize and introduce double strand breaks at specific target sites in and around the Wx1 gene. Also provided are compositions and methods for the production of Waxy maize plant cells, plant explants, seeds and grain.

Abstract: Compositions and methods are provided for genome modification of a target sequence in the genome of a plant or plant cell. The methods and compositions employ a guide RNA/Cas endonuclease system to provide an effective system for modifying or altering target sites within the genome of a plant, plant cell or seed. Also provided are compositions and methods employing a guide polynucleotide/Cas endonuclease system for genome modification of a nucleotide sequence in the genome of a cell or organism, for gene editing, and/or for inserting or deleting a polynucleotide of interest into or from the genome of a cell or organism. Once a genomic target site is identified, a variety of methods can be employed to further modify the target sites such that they contain a variety of polynucleotides of interest. Breeding methods and methods for selecting plants utilizing a two component RNA guide and Cas endonuclease system are also disclosed.

Abstract: The field is molecular biology, and more specifically, methods for chromosomal engineering of multiple native genes, such as disease resistance genes in a genomic locus using site-specific editing to produce plants. Also described herein are methods of generating heterologous genomic locus in a plant that comprises a plurality of intraspecies polynucleotide sequences.

Abstract: Compositions and methods are provided for genome modification of a target sequence in the genome of a plant or plant cell. The methods and compositions employ a guide RNA/Cas endonuclease system to provide an effective system for modifying or altering target sites within the genome of a plant, plant cell or seed. Also provided are compositions and methods employing a guide polynucleotide/Cas endonuclease system for genome modification of a nucleotide sequence in the genome of a cell or organism, for gene editing, and/or for inserting or deleting a polynucleotide of interest into or from the genome of a cell or organism. Once a genomic target site is identified, a variety of methods can be employed to further modify the target sites such that they contain a variety of polynucleotides of interest. Breeding methods and methods for selecting plants utilizing a two component RNA guide and Cas endonuclease system are also disclosed.

Abstract: Compositions and methods are provided for genome modification of a target sequence in the genome of a plant or plant cell. The methods and compositions employ a guide RNA/Cas endonuclease system to provide an effective system for modifying or altering target sites within the genome of a plant, plant cell or seed. Also provided are compositions and methods employing a guide polynucleotide/Cas endonuclease system for genome modification of a nucleotide sequence in the genome of a cell or organism, for gene editing, and/or for inserting or deleting a polynucleotide of interest into or from the genome of a cell or organism. Once a genomic target site is identified, a variety of methods can be employed to further modify the target sites such that they contain a variety of polynucleotides of interest. Breeding methods and methods for selecting plants utilizing a two component RNA guide and Cas endonuclease system are also disclosed.

Abstract: Methods for producing in a plant a complex transgenic trait locus comprising at least two altered target sequences in a genomic region of interest are disclosed. The methods involve the use of two or more double-strand-break-inducing agents, each of which can cause a double-strand break in a target sequence in the genomic region of interest which results in an alteration in the target sequence. Also disclosed are complex transgenic trait loci in plants. A complex transgenic trait locus comprises at least two altered target sequences that are genetically linked to a polynucleotide of interest. Plants, plant cells, plant parts, and seeds comprising one or more complex transgenic trait loci are also disclosed.

Abstract: Compositions and methods are provided for introducing transgenic target sites for Site Specific Integration (SSI) and/or polynucleotides of interest into at least one double-strand break target site of a double-strand-break inducing agent in a genomic window of a plant genome. Also provided are methods and compositions for producing a complex trait locus in a genomic window of a plant comprising at least one transgenic target site for site specific integration integrated in at least double-strand-break target site. The double-strand-break target site can be, but is not limited to, a target site for a zinc finger endonuclease, an engineered endonuclease, a meganuclease, a TALENs and/or a Cas endonuclease. The genomic window of said plant can comprise at least one genomic locus of interest such as a trait cassette, a transgene, a mutated gene, a native gene, an edited gene or a site-specific integration (SSI) target site.

Abstract: Compositions and methods are provided for the excision and replacement of an endogenous polynucleotide, such as a gene, using CRISPR-Cas systems. In some aspects, the gene is flanked by specific nucleotides that are targets of homology-directed repair, for the insertion of a replacement polynucleotide.

Abstract: Compositions and methods are provided for introducing transgenic target sites for Site Specific Integration (SSI) and/or polynucleotides of interest into at least one double-strand break target site of a double-strand-break inducing agent in a genomic window of a plant genome. Also provided are methods and compositions for producing a complex trait locus in a genomic window of a plant comprising at least one transgenic target site for site specific integration integrated in at least double-strand-break target site. The double-strand-break target site can be, but is not limited to, a target site for a zinc finger endonuclease, an engineered endonuclease, a meganuclease, a TALENs and/or a Cas endonuclease. The genomic window of said plant can comprise at least one genomic locus of interest such as a trait cassette, a transgene, a mutated gene, a native gene, an edited gene or a site-specific integration (SSI) target site.

Abstract: Compositions and methods are provided for agronomic trait modification of a target sequence in the genome of a plant or plant cell. The methods and compositions employ a guide RNA/Cas endonuclease system to provide an effective system for modifying or altering target sites within a genomic region of a plant, plant cell or seed to provide improvement in a desirable agronomic trait such as drought, yield, and stress tolerance. Breeding methods for selecting plants utilizing a two component RNA guide and Cas endonuclease system are also disclosed. Compositions and methods are also provided for editing a nucleotide sequence in the genome of a cell.

Abstract: Methods and compositions for modulating plant meristems. Methods are provided for modulating fea3 and/or Fcp1 genomic locus in a host plant or plant cell to improve agronomic characteristics such as kernel number.

Abstract: Methods for producing in a plant a complex transgenic trait locus comprising at least two altered target sequences in a genomic region of interest are disclosed. The methods involve the use of two or more double-strand-break-inducing agents, each of which can cause a double-strand break in a target sequence in the genomic region of interest which results in an alteration in the target sequence. Also disclosed are complex transgenic trait loci in plants. A complex transgenic trait locus comprises at least two altered target sequences that are genetically linked to a polynucleotide of interest. Plants, plant cells, plant parts, and seeds comprising one or more complex transgenic trait loci are also disclosed.

Abstract: Compositions and methods for obtaining plant cells with modified Ht1 nucleotide sequences, modified NLB18 sequences, or both, are provided herein. The methods involve introducing double-strand breaks into the maize genome in an endogenous Ht1 encoding sequence, an endogenous NLB18 encoding sequence, or both, to modify the genomic sequence in order to enhance northern leaf blight resistance of a plant produced from the plant cell. Further provided are methods that introduce resistant alleles of Ht1 and/or NLB18 into specific sites in the genome. Plants produced by the plant cells, and seeds produced from the plants are also included. Guide polynucleotides are also provided for the use of the CRISPR-Cas system in inducing double strand breaks.

Abstract: The present disclosure involves the production of Waxy maize. Compositions and methods are provided for knocking out expression of the Waxy (Wx1) gene in maize by making double strand breaks at one or more target sites in an endogenous WX1 encoding sequence. Some methods employ one or more guide polynucleotides and a Cas endonuclease, wherein Cas endonuclease is guided by the one or more guide polynucleotides to recognize and introduce double strand breaks at specific target sites in and around the Wx1 gene. Also provided are compositions and methods for the production of Waxy maize plant cells, plant explants, seeds and grain.

Abstract: The field is molecular biology, and more specifically, methods for chromosomal engineering of multiple native genes, such as disease resistance genes in a genomic locus using site-specific editing to produce plants. Also described herein are methods of generating heterologous genomic locus in a plant that comprises a plurality of intraspecies polynucleotide sequences.

Abstract: The present disclosure involves the production of Waxy maize. Compositions and methods are provided for knocking out expression of the Waxy (Wx1) gene in maize by making double strand breaks at one or more target sites in an endogenous WX1 encoding sequence. Some methods employ one or more guide polynucleotides and a Cas endonuclease, wherein Cas endonuclease is guided by the one or more guide polynucleotides to recognize and introduce double strand breaks at specific target sites in and around the Wx1 gene. Also provided are compositions and methods for the production of Waxy maize plant cells, plant explants, seeds and grain.

Abstract: The disclosure provides plant, plant parts, plant cells, seed and grain containing a targeted genetic modification that inserts an inverted repeat sequence into a gene. The disclosure further provides hybrid plants that contain the inverted repeat sequence in a single allele of the gene. Further provided are methods for decreasing expression of a gene encoding a polypeptide of interest in a hybrid plant by crossing a plant comprising the targeted genetic modification with a plant not comprising the genetic modification to produce a hybrid plant that contains the inverted repeat sequence in a single allele of the gene.

Abstract: Methods for producing in a plant a complex transgenic trait locus comprising at least two altered target sequences in a genomic region of interest are disclosed. The methods involve the use of two or more double-strand-break-inducing agents, each of which can cause a double-strand break in a target sequence in the genomic region of interest which results in an alteration in the target sequence. Also disclosed are complex transgenic trait loci in plants. A complex transgenic trait locus comprises at least two altered target sequences that are genetically linked to a polynucleotide of interest. Plants, plant cells, plant parts, and seeds comprising one or more complex transgenic trait loci are also disclosed.

Abstract: Methods for producing in a plant a complex transgenic trait locus comprising at least two altered target sequences in a genomic region of interest are disclosed. The methods involve the use of two or more double-strand-break-inducing agents, each of which can cause a double-strand break in a target sequence in the genomic region of interest which results in an alteration in the target sequence. Also disclosed are complex transgenic trait loci in plants. A complex transgenic trait locus comprises at least two altered target sequences that are genetically linked to a polynucleotide of interest. Plants, plant cells, plant parts, and seeds comprising one or more complex transgenic trait loci are also disclosed.